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A new designed single-fed broadband circularly polarised dipole antenna with simple structure is presented. The antenna is composed of a horizontal electric dipole and an equivalent magnetic dipole realised by two vertical patches quarter-wave shorted at the bottom. The electric dipole and equivalent magnetic dipole are positioned along the same axis to excite the orthogonal radiation fields with...
A dual rhombic loop antenna with double parasitic loops to increase the bandwidth of circular polarization operation is proposed. The gap position of each loop controls the sense of circular polarization. The original dual rhombic loop radiates a CP wave at a lower frequency while the parasitic loop produces CP radiation at a higher frequency. A combination of the two frequencies leads to a bandwidth...
A dual-loop printed antenna fed by coplanar strip-line (CPS) with high gain is proposed. This antenna not only has the high gain of 10.13 dB, but also has the low cross polarization level less than -30 dB, which can be used in a low power density application. Furthermore, the broad beam width with more than 62 degrees HPBW in the E plane is able to avoid the precise main beam alignment. For measuring,...
A compact semi-elliptical patch antenna fed by a tapered coplanar waveguide (CPW) is presented. The simulated and experimental results demonstrate that the antenna possesses the desirable super-wideband (SWB) characteristics, achieving a ratio bandwidth of 19.7:1 for VSWRles2, and exhibits a nearly omni-directional radiation pattern, while its area is only about 0.15 lambda1 times 0.2 1 lambda1, where...
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