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The diversity performance is desired in the antenna design for UWB systems, especially in indoor application scenarios. To achieve the high isolation between the elements within a limited space, polarization and pattern diversity can be employed in the antenna design. Besides the conventional average envelope correlation coefficients, the 2- and 3-D correlation patterns are able to provide more precise...
A broadband planar antenna with stable radiation patterns is presented. It consists of a suspended radiator fed by a vertical feed through an n-shaped microstrip. The measured impedance bandwidth is 3.1-5.1 GHz for a return loss of |S11| < -10 dB, and an average gain of 7.7 dBi is achieved. There is no beam squinting across the operating frequency band. Also, this cost effective design has a high...
This paper has presented a bent dipole tag antenna for UHF item-level RFID applications. The RFID tag using the proposed antenna has exhibited a very good omnidirectional reading pattern, which has shown great potential for item-level RFID applications in restaurants or libraries for tracking the items such as plates and books.
A design concept for elevating suspended-plate radiators is presented in this paper. The proposed antenna comprises two radiators connected by a folded feeding structure. The folded structure suppresses the occurrence of higher-order modes when the height of the antenna is elevated beyond 10% of the free-space wavelength, lambda0 . The broadband radiating mechanism is explained. Both the simulation...
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