Abstract
Abstract Harmonic effects in a wideband stepped frequency radar(650 MHzS4.5 GHz) have been analyzed. As a result of numerical analysis and simulation, when the second harmonic exists in each frequency, a time-domain result represents an additional object which does not exist but looks to be located at a distance of twice the original object distance. The second harmonics can be removed effectively by low pass filters because there are no other signals between DC and a fundamental signal. In this paper, the harmonic problem can be solved by removing the second harmonics of 650 MHz to 4.5 GHz wideband fundamental signal with two switches and four low pass filters.Key words: Harmonics, Stepped Frequency Radars, Wideband Systems 9e:Qz\Z9z\Zn9 + H/p [10041950, , i\;¢tB£@/8¤ ¥¦§¨2© Qf*aO;<=].« 8¬TiG Q(Department of Radio-Wave Engineering, Hanbat National University) *8®¯ \Z9°(Electronics and Telecommunications Research Institute) nManuscript received October 24, 2014 ; Revised February 3, 2015 ; Accepted February 3, 2015. (ID No. 20141024-087)nCorresponding Author: Dong-Ho Lee (e-mail: dhlee@hanbat.ac.kr)
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