Quectel LTE Module with Bluetooth and WiFi : Product Info : Page 82

Smart Module Series

SC606T Series Hardware Design

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1)

The bandwidth of LTE-TDD B41 for SC606T-EM, SC606T-JP, SC606T-NAD is 200 MHz (2496–2690

MHz), and the corresponding uplink EARFCN ranges from 39650 to 41589.

6.1.1. Reference Design for Main and Rx-diversity Antenna Interfaces

A reference circuit design for the main and Rx-diversity antenna interfaces is shown as below. A π-type

matching circuit should be reserved for both ANT_MAIN and ANT_DRX for better RF performance, and

the π-type matching components (R1/C1/C2, R2/C3/C4) should be placed as close to the antennas as

possible. The capacitors are not mounted by default and the resistors are 0 Ω.

ANT_MAIN

R1 0R

C1

Module

Main

antenna

NM

C2

NM

R2 0R

C3

Diversity

antenna

NM

C4

NM

ANT_DRX

Figure 30: Reference Circuit Design for Main and Rx-diversity Antenna Interfaces

6.1.2. Reference Designs for RF Layouts

For the user’s PCB, the characteristic impedance of all RF traces should be controlled to 50 Ω. The

impedance of the RF traces is usually determined by the trace width (W), the materials’ dielectric constant,

the height from the reference ground to the signal layer (H), and the spacing between RF traces and

grounds (S). Microstrip or coplanar waveguide is typically used in RF layout to control characteristic

LTE-TDD B41

1)

2496–2690

MHz

NOTE