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A pair of face‐to‐face semicircular split‐ring resonators (SSRRs) was utilized to improve the impedance bandwidth of a planar patch antenna. By loading the SSRRs on the superstrate layer, their fundamental resonant modes could be capacitively induced by the radiation patch of the antenna underneath them, respectively. Benefitting from the ultra‐low mutual coupling level between the SSRRs even though...
A novel four port multiple-input-multiple-output (MIMO) antenna at 2.4 GHz ISM band is designed in this paper. The MIMO antenna includes an octangular patch surrounded by a square ring patch. The overall system dimension is 60 × 60 × 1.6 mm3. The antenna operates in a 50 MHz bandwidth centered at 2.44 GHz. A defected ground structure (DGS) for improving the isolation between four ports is proposed...
A dual-band reconfigurable radiation pattern antenna based on active frequency selective surfaces (AFSS) is presented. This antenna is composed of a dual-band omni-directional patch antenna and two cylindrical AFSS with the operating frequencies of 2.45 GHz and 5.2 GHz, respectively. The unit-cells of the proposed AFSS consist of the two metallic crosses connected by a pin-diode vertically. The transmission...
A novel three-dimensional printed dual-wideband complementary antenna with a dual-layer bow-tie dipole structure is proposed for WLAN/WiMAX applications. By using dual-η-shaped feeding structure to feed the dual-layer U-shaped bow-tie dipole, dual-wideband and complementary characteristics can be obtained. In addition, its MIMO system with a defected ground which can obviously improve the diversity...
A frequency reconfigurable patch antenna using 19 reed switches to connect the patch with the ground plane is proposed. Compared with other controlling methods, using reed switches could avoid the need of placing bias and control lines in the vicinity of the radiating elements and the attendant impacts on the antenna radiation performance. Simulated results show that the antenna can be reconfigured...
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