NDLI: A Miniaturized Yagi-Uda-Oriented Double-Ring Antenna With Circular Polarization and Directional Pattern

Content Provider	IEEE Xplore Digital Library
Author	Yan Li Sheng Sun Feng Yang
Copyright Year	2002
Abstract	A compact circular polarized (CP) double-ring antenna with directional pattern is proposed based on the Yagi-Uda concept. After integrating a local-grounded coupler inside the square ring, a circular polarized wave can be effectively radiated by exciting two orthogonally linearly polarized fundamental modes of the ring resonator, leading to a smaller size than using other high-order modes of the ring. Since the side length of miniaturized patch hybrid coupler is much smaller than the quarter-wavelength ( λ₀ /4), the whole coupler plus feeders can be fully embedded inside the ring radiator. To obtain a directional radiation pattern, the second meandered ring is then mounted under the square ring, which can be considered as an inductive Yagi-Uda reflector. Since the physical area of the reflector is almost the same with the square-ring radiator, the total size of the antenna is only about λ₀ /4 ×λ₀ /4 ×λ₀ /16, which can be a good candidate of the antennas for handled mobile terminals. Finally, a prototype of the proposed antenna is designed and fabricated. The measured results show a good agreement with the simulated results.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	945
Ending Page	948
Page Count	4
File Size	749230
File Format	PDF
ISSN	15361225
Volume Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antenna measurements Reflector antennas Antenna radiation patterns Microstrip antennas Couplers Yagi-Uda Circular polarization patch hybrid coupler ring radiator ring reflector
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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