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In this paper a hybrid antenna is presented, consisting of an annular DRA, exited in multiple modes with the help of a non-linear feed, producing a 64% wide impedance bandwidth covering almost entirely the X and Ku band. Different resonant modes of the DRA along with the radiating feed help to develop diversified patterns with varying operating frequency are reported in detail. This new compact design...
A wideband antenna has been conceived and realized from a single metallic patch with air as the substrate. The patch has been strategically folded to achieve dual resonances resulting in $\text{S}_{11} \leq 10\,\text{dB}$ over a wide matching bandwidth. Basic design concept has been discussed and experimentally verified. As much as 26% bandwidth covering almost the full X-band with about 9.6 dBi peak...
In this paper a modified hybrid monopole structure with S-shaped conformal strip have been proposed. Two CDRA elements are used to improve both the matching and the impedance bandwidth of the design. Mainly three resonances are responsible for this band, the first and the third one are due to the vertical monopole and the horizontal conformal strip respectively, and the middle one is due to the HEM...
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