Abstract
This article presents a non-reflective strip filter (NPF) with two passbands corresponding to the first and third harmonics of the received or transmitted signal. The NPF consists of connected strip lines (LPL) and RLC circuits included into the diagonal ports of the SPL. The solution of the inverse problem of obtaining the frequency dependence of the RLC circuits is presented. The obtained ratios provide the synthesis of the frequency characteristics of the RLC circuit and, ultimately, the characteristics of a non-reflective bandpass filter. Experimental results of the study of the single- stage NPF of odd harmonics with frequencies of 0.96 GHz and 2.9 GHz with return losses of at least –10 dB in the frequency range up to 4.8 GHz are presented.
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