Title :
A compact low-cost doppler sensor MMIC in SiGe technology for the ISM band at 24 GHz
Author :
Abele, P. ; Trasser, A. ; Sonmez, E. ; Schad, K.-B. ; Munding, A. ; Schumacher, Hermann
Author_Institution :
Dept. of Electron Devices and Circuits, University of Ulm, Germany
Abstract :
A Doppler sensor MMIC operating in the license free ISM band at 24GHz using SiGe technology is demonstrated. The MMIC consists of two coupled oscillators: one driving a buffer amplifier for transmitting and the other a single balanced Gilbert cell mixer for receiving. For the oscillator lumped elements are used resulting in a total chip size of only 780x690 μm2. The MMIC is mounted by a Rip-chip technique on a microwave laminate substrate with two patch antennas: one for transmitting and the other for receiving. The functionality was demonstrated by measuring the Doppler shift of several moving objects.
Keywords :
Coupling circuits; Doppler radar; Frequency; Germanium silicon alloys; Inductors; MMICs; Microwave oscillators; Power dividers; Schottky diodes; Silicon germanium; Doppler radar; MMIC mixers; MMIC oscillators;
Conference_Titel :
Microwave Conference, 2004. 34th European
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
1-58053-992-0
