Single and Four-Element $Ka$-Band Transmit/Receive Phased-Array Silicon RFICs With 5-bit Amplitude and Phase Control

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Ka-band SiGe BiCMOS single- and four-element phased arrays capable of both transmit and receive operation with 5-bit phase and amplitude control are presented. The design is based on the All-RF architecture with RF phase shifters and attenuators, and a 4:1 passive power combining/dividing network. The four-element array results in an average gain of ~ 0 dB per channel and a noise figure of 9.0 dB, and is designed to be placed behind III-V T/R modules. The rms phase error is 5.6° (5-bit operation) and2. To our knowledge, this is the smallest and lowest power consumption on-chip K ¿-band phased-array to-date.