C-Band 100W Pulsed Solid-State Amplifier

The C-band is the traditional core frequency band for satellite communications. Thanks to its excellent propagation characteristics and resistance to rain fade, it remains widely used in commercial satellite constellations, ground backup stations, and mobile communication platforms. In response to the typical demand for pulse power amplification in this frequency band, we have introduced the C-Band 100W Pulsed Solid-State Amplifier, designed to provide users with a highly integrated, long-lasting, and easy-to-maintain power amplification solution.

This product makes extensive use of high-linearity gallium arsenide power transistors, laying the foundation for high linearity and high reliability at the component level. Through the optimized design of a multi-stage amplification chain and the precise tuning of a low-loss power combining network, the unit can stably output 100 W of pulse power in the C-band, meeting the requirements for medium- to long-range signal coverage and high-gain antenna feeding. The product has now completed its final design and undergone multiple rounds of reliability testing. Its technical specifications have been finalized, its production process is well-defined, and it is capable of meeting the rapid delivery requirements for bulk orders.

The entire unit consists of two main modules: the power supply and control module, and the RF link module. These two modules work together to efficiently convert DC power into RF pulse power.

Power Supply and Control Modules

Responsible for converting the primary power supply from an external source into the secondary power supplies required by the various RF circuit stages, and for implementing system-wide timing control, status monitoring, and fault protection. It features a built-in high-precision voltage regulation network and pulse modulation circuit, enabling precise control of the rising edge, falling edge, and pulse width parameters of RF pulses in response to external trigger signals. Built-in multi-level protection mechanisms: input under-voltage/over-voltage protection, output overcurrent protection, power amplifier transistor over-temperature protection, and antenna port standing wave ratio (SWR) anomaly protection. When an anomaly is detected, the protection circuit responds within microseconds, quickly cutting off the RF output and reporting a fault code. The power supply module uses highly reliable industrial-grade components and is treated with a three-proof coating, making it suitable for various application environments, such as ground-based fixed stations and vehicle-mounted systems.

RF Link Module

Radio frequency links are divided into three functional units in the order of signal flow:

• Driver Stage: Located at the very front end of the chain, this stage provides initial amplification of the small-signal excitation from an external input. A low-noise, high-gain gallium arsenide MMIC amplifier chip is used, which provides approximately 20 dB of gain while maintaining a low noise figure, thereby supplying sufficient drive levels for the subsequent power stage.
• Power Combiner Unit: Consists of multiple GaAs power amplifier chips in the output stage, a broadband matching network, and a low-loss power combiner. Each power amplifier chip undergoes rigorous screening to ensure consistency in saturation output power and gain. The synthesizer employs a hybrid microstrip/waveguide design, achieving a synthesis loss of less than 0.5 dB in the C-band, and efficiently combining the outputs of multiple power amplifiers into a single high-power signal. The synthetic network contains isolation resistors and an absorption load to improve the port standing wave ratio and suppress even-order harmonics.
• Coupled Detector Unit: Located at the output end of the RF link, it consists of a directional coupler and a detector diode, which sample the forward power and reflected power, respectively. The two detection outputs are sent to the ADC interface of the control module; after digital processing, they are used for closed-loop output power adjustment and real-time VSWR calculation. Users can read relevant parameters via a host computer, facilitating system-level health management.

High linearity

The product's high linearity stems from the deep synergy between the underlying components and the system architecture. The entire unit utilizes high-linearity gallium arsenide power transistors, laying an excellent foundation for linearity at the physical level. Meanwhile, through in-depth optimization of the multi-stage amplification chain and precise tuning of the low-loss power combining network, nonlinear distortion during the cascading and combining processes has been effectively suppressed. This integrated hardware and software design ensures a stable 100W pulse power output in the C-band while maximizing signal purity and significantly reducing intermodulation distortion, perfectly meeting the stringent requirements for high-fidelity RF signals in medium- to long-range signal coverage and high-gain antenna feeding.

Superior Thermal Design and Structural Engineering

The power amplifier tubes use a copper-molybdenum alloy carrier with a high thermal conductivity as the substrate and are securely brazed onto a custom heat sink using a vacuum brazing process. The heat sink substrate is designed with a fin structure to increase the convective heat transfer area, ensuring that the die junction temperature remains within the permissible range during high-duty-cycle pulse operation. Structural component machining is carried out using precision machining centers equipped with CNC boring and milling machines, wire-cut EDM machines, and EDM equipment. This enables high-precision manufacturing of complex flow channels and thin-walled cavities. In particular, we have accumulated extensive process parameters for controlling deformation in thin-walled precision parts, ensuring the consistency of RF cavities and minimizing the impact of assembly stress on RF performance.

Flexible Interfaces and Customization Capabilities

The product provides standard RF input/output interfaces as well as a multi-pin control interface. Users can send external trigger pulses and enable signals through the control interface, and read the power amplifier's status indicators. The power supply supports multiple voltage options, making it easy to integrate into various power supply platforms. Its dimensions can be slightly adjusted to fit the user's cabinet or chassis space, and it supports custom mounting flanges and panel layouts. If you need a custom C-Band 100W Pulsed Solid-State Amplifier, we can provide a tailored design solution based on specific frequency points, interface types, and thermal management requirements.

Mature Technology Status

The product has completed the design finalization and multiple rounds of reliability testing; its technical specifications have been finalized, and it is ready for mass production. Standardized procedures are in place throughout the entire process-from component screening to final unit testing-ensuring that every unit delivered offers consistent performance and stable quality.

• Commercial Low-Earth Orbit (LEO)/Medium-Earth Orbit (MEO) Satellite Constellations: Used as high-power uplink amplifiers at ground gateway stations, these devices amplify baseband signals to the required power level and transmit them via large-aperture antennas to satellites in orbit. The pulsed operating mode is compatible with time-division multiple access (TDMA) or burst communication protocols, thereby increasing uplink margin.
• Ground-based and Airborne Communication Systems: As a core component of the RF front-end transmit channel in mobile communication vehicles or UAV relay platforms, it provides stable pulsed power output and is designed to withstand complex environmental conditions such as vibration and temperature fluctuations.
• Phased-array antenna systems and radar: As active transmission channels in antenna arrays, they work in conjunction with beam control networks to enable rapid beam scanning. The fast switching characteristics of pulse power amplifiers meet pulse modulation requirements, while high-power output enhances the system's detection and communication coverage capabilities.
• Electronic Warfare Support System: Serves as a radio frequency power source for electronic countermeasures and support equipment, providing high-power, fast-response pulse output to meet signal transmission requirements in complex electromagnetic environments.
• Test and Measurement Instruments: Can be used as an RF power source in laboratory applications such as antenna pattern testing, RF device power handling testing, and electromagnetic compatibility (EMC) immunity testing.

Complete Process Quality Control

From component screening upon arrival and high-temperature aging, to single-board soldering and module assembly, and on to final system debugging and environmental testing, each stage is handled by dedicated personnel using specialized equipment. All active components and critical resistors, capacitors, and inductors undergo 100% parameter testing upon arrival to eliminate components prone to early failure. After assembly, each finished unit undergoes a comprehensive testing process, including ambient-temperature debugging, high-temperature cyclic aging, high- and low-temperature testing, vibration and shock testing, and power aging screening. All test data is automatically recorded in a database, ensuring full traceability throughout the product's lifecycle.

Precision Machining and Microwave Circuit Manufacturing Capabilities

Equipped with a precision machining center featuring CNC boring and milling machines, wire-cut EDM machines, and EDM equipment, we are capable of machining the complex, thin-walled structural components required for both spaceborne and ground-based equipment. In particular, we have mastered the precision deformation control processes for thin-walled structures required in passive microwave components. In the field of microwave circuit manufacturing, we are equipped with specialized equipment such as sputtering stations, lithography systems, and wire bonder, and possess the capability to produce high-precision ceramic microstrip circuits and highly integrated PCB assemblies. We have accumulated extensive process experience in substrate carrier bonding and component interconnection for on-board microwave equipment, ensuring the consistency and reliability of RF connections.

Standardized Production and Bulk Delivery

Our products are technically stable, our manufacturing documentation is complete, and our testing procedures are standardized, enabling us to handle multiple production batches simultaneously. As a professional manufacturer of C-Band 100W Pulsed Solid-State Amplifier, we offer end-to-end services ranging from component selection and circuit design to final product testing. For satellite-borne or high-reliability ground-based applications, we can also incorporate additional validation tests-such as irradiation testing and thermal vacuum testing-as required by the customer.

Thank you for your interest in our C-Band 100W Pulsed Solid-State Amplifier. If you would like to learn more about the product, obtain a datasheet, or request a quote, please feel free to contact us via the following methods:

Email: info@satgroundapplication.com

Please provide the following information to the best of your ability so that we can quickly match you with the optimal solution:

• Specific operating frequency band and bandwidth requirements;
• Pulse width, duty cycle, and output power requirements;
• RF interface type and structural installation requirements;
• Estimated purchase quantity and delivery timeline requirements.

We will arrange for a professional engineer to contact you within 24 hours to provide detailed technical documentation and an accurate quote. We are committed to maintaining strict confidentiality regarding all inquiries; your technical specifications and project information will be used solely for the purpose of proposing a solution.