GXSC Ku Satcom 4T4R amplitude and phase multifunctional chip replaces ADMV4680 for application in microwave communication systems

Microwave communication systems use microwave frequency bands for information transmission and are widely used in modern communication fields. Microwave communication systems transmit information through line of sight propagation and typically operate in the frequency range of 3GHz to 30GHz. The system uses parabolic antennas to focus radio waves and supports multiple transmission and reception modes to improve transmission efficiency and capacity. The digital microwave system adopts the SDH standard to achieve a transmission rate of up to 2.4Gbit/s. This article mainly introduces the application of a GXSC Ku satellite communication 4T4R amplitude and phase multifunctional chip in the system.

This chip covers the receiving (10.7-12.7GHz) and transmitting (14-14.5GHz) frequency bands of Ku band satellite communication channels. The chip integrates 4 receiving and 4 transmitting channels, as well as corresponding power synthesis/distribution networks. It is a highly integrated silicon-based beamforming chip, and both the receiving and transmitting channels support 6-bit amplitude and 6-bit phase control. Using 4-wire standard SPI logic for register configuration and control, supporting bias adjustment and on/off control of various channels, as well as transmit/receive switching. The product advantages are as follows:

1. Performance compatible with ADMV4680

2. CMOS process, low-cost mass production

3. High transmission and reception gain ≥ 25dB

4. High transmission output power OP-1d8 power ≥ 11dBm

5. Adopting WLCSP (BGA) packaging, operating temperature ranges from -40 ℃ to 85 ℃.

At the same time, a single chip has five address lines (ADD0~ADD4) to achieve serial control of up to 32 chips in applications. The chip supports beam storage internally, making it easy to quickly switch beam states. The chip is powered by a 1.2V main power supply, the digital I0 is powered by 3.3V, and the digital I0 uses standard 3.3V CMOS logic.

Performance indicators:

Receive 10.7~12.7GHz

Launch at 14-14.5GHz

Half duplex reception/transmission time division

4T4R RF channel, integrated with successful separation/synthesis network

360 ° range phase control/6bit/LSB=5.6 °

31.5dB range amplitude control/6bit/LSB=0.5dB

Receive NF approximately 3dB

Integrated temperature sensor

Integrated Quantization ADC

Integrated 4-channel power detector

Integrated beam storage

Separate pin switching for transmitting and receiving status

4-wire SPI control

WLCSP (BGA) surface mount packaging

Integrated bias and channel control