Microstrip-Ridge Gap Waveguide Filter Based on Cavity Resonators With Mushroom Inclusions

In this paper, we propose a novel microstrip-ridge gap waveguide (MS-RGW) filter configuration, which is based on cavity resonators with mushroom inclusions. The resonators are realized as defects in surrounding mushroom-based perfect magnetic conductor (PMC), and thus, the filter configuration does...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2018-01, Vol.66 (1), p.136-146
Main Authors: Birgermajer, Slobodan, Jankovic, Nikolina, Radonic, Vasa, Crnojevic-Bengin, Vesna, Bozzi, Maurizio
Format: Article
Language:English
Subjects:
Cavity resonator
Cavity resonators
Conductors
Configurations
Dispersion
filter
Impedance matching
Inclusions
Microstrip
microstrip-ridge gap waveguide (MS-RGW)
mushroom unit cell
Narrowband
Photonic band gap
Resonant frequency
Resonators
Waveguide discontinuities
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Summary:In this paper, we propose a novel microstrip-ridge gap waveguide (MS-RGW) filter configuration, which is based on cavity resonators with mushroom inclusions. The resonators are realized as defects in surrounding mushroom-based perfect magnetic conductor (PMC), and thus, the filter configuration does not require additional conductive layers nor rearrangement of the PMC elements. The hosting MS-RGW is fed through transition from SMA to microstrip ridge, enabling simple fabrication and excellent impedance matching in a wide frequency range. To demonstrate the potential of the proposed structure, four narrowband filters have been designed, fabricated, and measured. The filters exhibit excellent in-band characteristics and small dimensions.
ISSN:0018-9480
1557-9670
DOI:10.1109/TMTT.2017.2750149