FDD-LTE 700MHz RF Power Amplifier Module 20W with LNA
A high-gain FDD-LTE 700MHz RF power amplifier module with integrated LNA, designed for bidirectional RF signal amplification in wireless communication systems.
Product Overview
The BT-PL700M-43-50N4 is an FDD-LTE 700MHz RF Power Amplifier Module with an integrated Low Noise Amplifier (LNA). It supports a transmit frequency range of 758-788MHz and a receive frequency range of 703-733MHz, combining transmit power amplification and receive signal amplification in one RF module.
Designed for wireless communication equipment, this module amplifies transmit signals with a rated output power of 20W and provides 25±2dB receive gain with a noise figure of ≤1.8dB. These characteristics support RF system integration where both transmit power and receive sensitivity are important.
The module features adjustable transmit and receive gain, RS485 monitoring, and protection and alarm functions for operating conditions such as overtemperature, overpower, and VSWR. Its integrated monitoring capabilities help equipment manufacturers manage RF performance and simplify system-level maintenance.
Key Advantages
Designed for RF equipment integration with transmit amplification, low-noise reception, adjustable gain, and monitoring functions.
20W RF Power Amplification
Delivers 43±1dBm transmit output power for FDD-LTE 700MHz RF systems.
Integrated Low Noise Amplifier
Provides 25±2dB receive gain with a noise figure of ≤1.8dB.
Flexible Gain Adjustment
Supports a gain adjustment range of ≥20dB with adjustment steps of ≤1dB on both TX and RX paths.
RS485 Remote Monitoring
Supports configuration, status queries, and monitoring of key PA and LNA functions through RS485.
Built-In Protection and Alarms
Includes overtemperature, overpower, VSWR, and PA fault alarm functions to support equipment protection.
Compact RF Integration
Measures 130 × 110 × 21mm, providing a defined form factor for equipment integration.
Technical Specifications
Refer to the specifications below for RF performance, electrical requirements, monitoring interfaces, mechanical dimensions, and environmental conditions.
TX RF Performance
| Parameter |
Specification |
| Frequency Range |
758-788MHz |
| Bandwidth |
30MHz |
| Output Power at 25°C |
43 ± 1dBm |
| Gain |
50 ± 1dB |
| Gain Adjustment Range |
≥20dB |
| Gain Adjustment Step |
≤1dB |
| Total Gain Adjustment Error |
≤ ±1.5dB |
| ACPR |
≤ -40dBc |
| In-Band Ripple |
≤1.5dB |
| VSWR |
≤1.5 |
| EVM |
≤3% |
| Out-of-Band Spurious |
9kHz-1GHz: ≤-36dBm/30kHz; 1-12.75GHz: ≤30dBm/30kHz |
RX RF Performance
| Parameter |
Specification |
| Frequency Range |
703-733MHz |
| Gain |
25 ± 2dB |
| Gain Adjustment Range |
≥20dB |
| Gain Adjustment Step |
≤1dB |
| Total Gain Adjustment Error |
≤ ±1.5dB |
| In-Band Ripple |
≤1.5dB |
| Noise Figure |
≤1.8dB |
| VSWR |
≤1.5 |
| Maximum Input Power Without Damage |
0dBm |
Electrical Specifications
| Parameter |
Specification |
| Power Supply |
+28V DC |
| Supply Current |
≤3.5A |
| Monitoring Interface |
RS485 |
| Monitoring Baud Rate |
9600bps |
| Power Connector |
6-pin power and monitoring port |
Monitoring & Protection
| Function |
Specification |
| PA Monitoring |
On/off, attenuation (ATT), ALC, and module address configuration |
| LNA Monitoring |
Enable, attenuation (ATT), and module address configuration |
| Status Monitoring |
Overpower, overtemperature, VSWR, and attenuation status |
| PA Fault Alarms |
Overtemperature, overpower, VSWR, and PA fault |
| Overtemperature Protection |
Alarm threshold +85°C; PA switches off and automatically restarts at +65°C |
| Overpower Alarm |
Output power > Po + 2dB |
| Forward/Reverse Power Detection |
Total power detection; modulated-signal test detection range >20dBm |
| Power Detection Accuracy |
< ±2dBm |
| Amplifier Temperature Detection |
0°C to +85°C; accuracy < ±3°C |
| VSWR Detection Range |
1.4-3.0, as stated in the specification |
Mechanical Specifications
| Parameter |
Specification |
| Dimensions (L × W × H) |
130 × 110 × 21mm |
| PA Output Connector |
SMA-50KFD |
| PA Input / LNA Input / LNA Output |
5 MCX connectors in total |
Environmental Specifications
| Parameter |
Specification |
| Operating Temperature |
-25°C to +55°C |
| Storage Temperature |
-25°C to +65°C |
| Relative Humidity |
5%-95% |
Dimension Drawing
Mechanical Dimensions
The module has a compact form factor for integration into compatible RF communication equipment.
Length: 130mm
Width: 110mm
Height: 21mm
Applications & Technology
FDD-LTE 700MHz Communication Equipment
Integrates transmit power amplification and receive signal amplification into equipment operating across the specified 700MHz FDD frequency bands.
Technology: 758-788MHz TX / 703-733MHz RX
In-Building Wireless Coverage Systems
Can be evaluated as an RF amplification component in compatible indoor coverage equipment, subject to system design and regulatory requirements.
Technology: RF power amplification and low-noise reception
Compatible LTE Repeater Platforms
May be considered for repeater platforms designed for the same FDD-LTE frequency configuration and compatible RF/electrical interfaces.
Technology: TX PA + RX LNA
Industrial Wireless Communication Equipment
Can be evaluated in compatible industrial wireless equipment requiring adjustable RF gain and RS485 status monitoring.
Technology: Adjustable gain and RS485 monitoring
RF Equipment Development and Testing
Supports RF engineering evaluation and integration projects requiring a 20W-class PA, receive amplification, and gain adjustment.
Technology: RF performance integration and validation
Remotely Monitored RF Systems
RS485 monitoring and alarm functions can connect with a host controller for status queries, parameter configuration, and fault diagnosis.
Technology: RS485 control and PA protection
Frequently Asked Questions
Q1. What is the BT-PL700M-43-50N4 RF power amplifier module?
It is an FDD-LTE 700MHz RF power amplifier module with an integrated low noise amplifier (LNA), designed for compatible wireless communication equipment.
Q2. What are the transmit and receive frequency ranges?
The transmit frequency range is 758-788MHz, and the receive frequency range is 703-733MHz. Both paths have a specified bandwidth of 30MHz.
Q3. What is the rated transmit output power?
The specified output power at 25°C is 43±1dBm, equivalent to approximately 20W.
Q4. What are the TX and RX gain specifications?
The TX gain is 50±1dB, while the RX gain is 25±2dB. Both paths support a gain adjustment range of at least 20dB.
Q5. Does the module support remote monitoring and protection?
Yes. It supports RS485 monitoring at 9600bps, PA/LNA configuration, status queries, and alarms for conditions including overtemperature, overpower, VSWR, and PA faults.
Q6. What are the power supply and operating temperature requirements?
The module requires a +28V DC power supply with a specified current of ≤3.5A. Its operating temperature range is -25°C to +55°C, and its dimensions are 130 × 110 × 21mm.
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