The passive double-balanced broadband mixer chip GX5552/5553 is applied in microwave transceivers

The microwave transceiver is a communication device that integrates the functions of receiving, transmitting, or relaying microwave signals. It serves as a core component in microwave relay communication systems and digital microwave systems, with terminal stations supporting the transmission and reception of baseband signals. To adapt to various application scenarios, the microwave transceiver must support multi-band communication. The mixer is required to possess three key characteristics: a wide frequency range, high linearity for anti-interference, and compact size with low power consumption. This paper primarily introduces a passive dual-balanced broadband mixer chip, the GX5552/5553, designed for use in microwave transceivers.

The high-performance passive dual-balanced broadband mixer chips, GX5552/5553, can be used for up-conversion or down-conversion. The mixer chips integrate internal RF baluns, supporting broadband operating frequencies from 3 to 20 GHz. They also feature an internal LO amplification chain, enabling local oscillator operation from 1 to 20 GHz, with a typical LO power requirement of only 0 dBm. Additionally, the GX5552/5553 incorporates IF baluns, supporting single-ended 50-ohm intermediate frequencies ranging from 0.5 to 9 GHz.

Key Performance Indicators of GX5552/5553:

RF operating bandwidth: 3~20GHz

LO operating bandwidth: 1~20 GHz

IF operating bandwidth: DC~6GHz

P-1dB of Down Mixer Input: 16dBm (Typical Value)

```P-1dB for Upconversion Mixer Input: 13dBm (Typical Value)```

Downconverter IIP3: 27dBm (typical value)

Upconverter IIP3: 23dBm (typical value)

Downconversion loss: 10dB (typical value)

Upconversion loss: 8dB (typical value)

Required LO power: 0dBm (typical value)

Voltage/Current: 3.3V/146mA (typical value)

Chip dimensions: 3mm × 2mm

Operating temperature range: -40°C to 125°C

Typically, microwave transceiver systems are subject to strong interference signals, requiring mixers to possess high linearity to prevent signal distortion. The GX5552/5553 features exceptional linearity (input P-1dB and IIP3) and integration, enabling the chip to accurately process signals of varying strengths in complex electromagnetic environments. This capability prevents the generation of additional spurious signals, ensuring the system‘s effective detection and identification of target signals.