Research Article

Design of Planar Microstrip Ultrawideband Circularly Polarized Antenna Loaded by Annular-Ring Slot

Figure 11

The measured CP radiated patterns on xoz plane and yoz plane, respectively. (a) 6 GHz. (b) 6.5 GHz. (c) 7 GHz. The solid lines correspond to the yoz plane, while the dashed lines correspond to the xoz plane.
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(b)
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