A Novel Circularly polarized dielectric resonator antenna with Branch-Line Coupler and Log-Periodic Balun
Publish place: Journal of Communication Engineering، Vol: 7، Issue: 1
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JCESH-7-1_002
تاریخ نمایه سازی: 22 مهر 1398
Abstract:
A new shaped circularly polarized dielectric resonator antenna (CP DRA) is studied with branch-line coupler and log-periodic balun for the GPS application. Since the coupler and balun are located under the DRA, it does not increase the footprint of the antenna, as a result the system is very compact. Two configurations are considered in this paper. In the first configuration, an external 50Ω load is used for the matching port of the branch-line coupler. For the second one, a three-resonator log-periodic balun is used instead of branch-line coupler, thus, no lumped elements are required in this configuration. Moreover, two modes HEM11δ of the cylindrical DRA are utilized to design the wide band circular polarization. The reflection coefficient, axial ratio, antenna gain, and radiation pattern are studied for each configuration. These first and the second configurations offer an impedance bandwidth (S11
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Authors
zahra rahimian
Department of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
saeid Nikmehr
Department of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran
ali pourziad
Department of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran