Title :
Linearity study of DDS-based W-band FMCW sensor
Author :
Liu, Y. ; Goshi, D. ; Mai, K. ; Bui, L. ; Shih, Y.
Author_Institution :
Honeywell Int., Torrance, CA, USA
Abstract :
The linearity of a W-band frequency-modulated continuous-wave (FMCW) sensor is characterized and its impact on the range resolution of the sensor is evaluated in this paper. The millimeter-wave (mm-wave) FMCW waveform is designed and generated with a direct digital synthesizer (DDS) at base band and transferred to millimeter-wave by a combination of upconversion and multiplication. Both homodyne and heterodyne receiver architectures are studied in this investigation. The sensor linearity is characterized with mm-wave optical-delay line technique under a controlled environment to obtain accurate results.
Keywords :
CW radar; direct digital synthesis; sensors; W-band frequency-modulated continuous-wave sensor; direct digital synthesizer; heterodyne receiver architectures; homodyne receiver architectures; mm-wave optical-delay line technique; sensor linearity; Antenna measurements; Bandwidth; Chirp; Frequency conversion; Linearity; Millimeter wave technology; Optical modulation; Optical sensors; Sensor phenomena and characterization; Signal resolution; Direct digital synthesizer (DDS); chirp; frequency-modulated continuous-wave (FMCW); millimeter wave optical delay line; nonlinearity;
Conference_Titel :
Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-2803-8
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2009.5166042
