A Size-Reduced, 15-Element, Planar Yagi Antenna
IEEE Transactions on Antennas and Propagation
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.
Smith, Lauryn P., James C. Howell, Sungkyun Lim.
"A Size-Reduced, 15-Element, Planar Yagi Antenna."
IEEE Transactions on Antennas and Propagation, 69 (4): 2410-2415: IEEE Xplore.
doi: https://doi.org/10.1109/TAP.2020.3019564 source: https://ieeexplore.ieee.org/document/9184266