Efficiency Improvement of Stripline Fed ArrayD. Gray, L. Shafai
Wireless 98, The Tenth International Conference on Wireless Communications, Calgary, AB, Vol. 1, Paper D-3, pp. 186-195, July 6-8, 1998
Triplate line fed arrays have been researched extensively over the last 10 years for DBS television subscriber antenna in Japan and Europe. The chief advantage of this type of planar array is the reduction of radiation from the array's feedlines. One class of triplate fed array employs a thin metal sheet with apertures punched for radiation from patches on the triplate layer. This type of triplate array is considered as a candidate for LMCS subscriber antenna. The focus of this research is to identify different methods for increasing the aperture efficiency of this type of triplate fed array, in order to counter the losses that are expected to occur at EHF. With careful spacing of the radiating elements, the parallel plate mode can be suppressed, and an aperture efficiency of 73% can be achieved. Addition of a small parasitic patch above each aperture has been shown to raise the aperture efficiency to 86%, rivaling the aperture efficiency of a parabolic reflector. However, this requires an additional foam spacer and thin film layer, which are difficult to laminate to subsequent layers. Alignment is also a concern. The computational results presented in this paper were obtained from commercially available MOM software, Zeland version 4.3.
CONTACTS: Derek Gray, Lot Shafai
TYPE: Conference Publication
Download this document W0043.pdf (4.3MB Adobe PDF Document)
FAIR USE NOTICE: This site contains copyrighted material made available under the usual allowance for making single copies of copyrighted work for scholarly research or education. If you wish to use copyrighted material from this site for purposes that go beyond this, you must obtain permission from the copyright owner. For further information please see Copyright & Fair Use or Access Copyright. All works relied upon or used in derivative works should be cited with the full references as listed below.