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An efficient method for decreasing the problems of transmitter leakages on low‐cost homodyne FMCW radar with a signal‐antenna configuration
Author(s) -
Park Jung Dong,
Kim Wan Joo
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21032
Subject(s) - direct conversion receiver , homodyne detection , electronic engineering , transmitter , antenna (radio) , continuous wave radar , engineering , signal (programming language) , radar , electrical engineering , local oscillator , voltage controlled oscillator , noise floor , telecommunications , phase noise , acoustics , computer science , physics , radar imaging , noise measurement , noise reduction , channel (broadcasting) , programming language , voltage
Abstract In this paper, we analyze the effects of IF noise due to transmitter‐signal leakage for homodyne frequency‐modulated continuous‐wave (FMCW) radar with a single‐antenna configuration. We find that the magnitude of the IF noise from the front end can be reduced by matching the LO‐signal delay time with that of the antenna leakage. As the IF noise has periodic singularities, the spectrum of the IF noise can be modeled by a VCO modulation signal (except low‐frequency elements near DC). Based on an analysis of IF noise, we implement a W‐band homodyne FMCW radar sensor and the performances are verified outdoors. The presented concept can be applicable to the design of low‐cost homodyne FMCW radars with a single‐antenna configuration. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 46: 512–515, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21032