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Magnetic quadrupole mode excitation of a cylindrical dielectric resonator antenna using planar feed
Author(s) -
Ojha Anuj K.,
Jain Rutwik,
Kumar AV Praveen
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32042
Subject(s) - planar , excitation , dielectric , resonator , dielectric resonator antenna , materials science , dissipation factor , optics , microstrip , quadrupole , microstrip antenna , antenna feed , radiation pattern , physics , antenna (radio) , atomic physics , optoelectronics , electrical engineering , antenna efficiency , engineering , computer graphics (images) , quantum mechanics , computer science
In this article, excitation of the magnetic quadrupole mode of a cylindrical dielectric resonator antenna, designated as the HEM 21δ mode, using planar feeding technique is discussed for the first time. Two types of planar feeds—a dual‐microstrip feed and a dual‐slot feed are numerically investigated. Results show that the dual‐slot feed is more suitable for exciting the HEM 21δ mode as it gives better symmetry of the radiation pattern and lower cross‐polarization level. A DRA prototype (dielectric constant, ε r = 24, loss tangent, tanδ = 0.002, diameter, 2 a = 19.43 mm and height, h = 7.3 mm) using dual‐slot feed is fabricated and characterized. Measurements demonstrate a resonant frequency of ~ 4.96 GHz, bandwidth of ~4.4%, peak gain of ~3.45 dBi and peak cross‐polar level of ~ − 11 dB for the HEM 21δ mode, which are in decent agreement with numerical predictions.