Title :
"24 GHz low-cost Doppler sensor with fundamental-frequency GaAs pseudomorphic HEMT oscillator stabilized by dielectric resonator operating in higher-order mode"
Author :
Heide, P. ; Schubert, Ryan ; Magori, V. ; Schwarte, R.
Author_Institution :
Corp. Res. & Dev., Siemens AG, Munich, Germany
Abstract :
24 GHz fundamental-frequency microwave oscillators using low-cost packaged HEMTs and a dielectric resonator in a higher-order mode are reported. From the very high quality factor of the resonator-mode, excellent phase noise (-95 dBc/Hz at 100 kHz offset) and a good temperature stability (+9 ppm/K) are achieved. The output power is about +10 dBm. By adding a demodulator diode and a patch antenna, a high-performance low-cost Doppler sensor for speed over ground measurements has been built.<>
Keywords :
Doppler effect; III-V semiconductors; Q-factor; dielectric resonators; electric sensing devices; field effect integrated circuits; gallium arsenide; hybrid integrated circuits; microwave integrated circuits; microwave oscillators; velocity measurement; 24 GHz; GaAs; demodulator diode; dielectric resonator; fundamental-frequency microwave oscillators; higher-order mode; low-cost Doppler sensor; output power; patch antenna; phase noise; pseudomorphic HEMT oscillator; quality factor; speed over ground measurements; temperature stability; Dielectrics; HEMTs; Land surface temperature; MODFETs; Microwave oscillators; Microwave sensors; Packaging; Phase noise; Q factor; Temperature sensors;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335201
