User's Guide
Table Of Contents
- Contents
- Revision history
- Introduction
- Kit content
- Getting started
- Firmware
- Firmware update
- Hardware description
- Regulatory notices
- Glossary
- DK (Development Kit)
- GPIO
- Global Positioning System (GPS)
- Integrated Development Environment (IDE)
- MCUboot
- Near Field Communication (NFC)
- Personal Unblocking Key (PUK)
- Software Development Kit (SDK)
- SEGGER Embedded Studio (SES)
- Subscriber Identity Module (SIM)
- System in Package (SiP)
- System on Chip (SoC)
- User Equipment (UE)
- Universal Integrated Circuit Card (UICC)
- Universal Serial Bus (USB)
- Acronyms and abbreviations
- Legal notices
Hardware description
Figure 16: nRF9160 schematic
6.3.1 Antenna tuning
To improve antenna efficiency, Nordic Thingy:91 has dynamic antenna tuning.
Different tuning components are used for different frequencies. This is achieved by using tuning
components between two SP8T RF switches. The switches are automatically controlled by the nRF9160
LTE modem and set to the correct state based on the frequency of operation. Six paths are used for LTE
frequency, and one path is used for GPS frequency.
RF_SW3 RF_SW2 RF_SW1 State Band Frequency
0 0 0 RF2 - RFC Not used Not used
0 0 1 RF7 - RFC 13U/D, 28D 746 MHz - 803 MHz
0 1 0 RF5 - RFC
12U/D, 17U/D, 28U
1U/D, 2U/D, 3U/D, 4U/D,
25U/D
698 MHz - 748 MHz
1710 MHz - 2200 MHz
0 1 1 RF3 - RFC 5D, 20U, 26D 824 MHz - 894 MHz
1 0 0 RF1 - RFC 8U/D 880 MHz - 960 MHz
1 0 1 RF8 - RFC 5U, 20D, 26U 791 MHz - 849 MHz
1 1 0 RF6 - RFC Not used Not used
1 1 1 RF4 - RFC GPS 1574 MHz - 1577 MHz
Table 3: Antenna tuning bands
4418_1336 v1.2
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