Title :
A 60-GHz uniplanar MMIC 4× subharmonic mixer
Author :
Chapman, Michael W. ; Raman, Sanjay
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
11/1/2002 12:00:00 AM
Abstract :
A uniplanar GaAs monolithic microwave integrated circuit ×4 subharmonic mixer (SHM) has been fabricated for 60-GHz-band applications using an antiparallel diode pair in finite ground coplanar (FGC) waveguide technology. This mixer is designed to operate at an RF of 58.5-60.5 GHz, an IF of 1.5-2.5 GHz, and an LO frequency of 14-14.5 GHz. FGC transmission-line structures used in the mixer implementation were fully characterized using full-wave electromagnetic simulations and on-wafer measurements. Of several mixer configurations tested, the best results show a maximum conversion loss of 13.2 dB over the specified frequency range with a minimum local-oscillator power of 3 dBm. The minimum upper sideband conversion loss is 11.3 dB at an RF of 58.5 GHz and an IF of 2.5 GHz. This represents excellent performance for a 4× SHM operating at 60 GHz.
Keywords :
III-V semiconductors; MMIC mixers; Schottky diode mixers; circuit simulation; computational electromagnetics; coplanar waveguides; field effect MIMIC; gallium arsenide; millimetre wave mixers; 11.3 dB; 13.2 dB; 2.5 GHz; 58.5 GHz; 60 GHz; antiparallel diode pair; effective dielectric constant; finite ground coplanar waveguide technology; full-wave electromagnetic simulations; line attenuation; matching network; minimum upper sideband conversion loss; on-wafer measurements; optimum dimensions; triple-Schottky-diode mixer; uniplanar MMIC subharmonic mixer; Application specific integrated circuits; Coplanar waveguides; Diodes; Electromagnetic waveguides; Gallium arsenide; MMICs; Microwave integrated circuits; Mixers; Monolithic integrated circuits; Radio frequency;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2002.804638
