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An active quasi-circulator (AQC) operating at a frequency band ranging from 1.2–3.8 GHz is designed in a 0.18-μm CMOS process. To improve the isolation between AQC's ports common-gate (CG), common-source (CS) and common-drain (CD) configurations have been employed. To particularly improve the transmitter-to-receiver port isolation, out-of-phase cancellation is employed by making the transmit signal...
Antenna is one of the key front-end components of wireless communication system and the radar system. A K-band slotted ridge waveguide antenna arrays based on radar-communication integration, consist of a transmitting antenna and a receiving antenna, is designed and measured. The relationship between the slot admittance, offset distance and resonant length of slot is analyzed. Combined with the slot...
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