Data Sheet
Table Of Contents
- 1. Product Introduction
- 1.1 Introduction
- 1.2 Application
- 1.3 Main Characteristics
- 1.4 Product Advantage
- 1.5 Abbreviations
- 1.6 Related Documents
- 2. Product Overview
- 2.1 Overview
- 3. Technical Specification
- 3.1. Electrical Specification
- 3.2. Physical/Ambient Characteristics
- 3.3. Pin Configuration
- 3.4 Antenna Specification
- 3.5. RF Performance
- 3.6. Soldering Temperature for Module
- 3.7. Packing
- 4. Ordering Information
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3.4 Antenna Specification
3.4.1 On Board PCB Antenna
REX3B21 has an on board PCB antenna. Notes for using PCB antenna:
Avoid placing module in a metal shell.
Keep metal object from the PCB antenna (at least 1cm above, 2.7cm plus recommend).
Do not keep module nearby the devices with electromagnetic radiation source, such as
transformers.
The design of a user's PCB should prevent the module’s PCB antenna from the interference of its
components, traces and bottom. The basic principles are:
No traces, bottom around the PCB antenna with no other components placed
The PCB antenna shall be out of PCB board
Do not cover the PCB antenna with metal shell
Figure 3-4. PCB Antenna Placement
3.4.2 U.FL Antenna Socket
Figure 3-5. U.FL Antenna socket
.
Components, traces, copper allowed
No components around, or traces or
copper at bottom. Preferred is hollow on
top or at bottom of PCB antenna.
U.FL Antenna Socket