A Size-Reduced, 15-Element, Planar Yagi Antenna

Document Type

Article

Publication Date

9-1-2020

Publication Title

IEEE Transactions on Antennas and Propagation

DOI

10.1109/TAP.2020.3019564

ISSN

1558-2221

Abstract

A size-reduced, 15-element Yagi antenna is presented in a planar shape. T-shaped, top loadings are implemented to reduce the lengths of the individual antenna elements. The Yagi antenna achieves a 45% reduction in the element lengths compared with a traditional, λ /2 full-sized Yagi antenna. The proposed antenna is simulated, and a prototype is built for measurement validation. The −10 dB impedance bandwidth is 70.0 MHz (4.6%), and the measured realized gain is 13.3 dBi. Compared with the full-sized Yagi antenna, the bandwidth of the proposed, size-reduced Yagi antenna is similar. In addition, a minor difference in realized gain in comparison to the full-sized Yagi is observed when more than two parasitic elements are added. This difference in realized gain between the full-sized Yagi and the size-reduced Yagi is then explained by an approximate contribution of 0.2 dB per each added parasitic element. The measurements and simulations are in good agreement.

Comments

© 2020 IEEE

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