50 watts 320Mhz power amplifier for COFDM transmitter 50WPA 305-335Mhz
Table of Contents
Introduction
The 50watts PA 320MHz power amplifier is a high-power RF amplifier designed for COFDM (Coded Orthogonal Frequency Division Multiplexing) wireless video transmission systems, suitable for the intermediate frequency UHF band (305-335MHz).
Support COFDM modulation: Adapt to QPSK/16QAM/64QAM constellation diagram, optional bandwidth 2/4/8MHz, FEC (forward error correction) and guard interval are adjustable to ensure anti-multipath interference capability.
Having high-frequency stability, strong anti-interference and industrial-grade protection.
Feature
Specification
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Central Frequency: 320Mhz (Optimum operating frequency range 305–335 MHz).
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Output Power: 50W (about 47dBm), supports power fine-tuning (such as ±1dB accuracy).
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Compatibility: Supports COFDM modulation wireless video transmitter module.
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Power supply: DC +28V, working current <10A, requires stable power supply support.
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Interface: SMA or N-type RF interface, impedance 50Ω, VSWR≤1.5:1, reduce reflection loss.
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Size and heat dissipation: Compact design (≤0.75kg), external heat sink or fanless structure, suitable for industrial environments.
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Protection level: Supports IP30 protection, working temperature -25℃~+65℃, dust and moisture proof.
- Protection mechanism: Built-in high temperature, overvoltage, open circuit and VSWR abnormal protection to improve equipment reliability.
Size
Weight
Typical application scenarios
- With COFDM transmitter, LOS (line-of-sight) transmission over 50 km is achieved, which is suitable for drone inspection, disaster relief and other scenarios.
- With external directional antennas (such as Yagi antennas), NLOS (non-line-of-sight) transmission can reach 1-3 km.
- Integrated in a 19-inch vehicle cabinet, it supports remote high-definition video return (1080P, H.265 encoding) between vehicles/ships/helicopters.
- As a relay amplifier, it extends the coverage range (such as a 100-kilometer helicopter link).
- With mini COFDM transmitter, it is used for public security reconnaissance and covert law enforcement, and supports AES-128 encrypted transmission
Performance Enhancement Solution
- Power Expansion: Can cascade higher power amplifiers (such as 100W modules), or match 3W/5W preamplifiers to increase link budget.
- Antenna Optimization: Use directional antennas (gain improvement ≥3dB) to significantly increase transmission distance and anti-interference capabilities.
- Monitoring and Maintenance: Support RS-485/RS232 interface to remotely monitor power, temperature and VSWR status for easy fault diagnosis
iVcan.com –
I recently used the 50 watts 320MHz power amplifier for COFDM transmitters (50WPA 305-335MHz), and I am very impressed with its performance. The amplifier delivers a much stronger signal, which significantly improves the transmission range and stability of my system. Even in challenging environments, the connection remains clear and reliable without noticeable interference. I also appreciate that other frequencies can be customized, making it very flexible for different applications. The build quality is robust, and the unit runs smoothly without overheating. Overall, this power amplifier is an excellent upgrade that ensures longer transmission distances and outstanding reliability.