Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/9497
Title: SOME INVESTIGATIONS ON MICROSTRIP . PATCH ANTENNA BACKED BY A CAVITY
Authors: Sekhar, T. Naga
Keywords: ELECTRONICS AND COMPUTER ENGINEERING;MICROSTRIP PATCH ANTENNA BACKED;CAVITY;METALLIC CAVITY
Issue Date: 1998
Abstract: In addition to conformability, microstrip =antennas have desirable features such as low cost and light weight which makes them extremely attractive for use in a variety of applications. The principle disadvantage of microstrip patch antennas is their narrow impedance bandwidth which results from the small separation between the patch and the ground plane. The most straight forward way to improve the bandwidth is to use a thicker substrate. Thick substrates, however, cause the propagation of surface waves which reduces the radiation efficiency and - increases the coupling between the array elements. To avoid these undesired effects, a metallic cavity is used to enclose the patch to suppress the surface waves. In addition to substrate mode elimination, the metallic cavity can also serve as a heat sink to improve heat dissipation. In the present work, a moment method formulation has been presented for a general microstrip line fed cavity backed patch antenna. Equivalence principle, in conjunction with the .boundary conditions, has been used to setup three coupled integro-differential equations. These are then reduced to. matrix form using the method of moments. The analysis is quite general, in the sense • that no restrictions have been imposed on the size of the antenna structure. And by using the derived equations a program has been written in FORTRAN -77.
URI: http://hdl.handle.net/123456789/9497
Other Identifiers: M.Tech
Research Supervisor/ Guide: Sinha, S. N.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (E & C)

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