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

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Section

บทความอื่นๆ (Other Article)