HMSIW Bandpass Filter using Square Open Loop Resonator for Short Range Device Applications

Astuti, Dian Widi; Perkasa, Riki Aditia; Muslim, Muslim; Pahlevi, Trya Agung

doi:10.1109/micc48337.2019.9037570

Cited by 1 publication

(1 citation statement)

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“…This is due to its small size of approximately 1/8 of a quarter-wavelength along each side of the square [ 1 ]. The popularity and versatility of the SOLR in filter design means that numerous researchers have used it in implementing their designed filtering components [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Compact Folded-Arms Square Open-Loop Resonator to Bandpass Filter Design

Nwajana

Raymond²

2023

Micromachines

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Folded-arms square open-loop resonator (FASOLR) is a variant of the conventional microstrip square open-loop resonator (SOLR) that facilitates further device size miniaturization by having the two arms of the conventional SOLR folded inwards. This paper highlights the benefits of this brand of compact SOLR by implementing a five-pole Chebyshev bandpass filter (BPF) using compact FASOLR. The test BPF is presented, with centre frequency of 2.2 GHz, fractional bandwidth of 10%, passband ripple of 0.04321 dB, and return loss of 20 dB. The design is implemented on a Rogers RT/Duroid 6010LM substrate with a dielectric constant of 10.7 and thickness of 1.27 mm. The filter device is manufactured and characterised, with the experimentation results being used to justify the simulation results. The presented measurement and electromagnetic (EM) simulation results demonstrate a good match. The EM simulation responses achieve a minimum insertion loss of 0.8 dB and a very good channel return loss of 22.6 dB. The measurement results, on the other hand, show a minimum insertion loss of 0.9 dB and a return loss of better than 19.2 dB. The filter component has a footprint of 36.08 mm by 6.74 mm (that is, 0.26 λg x 0.05 λg), with λg indicating the guided wavelength for the 50 Ohm microstrip line impedance at the centre frequency of the proposed fifth-order bandpass filter.

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