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This paper presents a four-channel bi-directional core chip in 65 nm CMOS for Ka-band phased array Transmit/Receive (T/R) module. Each channel consists of a bidirectional gain block (BDGB), a 5-bit step attenuator, a 5-bit phase shifter. The chip size is 4.1 × 1.2 mm2 including pads. The phase and attenuation coverage is 360° with the LSB of 11.25°, and 31 dB with the LSB of 1 dB, respectively. The...
This paper presents a four-channel bi-directional core chip in 0.13 um CMOS for X-band phased array Transmit/Receive (T/R) module. Each channel consists of a 5-bit step attenuator, a 6-bit phase shifter, bi-directional gain blocks (BDGB), and a bi-directional amplifier (BDA). Additional circuits such as low drop out (LDO) regulator, bias circuits with band-gap reference (BGR), and serial to parallel...
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