Low Profile Miniaturized Planar Antenna With Omnidirectional Vertically Polarized Radiation
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- Title
- Low Profile Miniaturized Planar Antenna With Omnidirectional Vertically Polarized Radiation
- Authors
- Hong, WB; Sarab; i, K
- Date Issued
- 2008-06
- Publisher
- IEEE
- Abstract
- A novel miniaturized cavity-backed composite slot loop antenna (CBCSLA) with low profile and omnidirectional radiation similar to a short dipole is presented. The antenna displays vertical polarization while having less than lambda/100 dimension in height. The geometry of the antenna is inspired from a small magnetic loop which is realized using a slot configuration on metallic ground. Since a small slot loop antenna cannot be impedance matched, a composite geometry is devised that acts like as a small slot loop and can easily be impedance matched using this configuration. The diameter of the CBCSLA can be made as small as lambda/10 or smaller. The feeding mechanism is designed in a manner to create a circumferentially-constant current distribution around the composite loop while effectively matching to a 50 Omega coaxial feed from the antenna center. Additional methods are discussed to further enhance the bandwidth and achieve a dual-band response. The antennas are designed, fabricated, and measured. It is shown that despite their small lateral dimension and extremely small height, the miniaturized cavity-backed slot loop features extremely well input impedance match, uniform radiation pattern, low cross-polarization levels and expected gain.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/36562
- DOI
- 10.1109/TAP.2008.923332
- ISSN
- 0018-926X
- Article Type
- Article
- Citation
- IEEE Transactions on Antennas and Propagation, vol. 56, no. 6, page. 1533 - 1540, 2008-06
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