Title :
A Compact Coplanar MMIC Mixer for 2.4 GHz Transponder Systems
Author :
Tempel, R. ; Lütke, W. ; Wolff, I.
Author_Institution :
Institut fÿr Mobil-und Satellitenfunktechnik, Carl-Friedrich-GauÃ\x9f-Str. 2, D-47475 Kamp-Lintfort, FRG. Phone: +49-2842-981-222 Fax: +49-2842-981-299 email: tempel@imst.de
Abstract :
A compact coplanar passive MMIC mixer has been developed, realized and tested successfully as a cost effective part of an I/Q demodulator module for applications in 2.4 GHz transponder systems. Although there are no external elements required, the cold-FET mixer´s size is only 1 mm2 including bias and active matching networks. Operating with 6V/15mA DC bias, required by the active matching FETs, the mixer has a maximum conversion gain of ¿2 dB at 9.5 dBm LO power and 100 MHz IF frequency. Intermodulation measurements show an IP3 of 6.9 dBm. The small wafer area is due to a consequent use of active elements for matching and biasing purposes.
Keywords :
Circuits; Costs; Demodulation; Frequency; MESFETs; MMICs; Microwave FETs; Microwave transistors; Mixers; Transponders;
Conference_Titel :
Microwave Conference, 1998. 28th European
Conference_Location :
Amsterdam, Netherlands
DOI :
10.1109/EUMA.1998.337990
