I-Jen ChenPowen HsuHUEI WANG2018-09-102018-09-102003https://www.scopus.com/inward/record.uri?eid=2-s2.0-0742286797&doi=10.1109%2fTMTT.2003.819212&partnerID=40&md5=aa077be3379370626cea34115a67601fA single-chip monolithic integrated V-band folded-slot antenna with two Schottky-barrier diodes and a local oscillator source is developed as a quasi-optical receiver for the first time. The monolithic microwave integrated circuit consists of a voltage-controlled oscillator (VCO), a coplanar waveguide (CPW)-to-slotline transition, a low-pass filter, a folded-slot antenna, and a 180° single balanced mixer. The chip is fabricated based on the 0.15-μm GaAs high electron-mobility transistor technology and the overall chip size is 3 × 1.5 mm2. A finite-difference time-domain method solver is also developed for analyzing the embedded impedance characteristics of the folded-slot antenna to design the mixer. The chip is placed on an extended hemispherical silicon substrate lens to be a quasi-optical receiver. The performance of the receiver is verified by experimental measurements. The VCO has achieved a tuning range from 61.9 to 62.5 GHz and approximately 9.3-dBm output power. The CPW-to-slotline transition has bandwidth from 50 to 70 GHz. The mixer results in 15-dB single-sideband conversion loss and the receiving patterns of the IF power are also measured.[SDGs]SDG7Coplanar waveguides (CPWs); MMIC oscillators; Monolithic-microwave integrated-circuit (MMIC) mixers; Slot antennas; Slotlinejournal article10.1109/tmtt.2003.8192122-s2.0-0742286797