In the field of RF power amplifiers, customers often face a fundamental yet critical choice: should they select a modular power amplifier or a rack-mount/benchtop (chassis-based) power amplifier?

This is not a debate over competing technical approaches, but rather a distinction in product form factor. Whether modular or chassis-based, the core internal amplification chain may utilize the same semiconductor technologies—such as GaN, LDMOS, or GaAs—and offer identical frequency ranges and output power capabilities. The real difference lies in the division of labor: modular units leave integration tasks to the customer, whereas chassis-based units offer "plug-and-play" readiness.

What is a modular power amplifier?

A modular power amplifier is a compact amplification component—typically housed in a metal package or a small enclosure with an integrated heatsink—that contains the core amplifier circuitry. However, the power supply, thermal management system, control interfaces, and monitoring functions must be designed or provided by the customer within their own system.

Typical characteristics:

1. Compact size and light weight: Suitable for platforms with space and payload constraints.

2. DC power supply: Typically operates on low-voltage DC (e.g., 24V, 28V, 32V).

3. External thermal management required: Some models include a heatsink, while others require the customer to design the thermal path.

4. External control required: Signals such as gain control, enable/disable, and alarms are managed by the customer's system.

5. Flexible interfaces: Connectors (SMA, N-type, waveguide, etc.) can be configured to meet system requirements.

6. Suitable for volume integration: OEM customers can embed the module directly into their own equipment.

Typical applications:

• UAV-based RF systems
• Phased-array radar T/R modules
• Portable communication and jamming equipment
• Driver stages within test systems
• Space-constrained OEM equipment

What is a chassis-based power amplifier?

A chassis-based power amplifier is a complete, standalone amplification unit—usually housed in a standard 19-inch rack-mount or benchtop enclosure—that integrates the power supply, thermal management system, control circuitry, protection circuits, and standard interfaces; it is ready for use once the customer connects power and signal inputs.

Key Features:

1. Plug-and-Play: Built-in AC/DC power supply; typically powered directly by 220V AC.

2. Comprehensive Cooling System: Integrated fans or liquid cooling; supports long-term continuous operation.

3. Robust Control and Monitoring: Front panel display, remote control interfaces, and alarm outputs.

4. Standard Rack Dimensions: 19-inch 2U/3U/4U sizes; compatible with standard equipment racks.

5. High-Reliability Protection: Includes over-voltage, over-current, over-temperature, and VSWR protection.

6. Suitable for Various Scenarios: Laboratories, ground stations, and field deployments.

Typical Applications:

• EMC testing laboratories
• Satellite communication ground stations
• Radar transmitter stations
• Electronic warfare and jamming systems
• High-power testing and measurement

Coreal possesses R&D and manufacturing capabilities for both modular and rack-mount power amplifiers.

Representative products include:

C-Series Compact Modules: C2060H50 (1-6GHz, 200W), C2080H47 (2-8GHz, 50W), C60180H52 (8-12GHz, 150W), C80120H50 (8-12GHz, 100W), C107127H50 (10.7-12.7GHz, 100W), C180400H47 (18-40GHz, 50W)

CS-Series 19-inch Rack-mount Units: CS00210H50 (20-1000MHz, 100W), CS140145H54 (14-14.5GHz, 250W)

Please visit our Product Center to view detailed technical specifications for our modular and rack-mount power amplifiers, or contact us directly for selection advice and technical support. Whether you require compact modules for system integration or complete plug-and-play rack-mount units, Coreal provides reliable RF power amplification solutions tailored to your needs.