Analysis of annular slot array antennas using hankel transform and mode-matching = 한켈 변환과 모드 정합법을 이용한 환형슬롯 배열안테나의 해석

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Annular slot antennas have many practical applications because they are low-profile, lightweight, and easy to integrate with printed circuits. This kind of antenna systems may be used quite efficiently as a radiating element for mobile communication systems especially where the volume and size of radiator are crucial parameters. Annular slot antennas are therefore attractive for military applications such as radar systems and satellite communications. Boundary-value problems of scattering from an annular slot array on a radial waveguide or circular cylindrical cavity are solved rigorously by using the approach of Hankel transform and mode-matching method. Excitation sources are modeled by either a delta electric point source or a coaxial probe located in the center of the radial waveguide or cavity. The Green``s function is used to evaluate electromagnetic wave scattering from delta electric point sources. The scattered fields are expanded in terms of eigenfunctions based on the Fourier series and Hankel transform. Boundary conditions are enforced to constitute a set of simultaneous equations for discrete modal coefficients. A fast convergent series solution is obtained by using residue calculus. Scattering from a conducting circular cylindrical cavity fed by a coaxial probe of any arbitrary length situated at the center of the cavity is also analyzed. A fast convergent series solution is obtained by utilizing the Fourier transform in conjunction with eigenfucntion expansions, mode-matching, and residue calculus. Computations and experiments are performed to investigate scattering properties of an annular slot array on a radial waveguide or circular cylindrical cavity in terms of geometrical parameters and frequency. Our theoretical models for scattering from an annular slot array are useful for the analysis and design of annular slot array antennas or bandpass filters.
Advisors
Eom, Hyo-Joonresearcher엄효준researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2007
Identifier
263501/325007  / 020045061
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학전공, 2007.2, [ ix, 106 p. ]

Keywords

array antenna; cavity-backed antenna; annular slot; mode matching; 모드매칭; 배열 안테나; 공동으로 받쳐진 안테나; 환형슬롯

URI
http://hdl.handle.net/10203/35398
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=263501&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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