A Ku-Band Dual-Channel T/R MMIC Based on a 0.18-μm GaAs E/D pHEMT Technology

Based on GaAs 0.18μm E/D pHEMT technology, a small size dual-channel transmitter and receiver (T/R) control chip was developed at Ku band. It contains two receiving channels and two transmitting channels, a power divider, series and parallel conversion and other functional units. For the first time, this high integrated multifunctional chip is with 48-bit series parallel converter, reducing the number of external interfaces. In addition, high precision numerical control (NC) phase shift and NC attenuation performance are realized by integrated collaborative design. Test results show that in the frequency band of 15 - 17 GHz, this chip has a gain greater than 2.1 dB in receiving state, input & output return loss less than −10 dB, phase-shift root mean square (RMS) errors of transmitting and receiving less than 2.3 and 2.4°, and attenuation RMS errors of transmitting and receiving less than 0.26 dB and 0.28 dB. The transmitting state gain is greater than 15.4 dB, the input and output return loss is less than −11 dB.