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A X-band 5-bit switch type phase shifter (STPS) in 0.18-μm CMOS technology is presented in this paper. The proposed switched delay networks are using transmission lines to avoid process variation of small-size capacitors. For all 32 states, the insertion loss is −14 ± 3dB, including pad loss and the input and output return loss is > 8 dB over 8–12 GHz. The measzured rms amplitude error and rms...
A 2–30 GHz ring mixer with built-in active baluns for vital sign detection application is presented in this paper. This mixer was fabricated in 0.18-µm CMOS process. Two topologies of active baluns are utilized to increase the isolation between the LO and the RF ports to mitigate the dc-offset problem. With bandwidth-enhancement circuit [9] and the active load, the phase errors of both RF and LO baluns...
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