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A shorting-wall loaded metamaterial mushroom array antenna is proposed for bandwidth enhancement and compact design. Owing to the shorting-wall loading, the lower frequency region of the right-handed branch of the composite right/left-handed (CRLH) mushroom structure is exploited. The operating modes of the antenna are investigated. The antenna prototype at 5-GHz band exhibits 26% impedance bandwidth...
In this letter, a compact substrate integrated waveguide (SIW) slot antenna array with a comb-shaped choke is proposed for low back-lobe radiation. The comb-shaped choke consists of an array of quarter-wavelength short-end parallel microstrip lines on the bottom surface of the array for lowering the backward radiation by suppressing the diffraction at the edges of the substrate. The proposed antenna...
A compact ultrawideband (UWB) monopole-like slot antenna having band-notched characteristics over entire 5-GHz wireless local area network (WLAN) band is presented. The proposed antenna comprises a coplanar waveguide (CPW) fed monopole-like slot and band-notched structures. By adding grounded open-circuited stubs in the slot and embedding spur-lines in the fork-shaped feeding structure, the notched-frequency...
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