How to design a E-slot antenna?
S parameter is changed by the length,width and position of slot
how dose it work?
I did a search of w*w.ieee.org and found the beginning of a series of references that may be useful. You may be inclined to follow some of these if they relate look like they may relate to your question. This will give you a place to start.
I would also consider building a model of the antenna with one of the many 2?D or 3D simulators discussed throughout the various posts in this section. With that you could get a good feeling of how the various dimensions affect the s parameters. Remember to look into the pattern effects as well. That is the heart of the antenna problem. Getting a good match is just the beginning.
Modeling or actually fabricating and measuring prototypes are the practical paths to answer this type of question.
Phase shift bandwidth and scan range in microstrip arrays by the element frequency tuning
Shafai, L. Sharma, S.K. Daneshmand, M. Mousavi, P.
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
This paper appears in: Antennas and Propagation, IEEE Transactions on
Publication Date: May 2006
Volume: 54 , Issue: 5
On page(s): 1467 - 1473
ISSN: 0018-926X
INSPEC Accession Number:8907365
Digital Object Identifier: 10.1109/TAP.2006.874313
Abstract
In this paper, the far-field phase shift properties of microstrip patch antennas are investigated. It is shown that, similar to reflectarrays, the resonant nature of microstrip patches can be used to change the phase of the radiated field. This phase change can be caused by the dimensional change of the microstrip patch, or by a reactive loading of its cavity such as an aperture on its ground plane. However, the available phase shift is limited by the antenna impedance bandwidth. The problem is initially investigated for conventional patch antennas, determining the available phase shift range. It is then studied for a wideband E-slot microstrip antenna, showing a considerably larger phase shift range. Then, a micro-electro-mechanical (MEM) based ground plane membrane, activated by an electrode from below, is proposed to adaptively generate and control the required phase shifts. It provides a low loss, continuously variable phase shifter that can be used at high frequencies for beam scanning in small arrays.
Index Terms
Inspec
Controlled Indexing
antenna radiation patterns broadband antennas impedance matching micromechanical devices microstrip antenna arrays phase shifters reflector antennas slot antenna arrays tuning
Non-controlled Indexing
MEM beam scanning far-field phase shift bandwidth frequency tuning impedance bandwidth microelectro-mechanical system microstrip patch antenna array radiation field reflectarray wideband E-slot antenna
Author Keywords
Far-field phase shift frequency tuning microstrip antenna microstrip array phased array
References
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Abstract | Full Text: PDF (280KB)
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Abstract | Full Text: PDF (120KB)
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12 Ansoft Corporations (Boulder Microwave Division) Ensemble 5.1, and Ensemble 8.
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Abstract | Full Text: PDF (752KB)
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thank you very much!