Microwave Power Amplifiers (MPAs) are electronic amplifiers designed to increase the power level of microwave-frequency signals, typically operating from 300 MHz to 300 GHz. They are widely used in RF and microwave systems where a low-power signal must be amplified before transmission.

Key Characteristics

• Frequency Range: Typically from hundreds of MHz up to millimeter-wave frequencies.

• Output Power: From a few watts to several kilowatts, depending on the application.

• Gain: Usually 20–70 dB.

• Efficiency: Varies by technology and amplifier class.

• Linearity: Critical for modern digital modulation schemes.

Common Technologies

Main Applications

Radar Systems

• Airborne radar

• Marine radar

• Weather radar

• Military surveillance radar

Satellite Communications

• Ground stations

• Satellite uplinks

• Deep-space communications

Wireless Communications

• 5G infrastructure

• Point-to-point microwave links

• Electronic warfare systems

Test & Measurement

• EMC testing

• Antenna measurements

• RF component characterization

Important Specifications

1. Frequency Range

• Example: 2–18 GHz, 18–40 GHz, DC–26.5 GHz

2. Output Power

• 1 W = 30 dBm

• 10 W = 40 dBm

• 100 W = 50 dBm

• 1000 W = 60 dBm

• Expressed in Watts or dBm

• Conversion:

3. Gain

• Example: 40 dB gain

• 0 dBm input → 40 dBm output (10 W)

4. P1dB (1 dB Compression Point)

• Indicates the maximum usable output power before significant distortion.

5. Saturation Power (Psat)

• Maximum achievable output power.

6. Efficiency

• Power Added Efficiency (PAE) is commonly used.

Typical Frequency Bands