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The prototype of a crossed-plate antenna operates across a frequency range of 2.26 GHz to 15 GHz (148% VSWR bandwidth). To suppress interference signals from nearby devices, slots are introduced to the crossed plates of the prototype antenna. The parameter study reveals that the slot length determines the stop-band center frequency and the slot width affects the stop bandwidth for a VSWR = 10 criterion...
This paper presents the radiation characteristics of a low-profile circularly polarized loop antenna that has a left-handed property. The antenna height is set to be small (less than 0.03 wavelength). The gain, axial ratio, radiation efficiency, and VSWR are discussed.
A BOR-SPR antenna is a wideband antenna. This paper presents a modified BOR-SPR antenna, which has the same configuration as the BOR-SPR, except that slots are cut into a conducting parasitic ring (SPR) surrounding a conducting body of revolution (BOR). It is found that the slots generate a stop band in the frequency response of the VSWR, where the center frequency of the stop band is sensitive to...
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