关键词: 超宽带, 多功能, 移相器, 衰减器, 砷化镓

Abstract: An ultra-wideband multifunction receiver MMIC (monolithic microwave integrated circuit, MMIC) has been developed using 0.15 μm GaAs (Gallium Arsenide, GaAs) pHEMT (pseudomorphic high electron mobility transistor, pHEMT) technology with operating frequency from 2 GHz to 12 GHz. The chip integrates low noise amplifier, digital attenuator, digital phase shifter, switch, 13-bit serial digital circuit and power modulation circuit, with a compact size of 4.8 mm×4.35 mm. The multifunction MMIC exhibits high phase-shifting accuracy, low noise figure and low power consumption. Measurement results demonstrate that from 2 GHz to 12 GHz, the small signal gain of the MMIC is above 29 dB and noise figure is below 2.5 dB. The RMS (root mean square, RMS) phase error and RMS attenuation error are below 3° and 0.35dB, respectively. The total power consumption is 0.37 W.

Key words: ultra-wideband, multifunction;, phase shifter, attenuator, GaAs