Service Guide

LTE Standard Module Series

EG91_Series_Hardware_Design

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5.1.3. Reference Design of RF Antenna Interface

A reference design of ANT_MAIN and ANT_DIV antenna pads is shown as below. A π-type matching

circuit should be reserved for better RF performance. The capacitors are not mounted by default.

Figure 30: Reference Circuit of RF Antenna Interface

1. EG91-AUX does not support Rx-diversity.

2. Keep a proper distance between the main antenna and the Rx-diversity antenna to improve the

receiving sensitivity.

For the operation of ANT_MAIN and ANT_DIV, see AT+QCFG="divctl" in document [5].

4. Place the

π-type matching components (R1/C1/C2, R2/C3/C4) as close to the antenna as possible.

LTE-FDD B66 1710–1780 2110–2180 MHz

NOTE