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This paper reviews a couple of structures of circularly polarized waveguide antennas using L-shaped probe. In such antennas, the cross polarization gets increased with an increase in frequency at off-boresight direction. To avoid this effect, an effect of a parabolic short wall is discussed and is compared with the short wall with four poles.
This paper presents the study and the design of the rectenna (antenna integrated with rectifying circuit) operating at the WLAN band of 2.45 GHz. The polarization diversity antenna fed by two linear electric probes is chosen for receiving RF power from the WLAN. The isolation of the proposed polarization diversity antenna is improved by inserting an annular rectangular-ring slot on the radiating plate...
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