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A novel planar dual-band circular polarization (CP) monopole antenna is proposed. By introducing an inverted L-shaped strip-sleeve shorted to the ground plane, the proposed dual-band CP antenna design easily achieves impedance bandwidths ( ) approximating 1932/339 MHz and 3-dB axial-ratio bandwidths approximating 250/360 MHz in 2.4/5.2-GHz wireless local area networks (WLANs),...
A novel planar dual-band monopole antenna with circular polarization (CP) operation is proposed. By appropriately introducing an inverted L-shaped strip-sleeve shorted at the ground plane, the proposed dual-band CP design can easily be achieved with the impedance bandwidth (RL ≧10 dB) of about 1932 / 339 MHz and the 3 dB axial-ratio (AR) bandwidth of about 250 / 360 MHz for 2.4 / 5.2 GHz wireless...
A dual-band dual-polarized patch antenna is proposed for WiMax and WLAN systems. Impedance bandwidths of 7.5% and 9.6% can be achieved at 3.6 GHz and 5.2 GHz, respectively. The asymmetrical U-slot has been used to generate the orthogonal modes for circular polarization at 3.6 GHz with a 3dB axial ratio bandwidth of 0.7%, and the linear polarization is obtained by cutting a symmetrical U-slot on the...
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