Title :
An LMDS, subharmonically pumped image reject mixer
Author_Institution :
Hittite Microwave Corp., Chelmsford, MA, USA
Abstract :
In this paper we present a 25-34 GHz subharmonically pumped image reject mixer (IRM). This is to the author´s knowledge the first detailed report of a subharmonic IRM MMIC in this frequency band (Smith and Novak, 1998). It directly addresses the LMDS frequency band, and also 26 GHz and 28 GHz point to point radio applications. The IRM has a conversion loss of 11dB, an image rejection of 22-24 dB and an input IP3 of +17 dBm. To further reduce the required MMW system complexity, an on-board LO amplifier has been included reducing the required LO drive to 2 dBm while drawing only 28 mA at 4 V. Due to lumped element matching throughout, the design occupies only 2.28 mm/sup 2/ of GaAs area.
Keywords :
III-V semiconductors; MMIC mixers; circuit complexity; gallium arsenide; integrated circuit design; integrated circuit measurement; lumped parameter networks; microwave links; millimetre wave mixers; 11 dB; 25 to 34 GHz; 26 GHz; 28 GHz; 28 mA; 4 V; GaAs area; IRM; LMDS frequency band; LMDS subharmonically pumped image reject mixer; LO drive; MMW system complexity; conversion loss; design; image rejection; lumped element matching; on-board LO amplifier; point to point radio applications; subharmonic IRM MMIC; subharmonically pumped image reject mixer; Assembly; Bandwidth; Diodes; Filters; Gallium arsenide; MMICs; Radio frequency; Radiofrequency amplifiers; Tellurium; Topology;
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 2001. 23rd Annual Technical Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-6663-8
DOI :
10.1109/GAAS.2001.964341
