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

fYear

2009

fDate

7-12 June 2009

Firstpage

1697

Lastpage

1700

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2009. MTT '09. IEEE MTT-S International

Conference_Location

Boston, MA

ISSN

0149-645X

Print_ISBN

978-1-4244-2803-8

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2009.5166042

Filename

5166042