Topic
Front-to-back ratio
About: Front-to-back ratio is a research topic. Over the lifetime, 292 publications have been published within this topic receiving 3314 citations.
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TL;DR: In this article, a vertically multilayered Yagi antenna is presented, which consists of a dual-element folded dipole, three latticed director arrays and a ground plane.
Abstract: A vertically multilayered Yagi antenna is presented The antenna consists of a novel dual-element folded dipole, three latticed director arrays and a ground plane The dual-element folded dipole is composed of a pair of folded dipoles which are fed by an internal feedline It mainly makes the proposed Yagi have a bandwidth of 708% (134–283 GHz) for a return loss (RL) > 10 dB The latticed director arrays and the ground plane are utilised to enhance the gain performance of the multilayered Yagi antenna The measured and the simulated results indicate that a gain better than 108 dB and a front-to-back ratio (FBR) higher than 20 dB can be obtained in the frequency range 17–283 GHz which covers the second generation 2G/3G/long-term evaluation (LTE) application
6 citations
TL;DR: In this article, a point source approximation algorithm for calculating the near and far fields of Yagi-Uda antennas for the evaluation of the human radiation exposure zone boundaries is presented.
Abstract: A point source approximation is shown to be an efficient algorithm for calculating the near and far fields of Yagi-Uda antennas for the evaluation of the human radiation exposure zone boundaries. Results of a 12-element Yagi-Uda antenna compared to numerical electromagnetics code show that the modelled antenna field strength and front-to-back ratio were calculated to within 0.10 and 0.34 dB, respectively, while the occupational and general public exposure zone boundary distances were calculated to within 0.23 and 0.14 m, respectively.
6 citations
TL;DR: In this article, a backfire bifilar helical antenna with a resistor is proposed to improve the radiation characteristics of the antenna, which achieves an excellent front-to-back ratio and axial ratio, while maintaining inherent absolute gain.
Abstract: In order to improve the radiation characteristics of a backfire bifilar helical antenna, a means of terminating the arm ends with a resistor is numerically and experimentally investigated. Owing to the reduction of reflected current, the present backfire helix realises an excellent front-to-back ratio and axial ratio, while maintaining inherent absolute gain.
6 citations
01 Dec 2011
6 citations