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CPW fed grid dielectric resonator antennas with enhanced gain and bandwidth
Author(s) -
Mazhar Waqas,
Klymyshyn David M.,
Tayfeh Aligodarz Matt,
Ganguly Shaon,
Qureshi Aqeel Ahmad,
Boerner Martin
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21639
Subject(s) - materials science , coplanar waveguide , dielectric resonator antenna , optoelectronics , electroforming , resonator , radiation pattern , dielectric , dielectric resonator , impedance matching , electrical impedance , optics , antenna (radio) , microwave , layer (electronics) , electrical engineering , composite material , physics , telecommunications , engineering
Metal embedded grid artificial dielectric resonator antennas (GDRAs) fed by different coplanar waveguide (CPW) feeding techniques at mm‐wave frequencies are investigated in detail. GDRAs involve embedding tall nickel metal inclusions in polymethyl‐methacrylate (PMMA) using deep X‐ray lithography and electroforming, which dramatically increases the effective permittivity of the polymer up to 5‐6 times and results in miniaturized antenna structures operating at millimeter‐wave frequencies. The options for different coplanar waveguide (CPW) feeding at 22.6‐26.6 GHz and 26.6‐29.3 GHz are studied by applying a thin 300 μm PMMA layer between the feed layer and metal inclusions of the GDRA to avoid short‐circuiting the underneath feed line structures. In addition, this results in a GDRA structure that improves the impedance bandwidth up to 16.26%, while providing a maximum realized gain of 7.2 dBi across the frequency band with excellent broadband patterns and −18 dB cross‐polarization levels.