The core mission of a radar system is to "see far and see clearly." The key to achieving this mission is the RF power amplifier (PA). It is responsible for amplifying weak RF excitation signals to sufficient power levels, radiating them through the antenna to illuminate targets, and receiving the echoes. The performance of the PA directly determines the radar's detection range, resolution, and anti-interference capability—making it the "energy heart" of the entire radar system.

According to the radar equation, detection range is proportional to the fourth root of transmit power; this means that doubling the detection range requires increasing the transmit power sixteen-fold. This highlights the value of the PA: delivering the highest possible output power within limited space and thermal management constraints.

In addition, the PA must meet the following critical requirements:

High linearity: Ensures spectral purity of the transmitted signal, preventing out-of-band spurious emissions from interfering with the receiver or generating false targets.

High reliability: Radar systems are often deployed in extreme environments (high altitude, maritime, desert), requiring PAs to operate across wide temperature ranges and offer a long service life.

Pulse fidelity: In pulse operation mode, the PA must ensure steep pulse rise and fall times and a flat pulse top to guarantee ranging accuracy.

Pulse Operation Mode: The Typical State for Radar PAs

Unlike communication PAs, which often operate in Continuous Wave (CW) mode, radar PAs typically operate in pulse mode. They release immense peak power within extremely short time windows (microseconds to milliseconds) and remain "silent" the rest of the time, preparing for the next transmission.

The advantages of pulse mode include:

• Achieving higher peak power for the same average power, thereby extending detection range.
• Flexibly controlling power consumption and thermal management requirements through duty cycle adjustment.
• Avoiding continuous interference from the transmitted signal to the receiver.

Coreal's radar PA products are specifically optimized for pulse mode, meeting the requirements of various radar architectures regarding key parameters such as pulse width, duty cycle, and rise/fall times. Coreal's Class 10,000 cleanroom (spanning over 1,100 square meters) and comprehensive microelectronic packaging production line—featuring sintering, die bonding, gold wire bonding, eutectic soldering, and laser lid sealing—provide a robust manufacturing foundation for high-reliability, high-consistency T/R module power amplifiers. Supported by extensive testing capabilities—including X-ray inspection, push/pull testing, and helium mass spectrometry leak detection—we ensure that every power amplifier module meets the rigorous consistency and reliability standards required by radar systems.

Coreal's product portfolio covers a wide range of frequency bands:

• L/S-band: Long-range surveillance and search radars
• C-band: Weather radars and certain search radars
• X-band: Ground surveillance radars
• Ku/Ka-band: High-resolution imaging radars and millimeter-wave radars

Whether you are developing next-generation radar systems or upgrading existing pulsed radar systems, Coreal offers reliable products and technical support ranging from standard power amplifier modules to fully customized solutions.

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