400–7200 MHz 100W GaN Ultra-Wideband Power Amplifier for EW, SDR, and EMC Applications

The MCW0472M50A is a continuous 400 MHz to 7200 MHz (0.4–7.2 GHz) ultra-wideband GaN solid-state power amplifier (SSPA) delivering 100 W continuous-wave (CW) RF output power with 50 dB power gain. Designed as a compact, single-module RF transmit chain for electronic warfare (EW), software-defined radio (SDR), and electromagnetic compatibility (EMC) test systems, it serves as a high-performance wideband RF power amplifier that replaces bulky bank-switched amplifier chains across UHF, L, S, and C bands.

Built with GaN-on-SiC transistor technology, this broadband power amplifier provides continuous coverage across a 6.8 GHz instantaneous bandwidth from a 400 × 300 × 30 mm machined aluminum enclosure.

Product Overview

• Frequency Coverage: 400–7200 MHz (0.4–7.2 GHz continuous)
• RF Output Power: 100 W CW nominal (+50 dBm)
• Power Gain: 50 dB typical (±2.5 dB passband flatness)
• Input Drive Level: 0 dBm nominal (compatible with standard SDR exciters)
• Operating Supply Voltage: 36V DC nominal (13 A max current draw)
• Primary Applications: EW platforms, SDR transceivers, EMC immunity testing

Why Use a 400–7200 MHz Single-Module Power Amplifier?

Integrating a continuous 0.4–7.2 GHz transmit architecture offers significant system-level benefits over legacy multi-band designs:

• Replace Multiple Narrowband Amplifiers: Consolidates separate UHF, L-band, S-band, and sub-6 GHz C-band power amplifiers into a single hardware footprint.
• Reduce RF Switching Complexity: Eliminates high-power RF switches, diplexers, and complex control logic, minimizing insertion losses and potential failure points.
• Simplify Multi-Band Transmitter Design: Reduces system Size, Weight, and Power (SWaP), enabling streamlined integration into vehicle-mounted, airborne, or mobile test infrastructure.

1. Quick Specification Matrix & Selection Guide

The MCW0472M50A belongs to a family of 400–7200 MHz broadband GaN amplifiers available in 20W, 50W, and 100W output configurations. The matrix below outlines core electrical, thermal, mechanical, and commercial specifications across the product line:

Technical Specification	20W UWB Module	50W High-Power Module	100W Ultra-High Power Module
SKU	MCW0472M43A	MCW0472M47A	MCW0472M50A
Frequency Coverage	400–7200 MHz (Continuous)	400–7200 MHz (Continuous)	400–7200 MHz (Continuous)
Saturated CW Output Power	20 W (+43 dBm)	50 W (+47 dBm)	100 W (+50 dBm) CW
Power Gain (Small Signal)	43 dB	47 dB	50 dB Typical
Gain Flatness Across Passband	±2.0 dB	±2.5 dB	±2.5 dB Typical
Nominal Input Drive Level	0 dBm (1 mW)	0 dBm (1 mW)	0 dBm (1 mW)
DC Operating Voltage	28V DC	36V DC	36V DC Nominal
Maximum DC Current	4 A (Max)	6 A (Max)	13 A Max (468 W DC Input)
Drain Efficiency (Typical)	22% – 28% Typical	20% – 25% Typical	20% – 25% Typical
RF Interfaces (Input / Output)	SMA Female / SMA Female	SMA Female / N-Type Female	SMA Female / N-Type Female
Baseplate Operating Temp	-40°C to +75°C	-40°C to +75°C	-40°C to +75°C
Chassis Dimensions & Weight	200 × 150 × 25 mm (~1.5 kg)	330 × 150 × 30 mm (~2.2 kg)	400 × 300 × 30 mm (~3.2 kg)
Standard Prototype Lead Time	3 to 4 Weeks	3 to 4 Weeks	3 to 4 Weeks
Minimum Order Quantity (MOQ)	1 Unit	1 Unit	1 Unit

2. Key Advantages and Typical Applications

Transmitting 100 W CW power across a 6.8 GHz instantaneous bandwidth requires low-Q microstrip impedance-matching networks that maintain gain stability without excessive insertion loss at C-band frequencies.

Key Advantages

• Single-Module Solid-State Architecture: Eliminates RF switches and diplexers associated with legacy multi-band transmitter racks, lowering overall system SWaP.
• 0 dBm Direct Drive Compatibility: With 50 dB of integrated power gain requiring only 0 dBm (1 mW) nominal RF input, the module interfaces directly with standard SDR transceivers, signal generators, and wideband exciters without external pre-amplifier driver stages.
• Stable 50 Ω Impedance Matching: Precision microstrip matching networks provide controlled input and output reflection coefficients, ensuring stable signal transmission into wideband tactical antennas or directional couplers.

Typical Applications

• Electronic Warfare (EW): Airborne EW pods, mobile vehicle ECM platforms, and broad-spectrum threat simulation systems.
• Software-Defined Radio (SDR): Multi-band, high-power transmit chains for tactical communications and field trials.
• EMC Test Infrastructure: High-field RF signal generation for radiated immunity testing in accredited test chambers.

3. Thermal Management, Power Consumption, and Interfaces

Operating a 100 W broadband RF amplifier module in continuous-wave (CW) mode requires precise thermal management. Under maximum DC input conditions at 36V DC drawing up to 13 A, approximately 368 W of electrical power is converted into heat and must be removed through the chassis thermal interface.

Thermal Design & Interface Requirements:

• 36V DC Power Distribution: Operating at 36V DC increases power density compared to 28V architectures, reducing total operating current (13 A max) and minimizing resistive losses across internal microstrip structures.
• Conduction Cooling Interface: The machined aluminum enclosure is engineered for direct conduction cooling. Baseplates must be mounted to a heavy-duty finned heatsink or liquid cold plate using high-thermal-conductivity interface materials (TIM).
• Physical Connectors: Features an SMA Female input connector and a high-power N-type Female output connector. DC power, TTL fast gating control, and internal temperature telemetry are accessible via dedicated multi-pin power and control connectors.
• Environmental Qualification & VSWR Options: The amplifier supports VSWR protection options for demanding field conditions. Environmental qualification options (including temperature cycling, shock, and vibration testing) are available for vehicle-mounted EW systems, naval installations, and mobile test trailers.

4. Factory Testing, Technical Deliverables, and Custom Options

Integrating a high-power GaN solid-state power amplifier into defense or industrial platforms requires verifiable engineering data and flexible procurement.

• Factory Testing and Technical Deliverables: Every amplifier module undergoes swept S-parameter testing and power sweep validation on calibrated RF test stations. Shipments include complete inspection reports, gain flatness sweeps, power-out vs. frequency curves, and exported .s2p Touchstone files.
• Custom Options: Need custom frequency coverage (e.g., 200 MHz to 6 GHz), modified DC operating voltages, or integrated directional couplers for forward/reflected power telemetry? MCW provides rapid custom engineering turnarounds with prototype delivery in 3 to 4 weeks.
• Minimum Order Quantity (MOQ): We support initial prototype builds, research projects, and system evaluations with a 1-unit minimum order quantity.

Frequently Asked Questions

Q1: How do you cool a 100W broadband RF amplifier in CW mode?

Under maximum DC input conditions at 36V DC, the module generates approximately 368 W of heat. The aluminum baseplate must be mounted to a finned aluminum heatsink with forced-air cooling (or a liquid cold plate) using thermal interface material (TIM) to keep baseplate temperatures within the -40°C to +75°C operating limit.

Q2: Why is a 36V DC supply used for the MCW0472M50A amplifier module?

Operating at 36V DC increases the power density of the GaN transistor stages compared to standard 28V operation. This lowers the maximum operating current to 13 A, reducing resistive I²R losses across internal matching circuits over the 6.8 GHz instantaneous bandwidth.

Q3: What VSWR mismatch protection options are available for field deployment?

Additional VSWR protection functions, including directional coupler monitoring, isolators, and RF protection circuits, can be customized according to system requirements.