ANNA-B4 series Stand-alone Bluetooth 5.1 low energy modules System integration manual 0 3 Abstract This manual provides a functional overview combined with best-practice design guidelines for integrating ANNA-B4 stand-alone Bluetooth® 5.1 low energy modules in customer applications. ANNA-B402 provides an open CPU architecture with a powerful MCU for customer applications, while ANNA-B412 is delivered with pre-flashed u-connectXpress software.
ANNA-B4 series - System integration manual Document information Title ANNA-B4 series Subtitle Stand-alone Bluetooth 5.1 low energy modules Document type System integration manual Document number UBX-21000517 Revision and date R03 Disclosure restriction C1-Public 28-Jan-2022 Document status explanation Draft For functional testing. Revised and supplementary data will be published later. Objective Specification Target values. Revised and supplementary data will be published later.
ANNA-B4 series - System integration manual Contents Document information ................................................................................................................................ 2 Contents .......................................................................................................................................................... 3 1 Functional description ...................................................................................................................
ANNA-B4 series - System integration manual 3.2 Antenna integration guidelines .............................................................................................................. 22 3.3 Antenna connected through the RF pin ............................................................................................... 23 RF transmission line design ........................................................................................................... 24 RF connector design .....................
ANNA-B4 series - System integration manual 7.2 European Union regulatory compliance ...............................................................................................50 Radio Equipment Directive (RED) 2014/53/EU ...........................................................................50 Compliance with the RoHS directive ............................................................................................50 7.3 FCC and IC compliance .....................................................
ANNA-B4 series - System integration manual 1 Functional description 1.1 Overview The ANNA-B4 series are small, stand-alone Bluetooth 5.1 Low Energy (LE) wireless module that are particularly suited for harsh professional environments. Based on the Nordic Semiconductor nRF52833 chip that includes an integrated RF core and powerful Arm® Cortex®-M4 with FPU processor, ANNA-B4 operates in all Bluetooth 5.1 modes – as well as 802.15.4 (Thread and Zigbee) and Nordic proprietary modes (ANNA-B402 only).
ANNA-B4 series - System integration manual 1.
ANNA-B4 series - System integration manual 1.4 Block diagrams A block diagram of the ANNA-B4x2 module is shown in Figure 2. Not all interfaces are supported by the u-connectXpress software in ANNA-B412 variants. For information about the interfaces supported specifically in ANNA-B412, see also the ANNA-B412 data sheet [6]. 1.3 V ANNA-B4x2 Nordic nRF52833 Antenna VCC_IO (1.7 – 3.6 V) Reset RF Bluetooth LE baseband RF pin 128 kB RAM 512 kB flash UART GPIO IO buffers Antenna pin VCC (1.7 – 3.
ANNA-B4 series - System integration manual 1.5 Product description ANNA-B4 Item ANNA-B402 / ANNA-B412 Bluetooth version 5.1 Band support 2.4 GHz, 40 channels Typical conducted output power +8 dBm Max radiated output power with internal antenna (EIRP) +9 dBm Max radiated output power with external antenna (EIRP) +13 dBm (pending certification) RX sensitivity (conducted) -94 dBm RX sensitivity, long range mode (conducted) -103 dBm Supported 2.
ANNA-B4 series - System integration manual Figure 3 shows the software architecture and implementation of software components for ANNA-B402 and ANNA-B412 modules. Figure 3: ANNA-B4 software structure Open CPU The open CPU architecture of ANNA-B402 series modules allows module integrators to build their own applications. Table 3 describes the possible connectivity and application support for recommended Nordic SDK environments in ANNA-B40 hardware. See also Open CPU software.
ANNA-B4 series - System integration manual u-connectXpress software ANNA-B412 modules are pre-flashed with u-connectXpress and bootloader software, which interfaces through an AT command interpreter to control customer application software running on host MCUs. Table 4 describes the feature support in the u-connectXpress software.
ANNA-B4 series - System integration manual 2 System function interfaces 2.1 Main supply input The power for ANNA-B4 modules is provided through the VCC pins. ANNA-B4 uses an integrated DC/DC converter to transform the supply voltage presented at the VCC pin into a stable system core voltage. This makes ANNA-B4 modules compatible for use in battery-powered designs.
ANNA-B4 series - System integration manual ⚠ When integrating the u-blox reference design into an end-product, the application designer is solely responsible for any unintentional emission levels produced by the end-product. ANNA-B4 integrated antenna ☞ ANNA-B4 is pre-certified with the integrated antenna. To take advantage of this certification, the module must be integrated in strict accordance with the ANNA-B4 Antenna reference design.
ANNA-B4 series - System integration manual ⚠ As the temperature sensor is embedded in the radio chip, any intensive processing can cause extra heat and impact the measurement accuracy. An external sensor is required if more accurate monitoring of the surrounding area is necessary. 2.5 Low power clock ANNA-B4 uses a 32.768 kHz low power clock to enable different power modes: active, sleep, and standby. For further information about power modes, see also the ANNA-B412 data sheet [6].
ANNA-B4 series - System integration manual Figure 4 shows the low-power clock components used on the EVK-ANNA-B4 evaluation board. Figure 4: Connecting ANNA-B412 to an external crystal oscillator Component Value Note Crystal oscillator 32.
ANNA-B4 series - System integration manual Depending on the software settings, the internal oscillator itself adds ~400 nA to the current consumption and the calibration of the oscillator adds another ~1 µA. The standby current of ANNA-B4 then increases from 2.2 µA to 3.6 µA, which is an increase of ~60%. For information about the possible settings using open CPU software, see also the application note RC oscillator configuration for nRF5 open CPU modules [8].
ANNA-B4 series - System integration manual For more information about the UART interface characteristics, see also the ANNA-B402 and ANNA-B412 data sheet [5] and [6]. Interface Default configuration COM port 115200 baud, 8 data bits, no parity, 1 stop bit, hardware flow control Table 10: Default settings for the COM port while using the u-connectXpress software It is advisable to make the UART available as either test points or as available through a connected header for software upgrade.
ANNA-B4 series - System integration manual Function Description ADC input 8/10/12-bit analog to digital converter Any analog Analog comparator input Compare two voltages, capable of generating wakeup events and interrupts Any analog PWM output Output complex pulse width modulation waveforms Connection status indication Indicates if a Bluetooth LE connection is maintained * = If left unconfigured Default ANNA-B4 pin Configurable GPIOs Any BLUE** Any ** = If using u-connectXpress software.
ANNA-B4 series - System integration manual ANNA-B4 modules have been tested with a 3 x 3 cm PCB trace antenna, so it is advisable to keep these measurements as closely as possible to antenna design. You can still use a smaller or larger antenna if it is tuned to resonate at 13.56 MHz. To comply with European regulatory demands, the NFC antenna must be placed in such a way that the space between the ANNA-B4 module and the remote NFC transmitter is always within three meters during transmission.
ANNA-B4 series - System integration manual 2.11 ANNA-B1 to ANNA-B4 migration ANNA-B4 is pin compatible with ANNA-B1 and provides a simple migration path for upgrading applications with the extra features that ANNA-B4 modules deliver, including, increased memory, increased output power, coded physical layer (PHY), higher operating temperature range, and u-connectXpress secure-boot software. Figure 7 shows the footprints of the u-connectXpress ANNA-B112 and ANNA-B412 modules.
ANNA-B4 series - System integration manual Consider the following when migrating from ANNA-B1 to ANNA-B4; that is, mounting an ANNA-B4 module onto a PCB originally designed for ANNA-B1: • • • • • • The USB interface on open CPU, ANNA-B40 modules is not accessible as USBDP and USBDM signals on pins 34 and 35 are both connected to GND. ANNA-B4 pins GPIO_10, GPIO_11, GPIO_49, GPIO_50, and GPIO_51 cannot be used. These signals are connected to GND and must be configured as inputs.
ANNA-B4 series - System integration manual 3 Design-in 3.1 Overview All application circuits must be properly designed, but there are several points that require special attention during the application design. A list of these points, in order of importance, follows: • • • • • • • • • • Select appropriate antenna type and part. Antenna circuit affects the RF compliance of the device integrating the module with applicable certification schemes.
ANNA-B4 series - System integration manual • RF section may be affected by noise sources like hi-speed digital buses. Avoid placing the antenna close to high buses or consider taking specific countermeasures like metal shields or ferrite sheets to reduce the interference. • External antennas, such as linear monopole antennas: o Choose a module integration that supports an external antenna if the product includes a metal product enclosure.
ANNA-B4 series - System integration manual RF transmission line design RF transmission lines, such as those that connect from the RF pin to the antenna or antenna connector, must be designed with a characteristic impedance of 50 . Figure 9 shows the design options and the most important parameters for designing a transmission line on a PCB: • • • Microstrip: track separated with dielectric material and coupled to a single ground plane.
ANNA-B4 series - System integration manual Contact the PCB manufacturer for specific tolerance of controlled impedance traces. As FR-4 material exhibits poor thickness stability it gives less control of impedance over the trace width. For PCBs with components larger than 0402 and dielectric thickness below 200 µm, add a keep-out; that is, some clearance (void area) on the ground reference layer below any pin on the RF transmission lines. This helps to reduce the parasitic capacitance to ground.
ANNA-B4 series - System integration manual ☞ A de-facto standard for SMA connectors suggests that the use of reverse polarity connectors (RP-SMA) on Wi-Fi and Bluetooth end products can deter end users from replacing the antenna with higher gain types that exceed regulatory limits. Observe the following recommendations for a proper layout of the connector: • Strictly follow the connector layout recommended by the manufacturer.
ANNA-B4 series - System integration manual The overall DC/DC efficiency of an SMPS depends on the current consumption during the active and idle states of the specific application. Although some DC/DC converters provide high efficiency with extremely light loads, their efficiency typically worsens when idle current drops below a few mA and reduces the battery life. As a contingency against “latch up”, include an over-current limiter to protect the module from electrical over stress (EOS).
ANNA-B4 series - System integration manual • Verify the recommended maximum signal skew for differential pairs and length matching of buses. • Minimize the routing length. Ensure that the maximum allowable length for high-speed buses is not exceeded. Longer traces generally degrade signal performance. • Track impedance matched traces. Consult with your PCB manufacturer early in the project for proper stack-up definition. • Separate the RF and digital sections of the board.
ANNA-B4 series - System integration manual Table 14 describes the ESD immunity requirements as defined by CENELEC EN 61000-4-2, ETSI EN 301 489-1, ETSI EN 301 489-7, ETSI EN 301 489-24. Application Category Immunity level All exposed surfaces of the radio equipment and ancillary equipment in a representative configuration Indirect Contact Discharge * ±8 kV *Tested on ANNA-B4 evaluation board.
ANNA-B4 series - System integration manual 4 Open CPU software ANNA-B40 series modules are used in an open CPU configuration allows customer applications to be developed in a Nordic SDK environment in the ANNA-B4 module. 4.1 Zephyr Zephyr [20] is a widely adopted open-source Real Time Operating System (RTOS) that is supported on a multitude of chipsets, including the nRF52833 chip in the ANNA-B4 module. The Zephyr project is supported by the Linux Foundation.
ANNA-B4 series - System integration manual Getting started with the Nordic nRF5 SDK When working with the Nordic nRF5 SDK on the ANNA-B4 series module, follow the procedure below to get started with the Nordic Semiconductor toolchain and examples: 1. 2. 3. ☞ 4. Download and install the nRF Connect that includes an embedded Programmer app for programming over SWD Download and install the latest SEGGER embedded studio. Download and extract the latest nRF5-SDK.
ANNA-B4 series - System integration manual An example of what a custom board support file could look like for the EVK-ANNA-B402 can be found in the u-blox short range GitHub repository [17]. The custom board can then be selected by adding a define of the symbol BOARD_CUSTOM to your build. Follow the procedure outlined below to add the BOARD_CUSTOM define statement in SEGGER Embedded Studio: 1. 2. Right-click the Project in “Project Explorer”.
ANNA-B4 series - System integration manual 6. Modify the “BOARD_” definition to define the BOARD_CUSTOM. Figure 13: Pre-processor options for modifying the Define statement in SEGGER Embedded Studio Adding a board configuration to your project Another flexible way of adding a board to your project can be to add a new build configuration to your Segger Studio project and then use this to select the correct board file for your build.
ANNA-B4 series - System integration manual 2. Configure the build configuration to use your board definition. Remember to undefine the configuration for the original board, assuming you are basing your project on an example from the Nordic nRF5 SDK. Figure 15: Configure the build configuration The build is now configured for use with your custom board file. 4.3 Definition of Low Frequency clock source ANNA-B4 modules are delivered without an external low frequency crystal oscillator (LFXO).
ANNA-B4 series - System integration manual Use the following nrfjprog command options to save the whole memory area: $ nrfjprog.exe --readuicr uicr.hex ... $ nrfjprog.exe --program uicr.hex ☞ If the bootloader supplied with the module is not used for open CPU development, the UICR register cannot be saved this way. This is because the UICR registers that hold the start address of the bootloader confuse the boot process. In these instances, the MAC address must be written separately.
ANNA-B4 series - System integration manual Memory sizes can vary depending on the SoftDevice radio stack software running on the module. In the nRF Connect Programmer, drag and drop the hex files you want to program into the GUI and then flash them to the module using the GUI. Figure 16: Selecting hex files in nRF Connect Programmer 4.5.2.
ANNA-B4 series - System integration manual 4.5.2.2 Preparing the Device Firmware Update (DFU) package The package has a special DFU package format. You use nrfutil to generate the DFU package. Use the following command options for an application that does not use SoftDevice: nrfutil pkg generate --hw-version 52 --sd-req 0x00 --application-version 0 --application app.hex app.
ANNA-B4 series - System integration manual 5 u-connectXpress software ANNA-B412 modules come pre-flashed with u-connectXpress and a secure bootloader software. To ensure that the module only boots with the original u-blox software, the secure bootloader initiates a signature verification on the flashed software binary before it is booted. ANNA-B412 u-connectXpress software can be re-flashed over the UART interface, using AT commands or the s-center client software available from the u-blox website. 5.
ANNA-B4 series - System integration manual 5. Select Tools > Software Update. Figure 18: Software update 6. Check that the correct COM port is shown in “Settings”. Select File and choose the ANNA-B41XCF-.json file from the unzipped u-connectXpress container. Figure 19: Select software file 7. Select Update. The module then reboots using the secure bootloader and flashing of both the SoftDevice and application starts automatically. 5.1.1.
ANNA-B4 series - System integration manual ☞ In contrast to the s-center configuration, UART hardware flow is not used for updating software using AT commands. The file download uses standard XMODEM-CRC16 protocol and 128 bytes packets. Prerequisites As a prerequisite to updating software using AT commands, you must open the JSON file included in the download container and make note of the defined values to be parsed with the update command.
ANNA-B4 series - System integration manual Parameter Type Description Integer Size of the firmware image. Enter the size integer for the respective software as defined in the ANNA-B41X-SI-x.x.x-xxx.txt file. Shown in hex format in the JSON file but must entered as bytes in decimal notation in the command. String RSA signature of the firmware image as base64-encoded string. Enter the 344-character text string defined in the ANNA-B41X-SI-x.x.x-xxx.txt file.
ANNA-B4 series - System integration manual 5. Setup the serial port and connection. Set “Speed” to 115200 with all other parameters set to default. Select New setting. Figure 23: Serial port setup and connection 5.1.1.2.2 ☞ Updating u-connectXpress connectivity software only You can send AT text commands to ANNA-B41 to execute tasks using open-source terminal emulator software that supports XMODEM, like TeraTerm or ExtraPuTTy.
ANNA-B4 series - System integration manual 4. While the bootloader is running, send the u-connectXpress ANNA-B41X-SW-1.0.0-0.003.bin file to ANNA-B4. The file is sent using XMODEM protocol. 5. Once the binary file has been sent, ANNA-B41 displays the greeting text +STARTUP. Enter the Software version identification AT+GMR command again to make sure that the latest software version is now installed. +STARTUP AT+GMR "3.0.0-005" OK 5.1.1.2.
ANNA-B4 series - System integration manual hvp9N/xYu2l89lbe4fPjEHG1FEqthNQicxnnSHWRw4sKXFus8dPB4sx0PmHhrvcTSXwAySlt 5trpmpQ90u6BmXTdj4k/ReBB8afFlS8RxDqDRvji8rifhxprzJK2I9yfYsbVL4ptpD+XJQv+ NPRvncpxcixJ/+HuLA1ggkfwbLeFsd2LQUL/9kbEEbqD61SzM+/q3eiNI8Bhj/mXuu28VVCs EpX0qO2kmodFfrWoLaqXUs7VUGbXYP0KsnYxQneaw96svj1xClv85TdPLgdR2pKERLpOsbK0 1QPhYxN3wpn63W8Fz7uNFMvIxk9aYI3yHPHr9WSLzevMPfcJ0gsjAg== OK> 4. Store the SoftDevice signature.
ANNA-B4 series - System integration manual 8. Prepare the bootloader to accept a file transfer using XMODEM protocol. Enter the configuration action command “x” with the ConnectivitySoftware values , , , and defined in the ANNA-B41X-CF-.json file. > x 0x27000 0x37AC0 ConnectivitySoftware rwx 0 ANNA-B41 returns a series of ‘C’ characters for as long as the bootloader is running. CCCCCCCCCCCCCCCCCCCCCCCCCC 9.
ANNA-B4 series - System integration manual ☞ If an external crystal or TCXO is mounted, the u-connectXpress software settings require a crystal accuracy of 20 ppm or better. ☞ If no external crystal or TCXO is mounted, the u-connectXpress software uses the internal RC oscillator with the settings of a calibration timer interval of 4 s and minimum calibration of 2 calibration intervals. This ensures that a calibration is performed at least once every 8 seconds and for changes of temperature above 0.
ANNA-B4 series - System integration manual 6 ⚠ Handling and soldering ANNA-B4 series modules are Electrostatic Sensitive Devices that demand the observance of special handling precautions against static damage. Failure to observe these precautions can result in severe damage to the product. 6.1 ⚠ ESD handling precautions As the risk of electrostatic discharge in the RF transceivers and patch antennas of the module is of particular concern, standard ESD safety practices are prerequisite.
ANNA-B4 series - System integration manual Reflow soldering process ANNA-B4 modules are surface mounted devices supplied in a Land Grid Array (LGA) package with gold-plated solder lands. The modules are manufactured in a lead-free process with lead-free soldering paste. The thickness of solder resist between the top side of host PCB and the bottom side of ANNA-B4 must be considered for the soldering process. ANNA-B4 modules are compatible with the industrial reflow profile for common SAC type RoHS solders.
ANNA-B4 series - System integration manual Cleaning Cleaning the module is not recommended. Residues underneath the module cannot be easily removed with a washing process. • Cleaning with water will lead to capillary effects where water is absorbed in the gap between the baseboard and the module. The combination of residues of soldering flux and encapsulated water leads to short circuits or resistor-like interconnections between neighboring pads.
ANNA-B4 series - System integration manual 7 ⚠ Qualifications and approvals Approval for the ANNA-B4 module series is currently pending. For further information about the current approval status, see Country approvals. 7.
ANNA-B4 series - System integration manual FCC compliance ANNA-B4 modules are for OEM integrations only. The end product must be professionally installed in such manner that only the authorized antennas can be used. Three variants of antenna reference designs are available for ANNA-B4 and one of these must be followed for compliance with the ANNA-B4 FCC/IISED modular approval (see Appendix B for details).
ANNA-B4 series - System integration manual RF-exposure statement 7.3.2.1 ISED Compliance This equipment complies with the requirements of IC RSS-102 issue 5 radiation exposure limits set forth for an uncontrolled environment. ☞ Having a separation distance of minimum 20 mm between the user and/or bystander and the antenna and /or radiating element ensures that the output power (EIRP.) of ANNA-B5 is below the SAR evaluation Exemption limits defined in RSS-102 issue 5 (Canadian market limits). 7.3.2.
ANNA-B4 series - System integration manual End product labeling requirements 7.3.4.1 ISED Compliance The host product shall be properly labelled to identify the modules within the host product.
ANNA-B4 series - System integration manual The following statement must be included in the end-user manual or guide: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
ANNA-B4 series - System integration manual 7.3.6.2 Co-location (simultaneous transmission) If the module is to be co-located with another transmitter, additional measurements for simultaneous transmission are required. 7.4 Japan radio equipment compliance ⚠ Approvals are pending Compliance statement ANNA-B4 series modules comply with the Japanese Technical Regulation Conformity Certification of Specified Radio Equipment (ordinance of MPT N°. 37, 1981), Article 2, Paragraph 1: • Item 19 "2.
ANNA-B4 series - System integration manual End products based on ANNA-B4 series modules and targeted for distribution in Taiwan must carry labels with the textual and graphical elements shown below. Contains Transmitter Module 內含發射器模組:: xxxxxxxyyyyyyy Other wording can be used, but only if the meaning of original messaging remains unchanged. The label must be physically attached to the product and made clearly visible for inspection. 7.
ANNA-B4 series - System integration manual 7.8 Australia and New Zealand regulatory compliance ⚠ Approvals are pending ANNA-B4 modules are compliant with the standards made by the Australian Communications and Media Authority (ACMA). The modules are compliant with AS/NZS 4268:2012 standard – Radio equipment and systems – Short range devices – Limits and methods of standard measurement. The test reports for ANNA-B4 modules can be used as part of the product certification and compliance folder.
ANNA-B4 series - System integration manual ANNA-B4 module series modules have been qualified as an end product in accordance with the Bluetooth 5.1 specification.
ANNA-B4 series - System integration manual 8 Pre-approved antennas list This chapter lists the external antennas that are pre-approved for use together with ANNA-B4 series modules. ☞ Note that not all antennas are approved for use in all markets/regions. ☞ This radio transmitter [IC: 8595A-ANNAB4] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated.
ANNA-B4 series - System integration manual Connector U.FL. Cable length 100 mm Comment Should be attached to a plastic enclosure or part for best performance. For more information, see antenna data sheet. Should not be mounted inside a metal enclosure. To be mounted on a U.FL connector.
ANNA-B4 series - System integration manual PC17.07.0070A Manufacturer Taoglas Gain +0.9 dBi Impedance 50 Ω Size 24.0 x11.0x 0.8 mm Type Patch, PCB Connector U.FL. Cable length 70 mm Comment For best performance, this antenna should be attached to a plastic enclosure or part. It should be mounted on a U.FL connector and not inside a metal enclosure. For more information, see antenna data sheet. Approval FCC, IC, RED, MIC, NCC, KCC, ANATEL, ACMA and ICASA FXP72.07.
ANNA-B4 series - System integration manual 9 Product testing 9.1 u-blox in-line production testing As part of our focus on high quality products, u-blox maintain stringent quality controls throughout the production process. This means that all units in our manufacturing facilities are fully tested and that any identified defects are carefully analyzed to improve future production quality.
ANNA-B4 series - System integration manual 9.2 OEM manufacturer production test As all u-blox products undergo thorough in-series production testing prior to delivery, OEM manufacturers do not need to repeat any firmware tests or measurements that might otherwise be necessary to confirm RF performance. Testing over analog and digital interfaces is also unnecessary during an OEM production test.
ANNA-B4 series - System integration manual Appendix A Glossary Abbreviation Definition ABS Acrylonitrile butadiene styrene ADC Analog to Digital Converter ATE Automatic Test Equipment LE Bluetooth Low Energy CTS Clear To Send DCX Data/Command Signal DFU Device Firmware Update DDR Dual-Data Rate DUT Device Under Test EMC Electro Magnetic Compatibility EMI Electro Magnetic Interference ESD Electro Static Discharge FCC Federal Communications Commission GATT Generic ATTribute profi
ANNA-B4 series - System integration manual Abbreviation Definition SMA SubMiniature version A SMD Solder Mask Defined SMPS Switching Mode Power Supply SMT Surface-Mount Technology SPI Serial Peripheral Interface SWD Serial Wire Debug Thread Networking protocol for Internet of Things (IoT) "smart" home automation devices to communicate on a local wireless mesh network THT Through-Hole Technology TRP Total Radio Power TXD Transmit Data UART Universal Asynchronous Receiver/Transmitter
ANNA-B4 series - System integration manual B Antenna reference designs Designers can take full advantage of the ANNA-B4 Single-Modular Transmitter certification approval by integrating the u-blox reference design into their products. This approach requires compliance with the following rules: • Only listed antennas can be used. For the list of approved antennas, see section Approved antennas. • Schematics and parts used in the design must be identical to those used in the u-blox reference design.
ANNA-B4 series - System integration manual Figure 29 shows the top- layer for the corner version of the internal antenna reference design. Traces and vias for other signals not present. Figure 29: Reference design for internal antenna, corner version, top layer Figure 30 shows the other layers for the corner version of the internal antenna reference design. Trace vias for other signals are not present.
ANNA-B4 series - System integration manual B.2 Internal antenna reference design with module along PCB edge When using the ANNA-B4 together with this antenna reference design, the circuit trace layout must be made in strict compliance with the instructions below. This section describes where the critical copper traces are positioned on the reference design. Figure 31 shows the top layer for the edge version of the internal antenna reference design.
ANNA-B4 series - System integration manual B.3 Reference design for external antennas (U.FL connector) When using the ANNA-B4 together with this antenna reference design, the circuit trace layout must be made in strict compliance with the instructions below. This section describes where the critical components and copper traces are positioned on the reference design. All the components placed on each RF trace must be kept as shown in the reference design.
ANNA-B4 series - System integration manual Figure 34 shows the GND layer of the external antenna reference design. Figure 34: GND layer reference design for external antenna The 50 Ω coplanar microstrip dimensions used in the reference design are described in Figure 35 and Table 24. The GND plane beneath the RF trace must be filled. Figure 35: Coplanar microstrip dimension specification Item Value T Solder mask: 20 +/- 10 µm Copper film and plating/surface coating: 35 +/- 15 µm r 3.77 +/- 0.
ANNA-B4 series - System integration manual ANNA-B4 has an identical antenna integration as ANNA-B1 and the below study of antenna gain is also applicable on ANNA-B4. However, the higher output power (+8 dBm) of ANNA-B4 needs to be added to the TRP measurements shown in Figure 37 and Table 25 and also considered when comparing operating range which are based on ANNA-B1 (+4 dBm). B.4.
ANNA-B4 series - System integration manual Table 25 shows the 3D antenna radiation patterns of the C8_1 PCB. By integrating the graph the Total Radio Power (TRP) is achieved; in this case, -5.67 dBm.
ANNA-B4 series - System integration manual B.4.2 Example application 2 Figure 38 shows a miniaturized application design used for evaluation of TRP and range. This tiny design with a 7.5 x 12 mm PCB size gives with ANNA-B1 a TRP of -8.4 dBm and ~100 m range. The antenna radiation characteristic of ANNA-B4 and ANNA-B1 is the same however the higher power of ANNA-B4 shall be considered when comparing absolute levels of TRP and range.
ANNA-B4 series - System integration manual Related documentation [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] ☞ u-connectXpress AT commands manual, UBX-14044127 u-connectXpress software user guide, UBX-16024251 ANNA-B402 product summary, UBX-20017979 ANNA-B412 product summary, UBX-21025292 ANNA-B402 data sheet, UBX-20032372 ANNA-B412 data sheet, UBX-21028698 EVK-ANNA-B4 user guide, UBX-21008123 RC oscillator configuration for nR
ANNA-B4 series - System integration manual Revision history Revision Date Name Comments R01 19-Oct-2021 mape, lber Initial release R02 22-Dec-2021 lber Restructuring of antenna section. Removed redundant voltage regulator information. Added new chapter to describe ANNA-B1 to ANNA-B4 migration. Revised Product features summary, Design-in checklists, Handling and soldering chapter.
ANNA-B4 series - System integration manual Contact For complete contact information, visit us at www.u-blox.com. u-blox Offices North, Central and South America u-blox America, Inc. Phone: E-mail: +1 703 483 3180 info_us@u-blox.com Regional Office West Coast: Phone: E-mail: +1 408 573 3640 info_us@u-blox.com Headquarters Europe, Middle East, Africa Asia, Australia, Pacific u-blox AG Phone: +65 6734 3811 E-mail: info_ap@u-blox.com Support: support_ap@u-blox.
