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WIDEBAND CONICAL MONOPOLE ANTENNA WITH INTEGRATED STOPBAND FILTER

By Z. H. Hu, J. R. Kelly, P. S. Hall, and P. Gardner

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Abstract:
This paper presents a conical monopole antenna with two C-shaped slots to provide a frequency stopband to suppress interference. Compared to previous work reported in the literature, the antenna provides increased gain suppression to vertically polarised signals within the notch-band of up to 41.5 dB in four specific directions. It also yields omni-directional radiation patterns at frequencies throughout the operating band, outside the rejection band. The four null directions in vertically polarised plane at the notched band frequency are explained by an analysis of simplified equivalent current sources. The effect of different length of slots has been investigated. Two methods to control the stop band directions are also discussed.

Citation:
Z. H. Hu, J. R. Kelly, P. S. Hall, and P. Gardner, "Wideband Conical Monopole Antenna with Integrated Stopband Filter," Progress In Electromagnetics Research C, Vol. 27, 223-238, 2012.
doi:10.2528/PIERC11111305

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