Ka-band Single-chip GaAs PHEMT Transceiver MMIC for Ranging FMCW Radar

Abstract

In this paper, we proposed a Ka-band single-chip Transceiver MMIC based on GaAs PHEMT process. In the first, A Ka-band low phase noise PHEMT voltage controlled oscillator and a medium power amplifier were design. The presented MMIC delivers a typical transmit power of 14dBm at the center frequency of 36.5GHz with a tuning range of more than 2GHz. The close-to-carrier phase noise is shown to be around −70dBc/Hz at an offset of 10kHz for maximum output-power conditions. The receiver gain is 15dB by employing a less than 2.0dB noise figure current-reused LNA and a double balanced mixer. The transceiver MMIC also employs on-chip power splitter and low pass filter. A compact layout was optimized and the chip size is only $2.9\\text{mm}\\times 1.8\\text{mm}$. The current consumption is 115mA with a single +5V supply power. This transceiver MMIC is very conveniently for FMCW application cooperating with signal processing circuits.