IMPROVEMENT OF MICROSTRIP BAND PASS FILTER HARMONIC SPURIOUS SUPPRESSION PERFORMANCE USING BAND STOP FILTER FEED LINES

Authors

  • Somchat Sonasang Department of Electronic Technology, Faculty of Industrial Technology
  • Ravee Phromloungsri Department of Computer and Communication Engineering (CCE)

Keywords:

microstrip band pass filter, harmonic spurious suppression, band stop filter feed lines

Abstract

In this paper, a simple design technique to suppress the 2nd harmonic frequencies spurious responses of microstrip band pass filter (BPF) is presented. The technique is accomplished by using the parallel-coupled lines band stop filter (BSF) operating at 2f0 frequency as feed lines. The practicable feasibility of the technique is demonstrated by the 3rd order microstrip coupled line bandpass filter at 1.8 GHz with the 3.6 GHz coupled line band stop filters feed lines on AD600 microwave substrate. The experimental results of the proposed 1.8 GHz bandpass filters were evidently shown the spurious suppression improvement more than 30 dB at 2f0.

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Published

2018-08-04

Issue

Vol. 8 (2018): Special Issue May

Section

บทความอื่นๆ (Other Article)

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            The article has been published in Kasem Bundit Engineering Journal (KBEJ) is the copyright of the Kasem Bundit University. Do not bring all of the messages or republished except permission from the university.

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