Inline Microstrip Bandpass Filter With Two Transmission Zeros and Increased Order Using Spurious Resonance of Frequency-Dependent Inverter - Publication - Bridge of Knowledge

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Inline Microstrip Bandpass Filter With Two Transmission Zeros and Increased Order Using Spurious Resonance of Frequency-Dependent Inverter

Abstract

A design method for a class of fourth-order inline microstrip bandpass filter with two transmission zeros and 20% fractional bandwidth is presented. The filter consists of two quarter-wavelength transmission-line resonators coupled by a frequency-dependent inverter. The inverter is composed of two open-ended stubs that are connected by an interdigital capacitor and introduces two poles and two transmission zeros in the filter response. One of these poles is obtained from the spurious resonance of the capacitor, which leads to a very compact filter structure. An equivalent circuit model of the frequencydependent inverter is provided along with a detailed couplingmatrix-based synthesis procedure to design the filter prototype. The design theory is validated with a constructed 2-GHz proofof-concept prototype. Measured results are in close agreement with the synthesis and EM-simulated ones, hence verifying the devised design approach.

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Copyright (2022 Warsaw University of Technology)

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Category:
Conference activity
Type:
publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Title of issue:
2022 24th International Microwave and Radar Conference (MIKON) strony 1 - 4
Language:
English
Publication year:
2022
Bibliographic description:
Jasiński M., Sandhu M. Y., Lamęcki A., Gómez-García R., Mrozowski M.: Inline Microstrip Bandpass Filter With Two Transmission Zeros and Increased Order Using Spurious Resonance of Frequency-Dependent Inverter// 2022 24th International Microwave and Radar Conference (MIKON)/ : , 2022, s.1-4
DOI:
Digital Object Identifier (open in new tab) 10.23919/mikon54314.2022.9924960
Sources of funding:
  • Free publication
Verified by:
Gdańsk University of Technology

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