Method of moments analysis of an aperture in a thick ground plane
Başlık çevirisi mevcut değil.
- Tez No: 400449
- Danışmanlar: DR. ERCÜMENT ARVAS
- Tez Türü: Doktora
- Konular: Bilgisayar Mühendisliği Bilimleri-Bilgisayar ve Kontrol, Elektrik ve Elektronik Mühendisliği, Computer Engineering and Computer Science and Control, Electrical and Electronics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2012
- Dil: İngilizce
- Üniversite: Syracuse University
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Elektrik ve Bilgisayar Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 119
Özet
Özet yok.
Özet (Çeviri)
The problem of electromagnetic scattering from and transmission through anarbitrarily shaped aperture is considered. The aperture is in a thick infinite perfectlyconducting ground plane. The conducting walls of the cavity inside the ground plane areof arbitrary shape. The apertures at both ends of the cavity are also of arbitrary shape.The structure is illuminated by an incident plane electromagnetic wave. The Green?sfunction for this complicated problem is almost impossible to determine. Therefore thesurface equivalence principle is used to reduce this complex problem into three simplerones. Each such problem consists of equivalent surface currents radiating in unboundedmedia. Therefore the free space Green?s function is used for each problem. An equivalentsurface magnetic current placed on the top aperture produces the scattered field in theregion where the impressed sources are. The total field inside the cavity is produced bytwo surface equivalent magnetic currents on the apertures and an equivalent surfaceelectric current residing on the walls of the cavity as well as on both apertures. Thetransmitted field on the opposite side of the impressed sources is computed by anequivalent surface magnetic current residing on the bottom aperture. Enforcing theboundary conditions on the tangential components of electric and magnetic fields on bothapertures and on the tangential components of electric field on the cavity walls results ina set of three coupled integral equations for the equivalent surface currents. Wheneverpossible, image theory is used to simplify the equations. These equations are numericallysolved using the method of moments. The surfaces are approximated by planar triangularpatches. RWG functions are used for expansion functions. An approximate Galerkinmethod is used for testing. The method is applicable for the general case where all threeregions have different material parameters. Results are computed for the case where allthese parameters are the same. The method is applicable for arbitrary sized apertures andcavities. However due to limited computing resources, only problems in the resonanceregion, where dimensions are comparable to wavelength, are considered here.Computed results are given for the case of two square apertures connected by asquare prism, two cross apertures connected by a square prism cavity, two circularapertures connected by a cylindrical cavity, and finally two circular apertures connectedby a conical cavity. Our computed results are compared with results in the literatureobtained by using other methods. Very good agreement is observed.
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