Compact Circularly Polarized Antenna With Wide 3-dB Axial-Ratio Beamwidth
- Authors
- Park, Byung-Chul; Lee, Jeong-Hae
- Issue Date
- 2016
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Circularly polarized (CP) antennas; meta-materials; mu-negative transmission line (MNG TL); wide 3-dB axial ratio beamwidth
- Citation
- IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, v.15, pp.410 - 413
- Journal Title
- IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
- Volume
- 15
- Start Page
- 410
- End Page
- 413
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/8821
- DOI
- 10.1109/LAWP.2015.2448553
- ISSN
- 1536-1225
- Abstract
- A compact circularly polarized antenna with wide 3-dB axial-ratio (AR) beamwidth is presented. The two pairs of radiators based on mu-negative transmission lines are applied and each radiator has a capacitor at the center and a pair of vias at both edges of the radiator to induce a zeroth-order resonance mode. The two radiators for x-polarized wave are orthogonally aligned to the other two radiators for y -polarized wave, and the 90 phase difference is realized by detuning the resonance frequencies of the corresponding radiators. In particular, a circular ground plane is adopted for the symmetrical radiation pattern and optimized to have the wide 3-dB axial -ratio beamwidth. Also, a dual -ground structure is studied to suppress back radiations caused by the compact ground. The 3-dB AR beamwidth is measured as 175 degrees - 190 degrees, and the measured gains are observed as 3.8 dBic at theta = 0 degrees and 0.5 dBic (-0.5 1.2 dBic) at theta = 60 degrees.
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Collections - College of Engineering > School of Electronic & Electrical Engineering > 1. Journal Articles
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