3d Printed Large Bandwidth New Yagi-Uda Antenna

Abstract

A new design of a printed Yagi-Uda antenna is presented. The main idea to be directive and large bandwidth is to replace the driver element associated with its reflector by a directional curved disk monopole and the directors by flat disks monopole. It requires the use of a ground plane to simplify feeding. The study of configuration of the dimensions, the number and dispositions of the directors elements allows a return loss less than −10 dB over 20% bandwidth centered at 5 GHz. Also, a high gain of 13 dBi is obtained with a maximum radiation direction at 26 • elevation from the azimuth due to a limitation of the ground plane. This gain remains superior to 10 dBi over the bandwidth. The simulation results are in good agreement with the measurements for return losses, radiation patterns, and gain.

Compact and Broadband Uniplanar Microstrip Antenna for Endfire Radiation

“…Generally, Yagi antennas and LPDAs are used for higher gain and higher BW, respectively. The gain of Yagi antenna is increased by adding multiple directors [7][8][9][10]. A 7-element Microstrip Line (MSL) fed Yagi-Uda antenna with size 2.3λ 0 × 3.11λ 0 × 0.030λ 0 is reported to achieve > 10 dBi gain and > 20 dB Front to Back ratio (F/B) [7].…”

“…To further increase the gain, a stacked multilayer configuration of printed Yagi antenna of size 1.55λ 0 ×1.55λ 0 ×0.56λ 0 is reported to achieve 11 dBi gain and 14% fractional bandwidth [9]. A 6element Yagi with a curved disk monopole as driven element and flat disk monopole as directors provides 20% BW and more than 10 dBi gain [10]. Since feed structure also plays a crucial role for wideband impedance matching, various feed structures are reported in [11][12][13][14][15][16][17][18][19][20] for Yagi-Uda antennas to increase the bandwidth.…”