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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.


Papers
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01 Jan 2006
TL;DR: In this paper, the EBG(electromagnetic band-gap) high-impedance surface structure is utilized as a high-IMpedance ground plane for slots on rectangular waveguide to raise the front to back(F/B) ratio.
Abstract: This paper deals with the method to raise the front to back(F/B) ratio on the pattern for the slots antenna of rectangular waveguideThe EBG(electromagnetic band-gap) high-impedance surface structure is utilized as a high-impedance ground plane for slots on rectangular waveguide to raise the front to back(F/B) ratio,and detailed analysis is made to study the influence of EBG high-impedance surface characteristic on the radiation properties of the slots array antenna of rectangular waveguide by using the simulation methodThe electric parameters of the designed example antenna are measuredThe experimental results show that this method is effective

1 citations

Proceedings ArticleDOI
12 Apr 2019
TL;DR: An antenna with a unidirectional radiation pattern for level sensing in a storage tank is presented in this article, which consists of a bidirectional radiator and a multilayer absorber.
Abstract: An antenna with a unidirectional radiation pattern for level sensing in a storage tank is presented. The proposed antenna configuration consists of a bidirectional radiator and a multilayer absorber. The frequency of operation ranges from 300 to over 1500 MHz with a reflection coefficient of less than −10 dB. By placing the multilayer absorber behind the bidirectional radiator, a stable unidirectional radiation pattern over the frequency range from 300 MHz to 900 MHz can be achieved. The absorber with 3 layers forms a pyramidal shape to absorb the signal at 3 difference frequency ranges namely around 300 MHz, 600 MHz and 900 MHz. This multilayer absorber is used to improve radiation pattern of the slot antenna by absorbing and reflecting the back lobe over the frequency of interest. The front to back ratio has a maximum value of 9.8 dB at 800 MHz.

1 citations

Proceedings ArticleDOI
14 Nov 2013
TL;DR: In this paper, a volumetric miniaturized AMC block is designed to simulate an infinite periodic structure, and a block of nine aligned layers is then simulated to validate the performance of the AMC block.
Abstract: This paper is dedicated to the study of volumetric MSRR-based AMC structure. The characteristics of a single MSRR unit cell are investigated; and a volumetric miniaturized AMC block is then designed. In order to validate the approach used to simulate an infinite periodic structure, a block of nine aligned layers is then simulated. The next step is to add a printed dipole antenna as an application to validate the performance of the AMC block. The results are very excellent and promising if compared with the simple dipole antenna as an enhancement of 5 dB is achieved considering the directivity. The front to back ratio is found to be about 20 dB.

1 citations

Journal ArticleDOI
01 Mar 2020
TL;DR: The four elements of Quasi‐Yagi‐Uda antennas (QYUA) are introduced based on the diversity technique to reduce the interference between the elements to solve the problems of OCA designs.
Abstract: This article presents a solution for the low gain and the poor efficiency of the on‐chip antennas (OCA). The four elements of Quasi‐Yagi‐Uda antennas (QYUA) are introduced based on the diversity technique to reduce the interference between the elements. In addition, these antennas achieve high isolations between them due to the use of reflector for each antenna. The QYUA is selected to improve the radiation properties of the end‐fire radiator in the millimeter‐wave range for on‐chip systems. The proposed MIMO antenna is used for the point to point communications. The complementary metal‐oxide semiconductor with 180 nm standard is used in the antenna design with six metal layers. The QYUA combines three parts (driven element, reflector, and director); the driven consists of two meander lines fed by coplanar‐slot and operates as a dipole, the reflector is an arc likes a semicircle to prevent the back radiation and increase the front to back ratio, and the director is a meander line to directive the radiation into the proposed direction (front end‐fire direction). All MIMO parameters such as envelope correlation coefficient, channel capacity loss, diversity gain, and total active reflection coefficient in addition to the different configurations of the MIMO are presented. All results are verified by computer simulation technology and high‐frequency structure simulator. The contribution of this article is the MIMO antenna design for point to point communications to serve multigiga communications systems with high data rate and high gain. This MIMO system is considered here to solve the problems of OCA designs.

1 citations

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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202116
202026
201933
201823
201721
20169