Title :
A W-band self-oscillating subharmonic MMIC mixer
Author :
Roberts, Michael J. ; Iezekiel, Stavros ; Snowden, Christopher M.
Author_Institution :
Sch. of Electron. & Electr. Eng., Leeds Univ., UK
fDate :
12/1/1998 12:00:00 AM
Abstract :
A novel 77 GHz subharmonically pumped self-oscillating mixer has been implemented using monolithic-microwave integrated-circuit (MMIC) technology. The microstrip mixer achieves mixing and doubling simultaneously using a single 4 μm×15 μm×0.15 μm gate-length pseudomorphic high electron-mobility transistor, eliminating the need for an external local oscillator. The total circuit size is 1 mm×2 mm, including coplanar probing pads. The mixer exhibits a measured double-sideband (DSB) conversion loss of 11.0 dB at 77.6 GHz and an average measured DSB conversion loss of 15 dB from 70 to 85 GHz, which compares well with simulated results. To the authors´ knowledge, this is the first demonstration of a subharmonically pumped MMIC self-oscillating mixer operating with state-of-the-art performance at W-band frequencies
Keywords :
HEMT integrated circuits; MMIC mixers; field effect MIMIC; harmonics; microstrip circuits; millimetre wave mixers; 0.15 micron; 11 dB; 15 dB; 70 to 85 GHz; 77 GHz; EHF; MIMIC; W-band; coplanar probing pads; doubling; high electron-mobility transistor; microstrip mixer; monolithic-microwave integrated-circuit; pseudomorphic HEMT; self-oscillating MMIC mixer; subharmonic MMIC mixer; Circuit simulation; Frequency; Integrated circuit measurements; Integrated circuit technology; Local oscillators; Loss measurement; MMICs; Microstrip; Mixers; PHEMTs;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
