Application of the 4-Channel C/X/Ku Band Beamformer GX1000 in Broadband Detection Systems

The broadband detection system is an equipment designed for wideband signal capture, multi-target identification, and long-range detection. It requires coverage of wideband signals from the X-band to the Ku-band, utilizing beamforming technology to focus electromagnetic wave energy toward target directions, thereby enhancing signal reception gain and anti-interference capability while enabling parallel detection and resolution of multiple targets. To meet these requirements, the GXSC 4-channel C/X/Ku-band beamformer GX1000 offers a wide frequency range of 5–18 GHz, achieving seamless detection across the entire band, fully aligning with the system‘s application needs.

Designed for applications in broadband detection systems, the GX1000 covers the C-band, X-band, and Ku-band. It integrates four receive channels, four transmit channels, and corresponding power combining/distributing networks, making it a highly integrated silicon-based beamforming chip. Both the receive and transmit channels support amplitude and phase control, with a phase accuracy of 7 bits, enabling 2.8° phase control within a 360° range. The amplitude accuracy is 6 bits, supporting 0.5 dB amplitude control within a dynamic range of 31.5 dB.

The GX1000 employs 4-wire SPI logic for register configuration and control, enabling the adjustment of amplitude and phase for each channel. It supports bias tuning, channel enable/disable control, and transmit/receive switching. Additionally, the single chip features two address pins to achieve serial control of up to four multifunction chips in an application.

Internal support for beam storage enables quick beam state switching.

The transceiver employs single-pin control for convenient and rapid switching between transmit and receive modes.

Supports power modulation and can provide bias or logic control levels for off-chip PA, LNA, TR switch, fifth channel attenuator, fifth channel delay, etc.

Integrated temperature compensation reduces performance variations between high and low temperatures.

Integrated four-channel power detection for convenient system monitoring.

The chip is powered by a 3.3V main power supply, with 5V and -5V supplying the power modulation section.

The SPI digital interface operates at 3.3V logic. A negative voltage of -5V is used for the negative voltage generation in the power modulation section (the -5V and 5V voltages can be omitted if the power modulation function is not utilized).

Wide Temperature and Anti-Interference Design: Suitable for Complex Detection Environments

Broadband detection systems are often deployed in complex environments such as vehicle-mounted, shipboard, and airborne platforms, facing challenges like extreme temperatures, strong electromagnetic radiation, and vibration impacts. Traditional beamforming chips are prone to performance degradation in extreme conditions, which affects detection accuracy. The GX1000 operates within a temperature range of -40°C to 125°C, ensuring stable detection performance in both low-temperature vehicle-mounted and high-temperature shipboard scenarios.