User's Manual

V7 EXTERNAL ANTENNA RTLS MODULE USER MANUAL

3.4. RF Transceiver

The module has two complete radios, the UWB and the Bluetooth® radio.

The module contains a UWB radio operating in the unlicensed UWB band. The transmitted

signal bandwidth is 500 MHz or greater. The unit is calibrated such that the maximum radiated

spectrum density does not exceed -41 dBm/MHz and is fully compliant to the spectrum mask

defined in FCC part 15. It is also compliant with the similar spectrum regulation for regions and

countries including EU and China.

Parameter Min Max

Frequency Range (MHz) 3244 6999

10dB Bandwidth (MHz) 500

Center Frequency

(MHz) 3494.4 6489.6

Spectrum Density (dBm/MHz) N/A -41

TABLE 5. UWB RF PARAMETERS

Based on configuration via software, the module can operate on one of the four 500MHz wide

UWB channels specified in the table below.

Channel Number

enter

(MHz)

min

(MHz)

max

(MHz)

3494.4 3244.8 3744

2 3993.6 3774 4243.2

3 4492.8 4243.2 4742.4

5 6489.6 6240 6739.2

TABLE 6. UWB CHANNELS AND FREQUENCY

3.5. Layout and Footprint

The module can be installed on a carrier board using a standard SMT process. Figure 5 shows

the recommended land pattern on the carrier board.

To achieve good positioning performance, the antenna patterns must be preserved. Therefore,

it is essential that there is no metal on any layer in the KEEP OUT AREA underneath the

antennas. The orientation of the module also affects the module performance as the UWB

antenna is linear polarized. In most cases, the optimal performance is achieved when the

module is in vertical position.

The center frequency is software configurable. See table 6 for details.

min

and F

max

are the 10 dB lower and upper band edges, i.e., the frequency at which the power density

drops 10 dB below the peak power density.

Detection and Avoidance (DAA) is required in some countries for the channel(s). Redpoint’s system

does NOT implement DAA and therefore the user shall not operate the system in these channel(s).