A Low-pass Filter with Wide-stop Band Using Radial-shaped Open Stub

Title & Authors
A Low-pass Filter with Wide-stop Band Using Radial-shaped Open Stub
Yoon, Ki-cheol; Kim, Seong-cheol;

Abstract
In this paper, the low pass filter with harmonics suppression and rejection using parallel coupled-line and radial type open stub is presented. And the resultant characteristic of the proposed low pass filter is that the harmonics are suppressed and rejected in wide bandwidth due to the parallel coupled-line structure. The open stub of a low pass filter is constructed in radial type which can be used to adjust the size of filter. The size of the proposed low pass filter is $\small{6.98{\times}7.60mm2}$ and the cut off frequency is 2.45 GHz. And the filter is economical in unit cost and can be constructed easily and has the merit of mass product because the filter is composed of distributed element. Also, the widely rejected harmonics is 128 % in the bandwidth and the insertion and return losses of the low pass filter are 1.07 dB and 19.5 dB, respectively.
Keywords
parallel coupled-line;radial open stub;wide band;low pass filter;harmonics rejection;
Language
Korean
Cited by
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