TDD-LTE PA Module BT-PL3500M-39-50N1

Integrated RF front-end module for TDD-LTE wireless communication systems, featuring 3400–3600 MHz operation, 39 dBm PA output power, 50 dB PA gain, and 25 dB LNA gain.

Product Overview

The BT-PL3500M-39-50N1 is a TDD-LTE 3500 MHz LNA PA Module designed for RF transmission and reception applications. It integrates a power amplifier (PA) for the transmit path and a low-noise amplifier (LNA) for the receive path within one compact RF module.

The PA section operates from 3400–3600 MHz with a 200 MHz bandwidth, delivering 39±1 dBm output power and 50±1 dB gain. The LNA section covers the same frequency range and provides 25±1 dB gain with a noise figure of ≤3.8 dB, supporting RF signal amplification in the receive path.

The module also provides adjustable gain, ALC, RS485 monitoring, temperature protection, power and VSWR detection, and configurable PA/LNA control. Its integrated transmit and receive functions make it suitable as an RF front-end building block for TDD-LTE wireless communication equipment.

Key Parameters

Key Advantages

01. Integrated PA & LNA

Combines transmit-side power amplification and receive-side low-noise amplification in one RF module, simplifying RF front-end integration.

02. 3400–3600 MHz Coverage

Supports a 200 MHz operating bandwidth across the 3500 MHz TDD-LTE frequency range for broadband wireless communication applications.

03. 39 dBm PA Output

The PA delivers 39±1 dBm output power, providing high-power RF amplification for the transmission path.

04. Adjustable RF Gain

Both PA and LNA provide a gain adjustment range of ≥20 dB, with a gain adjustment step of ≤1 dB.

05. RS485 Monitoring

The module supports RS485 monitoring at 19200 baud, enabling configuration and status monitoring of PA and LNA functions.

06. Protection & Detection

The PA monitoring system supports over-temperature, over-power, VSWR and PA fault alarms, together with forward/reverse power and temperature detection.

Technical Specifications

RF Performance — PA

RF Performance — LNA

Electrical

Interface & RF Connectors

Environmental

The electrical, interface, monitoring and environmental specifications above are taken from the supplied module specification.

Monitoring & Protection

The BT-PL3500M-39-50N1 provides monitoring functions for both the downlink PA and uplink LNA.

PA Monitoring

• Module address configuration

• PA ON/OFF control

• Attenuation adjustment

• ALC configuration

• Working-status query

• Over-temperature alarm

• Over-power alarm

• VSWR monitoring

• PA fault alarm

• Forward power detection

• Reverse power detection

• Amplifier temperature detection

The over-temperature protection threshold is +85°C. When the threshold is reached, the PA switches off; when the temperature falls to +65°C, the PA automatically switches on again.

LNA Monitoring

• Module address configuration

• LNA enable control

• Attenuation adjustment

• RS485-based monitoring

Dimension Drawing

Application / Technology

01. TDD-LTE RF Front-End

TDD-LTE Signal → PA/LNA Module → RF System

The integrated PA and LNA architecture supports RF transmit and receive paths within TDD-LTE wireless communication equipment.

02. RF Power Amplification

RF Input → PA → Amplified RF Output

The 39±1 dBm PA output and 50±1 dB gain provide the transmission-side RF amplification required by the system.

03. Low-Noise Receive Amplification

Weak RF Signal → LNA → Receiver

The LNA provides 25±1 dB gain with a noise figure of ≤3.8 dB for receive-path RF amplification.

04. TDD RF Transmit / Receive Path

TX Path → PA
RX Path → LNA

The module combines separate transmit and receive amplification functions into a single RF front-end module.

05. RS485 RF Module Monitoring

RF Module → RS485 → Control / Monitoring System

RS485 communication enables configuration and monitoring of PA and LNA operating parameters and status.

06. RF Protection & Detection

Power / Temperature / VSWR → Detection → Protection

Integrated monitoring supports temperature, power and VSWR detection to help protect the PA operating path.

FAQ

1. What frequency range does the BT-PL3500M-39-50N1 support?

The module operates from 3400 to 3600 MHz and provides a 200 MHz bandwidth for the PA and LNA paths.

2. What is the PA output power?

The PA provides an output power of 39±1 dBm at 25°C, with a gain of 50±1 dB.

3. What is the LNA gain?

The LNA provides 25±1 dB gain, with a noise figure of ≤3.8 dB.

4. Does the module support adjustable gain?

Yes. Both the PA and LNA provide a gain adjustment range of ≥20 dB, with an adjustment step of ≤1 dB.

5. Does the module support remote monitoring?

Yes. The module supports RS485 monitoring at 19200 baud. PA monitoring includes operating status, attenuation, ALC, temperature, power, VSWR and fault information.

6. What protection functions are available?

The PA monitoring system supports over-temperature, over-power, VSWR and PA fault alarms, together with forward/reverse power and temperature detection.