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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 authors show how the design of integrated arrays can significantly benefit from Planar Circularly Symmetric (PCS) Electromagnetic Band Gap (EBG) structures.
Abstract: This paper shows how the design of integrated arrays can significantly benefit from Planar Circularly Symmetric (PCS) Electromagnetic Band Gap (EBG) structures. Using this technology, a phased array that scans up to 40o in one dimension and that is characterized by relatively large bandwidth (BW ≈ 15%) is designed, manufactured and tested. The specific advantages coming from the use of PCS-EBGs are two fold. On one hand the losses associated to surface waves are significantly reduced. On the other hand each element of the array has a larger effective area that leads to a higher gain for the complete array when compared with a standard technology. Additional benefits are the low cross-polarization levels, the good front to back ratio, considering that the antenna does not include a backing reflector, and the low profile.
Proceedings ArticleDOI
01 Jul 2018
TL;DR: This paper presents the improvement of the directivity of a small planar dipole antenna (SPDA) operating in X band at 10 GHz with a crescent-shaped corner reflector using particle swarm optimization.
Abstract: This paper presents the improvement of the directivity of a small planar dipole antenna (SPDA) operating in X band at 10 GHz with a crescent-shaped corner reflector using particle swarm optimization. The corner reflector is designed by using Epsilon Negative Medium concept. The simulation results using High Frequency Structure Simulator (HFSS) show that, by particle swarm optimization, the gain of small planar dipole antennas with crescent-shaped Corner Reflector increases by 4.6639 dB. The mainbeam is in the direction of theta =phi = 0 degree, with Front to Back Ratio is 5.7318. The return loss of a SPDA is lower than -20 dB by -22.5936 dB.
Journal ArticleDOI
20 Apr 2021
TL;DR: In this paper, a stacked patch linear array with asymmetric configuration is proposed, which is capable of scanning the beam in ±40° with less than 1.34 dB scanning loss.
Abstract: The backward radiation is a critical problem that may cause breakdown of the front-end circuits that are integrated behind the antenna. Thus, antennas having high Front to Back Ratio (FBR) are required. For phased arrays, the back lobe suppression is required for all scanning angles at all frequencies of the band. In this work, a stacked patch linear array with asymmetric configuration is proposed. It is capable of scanning the beam in ±40° with less than 1.34 dB scanning loss. Due to the usage of probe-fed stacked patches as the antenna elements, impedance matching in 8-10 GHz is achieved. More than 30 dB FBR is obtained for broadside radiation. It is above 20 dB when the beam is steered to θ = 40°. This is valid for all frequencies of the band. A prototype is fabricated and measured. Higher than 38 dB FBR is observed. With its broadband, high FBR and low scanning loss, the proposed asymmetrical stacked patch phased array is suitable as radar and base station antenna.
Journal ArticleDOI
TL;DR: A Substrate Integrated Isosceles Trapezoid extended ground antenna with dual band characteristics is presented, to effectively enhance the bandwidth performance and improved front to back ratio which are required for X-band applications.
Abstract: A Substrate Integrated Isosceles Trapezoid extended ground antenna with dual band characteristics is presented. Simultaneous achievement of high bandwidth, gain and front to back ratio is challenging in the X-band applications. A slot and isosceles trapezoid structure is placed on the top plane of the cavity for radiation. The half mode is realized by splitting the full mode Substrate Integrated Waveguide along the perfect magnetic conductor walls for size reduction. In the open edge of the patch, two rectangular slits are loaded, to effectively enhance the bandwidth performance and improved front to back ratio which are required for X-band applications. The proposed antenna provides a gain of 7.4 dB with front to back ratio more than 10 dB throughout the bandwidth of 20.14%. This dual band antenna operates at 8.6 GHz and 10.19–12.69 GHz.
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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202116
202026
201933
201823
201721
20169