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A planar Yagi-Uda antenna using the parabolic reflector is designed and compared to that of using the conventional straight reflector. Both antennas are designed to have the same performance. Simulation results show that the parabolic reflector design can reduce the occupied antenna area by about 29.4% as compared to that of the straight reflector design, while the antenna directivity and efficiency...
An experiment is performed on a thin dielectric substrate for the compact printed Yagi type antenna described theoretically in [1]. This time the SMA connector at the feed is taken into design considerations. Measured results show that this implemented antenna has a high directivity of 7.3 dBi, a front-to-back ratio of 11.6 dB, a cross-polarization level of −33.5 dB, and 3-dB beamwidths of 73° and...
A novel planar reconfigurable antenna on a thin dielectric substrate based on the Yagi-Uda design rationale is proposed. This design not only can provide the end-fire beam scan with high directivities (at least 7.6 dBi) over a 60?? coverage but also can operate at a fixed frequency without frequency shift when beam scans. The efficiencies of the antenna in all scanning scenarios are better than 78...
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