A Design And Implementation of Optimum-Distributed Microstrip High-Pass Filter (HPF)

Irawati Razak; Muhammad Mimsyad; Zalfa Nur Nadhifa; Sarmilah

doi:10.31963/elekterika.v23i1.6541

Authors

Irawati Razak Department of Electrical Engineering, State Polytechnic of Ujung Pandang
Muhammad Mimsyad Department of Electrical Engineering, State Polytechnic of Ujung Pandang
Zalfa Nur Nadhifa Department of Electrical Engineering, State Polytechnic of Ujung Pandang
Sarmilah Department of Electrical Engineering, State Polytechnic of Ujung Pandang

DOI:

https://doi.org/10.31963/elekterika.v23i1.6541

Keywords:

High-pass filter; microstrip; optimum distributed; selectivity

Abstract

This paper presents the design and implementation of a fifth-order (n = 5) optimum-distributed microstrip high-pass filter (HPF) with a cut-off frequency of 1.5 GHz. The proposed HPF is intended to posses cut-off frequency of 1.5 GHz and operates up to 6.5 GHz. It is implemented on a low-cost FR4 double-layer substrate ( = 4.4, h = 1.6 mm). The filter consists of five shunt short-circuited stubs which is realized through via hole grounding and separated by connecting lines. The structure follows the Hong and Lancaster distributed synthesis method with an electrical length θc = 33.75° and 0.1 dB passband ripple. After dimensional optimization in HFSS, the simulated response reached S11 = -14.46 dB and S21 = -2.9957 dB at 1.5 GHz, with nine ripples consistent with the (2n - 1) transfer-function order. The fabricated prototype that is measured with a Vector Network Analyzer (VNA), has exhibited respons which have a good agreement with the simulation ones.

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