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In this paper, a dual-orthogonal polarized Vivaldi antenna with high port isolation is presented. The dual-polarized antenna structure is achieved by inserting two orthogonal Vivaldi antennas in a cross-shaped form without a galvanic contact. To satisfy the low-end bandwidth requirements and improve the radiation characteristics in the lower frequencies, a novel exponential tapered slot edge (ETSE)...
In this paper, a low-profile RFID tag antenna designed for applications in UHF band is proposed. The antenna has planar structure, and its overall size is 60 × 26 × 0.8mm2. It has larger inductive reactance than other tag antennas, so it's easier to match with the Philips U-CODE Gen 2 RFID chip whose input impedance is 43-J800Ω at frequency of 915MHz. Measured and simulated results of the proposed...
A novel planar monopole antenna fed by a coplanar waveguide (CPW) for wireless communications in the wireless local-area network (WLAN) bands is studied, which is analyzed by the Finite Difference Time Domain Method (FDTD). The bandwidths defined by return loss less than -10 dB of the proposed antenna are about 1.21 GHz, from 2.27 to 3.48 GHz, and about 1.88 GHz, from 5.12 to 7 GHz. They can cover...
This work presents performance evaluation results for four 2 ?? 2 multiple-input-multiple-output (MIMO) prototype antenna configurations with different antenna element spacings and polarization properties. The prototypes are based on a size optimized planar inverted-F antenna (PIFA) element which applies a meander structure etched on the metallic patch. Anechoic and reverberation chamber measurements...
This work proposes an antenna design based on a size optimized planar inverted-F antenna (PIFA) with meander structure for multiple-input-multiple-output (MIMO) handset applications. Two elements orientations on half PCB, which cover different translations and rotations, are investigated in terms of diversity performance. A highly efficient parallel dualelement meander PIFA array prototype is implemented...
A frequency reconfigurable hexagonal patch antenna with switchable slot is proposed in this paper. By changing the slot status, two resonant frequency bands at 2.29GHz and 2.46GHz respectively can be obtained without special matching network, and the radiation patterns at the two frequency bands are very similar to each other. The simulated and measured results are presented to validate this concept,...
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