Title :
Investigation of a broad-band cavity-backed array antenna
Author :
Karr, B.A. ; Durham, T.E. ; Chryssomallis, M.T. ; Kralovec, J.A. ; Gothard, G.K. ; Christodoulou, C.G.
Author_Institution :
Sun Nucl. Corp., Melbourne, FL, USA
fDate :
7/1/2004 12:00:00 AM
Abstract :
A new multimode antenna consisting of a circular array of log periodic (LP) elements, suspended in dielectric material and placed in a circular cavity with a conical bottom, is presented and discussed. The conducting elements are contained within the dielectric. Far field patterns obtained using the method of moments (MoM) are compared to experimental measurements and show good agreement for both magnitude and phase. The effect of cavity cone angle on the antenna patterns is presented. Careful selection of the cone angle can result in significant suppression of undesirable higher order resonant modes on the LP elements.
Keywords :
antenna arrays; antenna radiation patterns; broadband antennas; dielectric materials; log periodic antennas; method of moments; antenna pattern; broad-band cavity-backed array antenna; cavity cone angle effect; circular array; conducting element; dielectric material; far field pattern; log periodic element; method of moment; multimode antenna; undesirable higher order resonant mode suppression; Antenna arrays; Antenna measurements; Aperture antennas; Broadband antennas; Calibration; Dielectric materials; Dielectric measurements; Frequency; Log periodic antennas; Moment methods; Antenna arrays; LP; antenna; broad-band antenna; log periodic;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2004.831326
