Inductively-Loaded Yagi-Uda Antenna With Cylindrical Cover for Size Reduction at VHF-UHF Bands

A new technique is employed to reduce the size of Yagi-Uda antennas. The technique consists of adding short circuited cylindrical covers to the structure, making the elements be inductively loaded, and as a result, increase the electric length. A prototype resonating at 660 MHz is developed, and com...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2011-02, Vol.59 (2), p.357-362
Main Authors: Mendez, Jose Alfredo Tirado, Jardon-Aguilar, Hildeberto, Flores-Leal, Ruben, Reyes-Ayala, Mario, Iturbide-Sanchez, Flavio
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Bands
Bandwidth
Circuits
Driver circuits
Exact sciences and technology
Gain
Lobes
Preserving
Prototypes
Radiocommunications
Reactive load
Resonant frequency
Size reduction
Telecommunications
Telecommunications and information theory
UHF antennas
Wire
wire antenna
Yagi-Uda
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Summary:A new technique is employed to reduce the size of Yagi-Uda antennas. The technique consists of adding short circuited cylindrical covers to the structure, making the elements be inductively loaded, and as a result, increase the electric length. A prototype resonating at 660 MHz is developed, and compared to a conventional Yagi-Uda antenna. An effective area reduction of 35% is achieved without decreasing, considerably, the gain, preserving the bandwidth, and front to back lobe ratio.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2010.2096397