scispace - formally typeset
Search or ask a question
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.


Papers
More filters
DOI
01 Jun 1984
TL;DR: In this paper, the effects of loaded termination on a tapered backfire bifilar helical antenna are numerically and experimentally investigated over a wide frequency range of ratio 1:1.7.
Abstract: Effects of loaded termination on a tapered backfire bifilar helical antenna are numerically and experimentally investigated over a wide frequency range of ratio 1:1.7. With the help of the scalar potential for a lumped resistance at the arm end, the current distribution along the helical wire is determined. It is found that nearly constant input impedance, high front-to-back ratio and low axial ratio are realised. The inherent absolute gain is not significantly deteriorated in spite of the use of a terminal resistor. The existence of the phase centre is also demonstrated, and the phase centre location is presented as a function of frequency.

8 citations

Journal ArticleDOI
TL;DR: In this paper, the authors describe a technique to suppress the surface wave propagation modes and increase the gain of a rectangular microstrip antenna fed by a coaxial probe using a new electromagnetic band gap structure (EBG).
Abstract: This paper describes a technique to suppress the surface wave propagation modes and consequently to increase the gain of a rectangular microstrip antenna fed by a coaxial probe using a new electromagnetic band gap structure (EBG). The EBG structure consists of perforated cylindrical holes periodically distributed around the perimeter of two ellipses with different radius. The antenna design and the parametric analysis of the band gap structure and their integration are carried out. The performance of the proposed antenna using a full-wave method are presented and compared to conventional microstrip antenna operating at the same frequency. Obtained results show a gain enhancement of 1.9 dB in the E-plane.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a pseudo-omnidirectional antenna that is appropriate for wide beam applications, e.g. handheld devices, along with a reduced back radiation that suits wearable applications is presented.
Abstract: This Letter presents a novel pseudo-omnidirectional antenna that is appropriate for wide beam applications, e.g. handheld devices, along with a reduced back radiation that suits wearable applications as well. The design consists of a horizontal omnidirectional antenna placed on a proposed artificial magnetic conductor (AMC) surface that enhances the gain in the broadside direction, reduces the back radiation, and enables good radiation in the side directions. A 5 GHz folded dipole on a 2 × 2 AMC array surface is designed and characterised. Simulations and measurements, which are in a very good agreement, show that the radiation has a heart-shaped pattern, with a front to back ratio of >13 dB, a front to side ratio of 230°.

7 citations

Journal ArticleDOI
TL;DR: In this paper, a dual-polarized planar antenna with compact structure for 2.4GHz WLAN and 2.5GHz Long Term Evaluation (LTE2500) base stations is proposed.
Abstract: A low-profile dual-polarized planar antenna with compact structure for 2.4GHz Wireless local area network (WLAN) and 2.5GHz Long term evaluation (LTE2500) base stations is proposed. A combination of a planar radiator and compact Artificial magnetic conductor (AMC) reflector is utilized to achieve a full planar structure without adding extra matching circuit, an extremely low-profile of 0.127 wavelength, as well as a high front to back ratio (F/B) of 25dB. The antenna is fabricated to test the performance such as S-parameters, radiation patterns and peak gain. Reasonable results show the suitability of the proposed antenna for 2.4GHz WLAN and LTE2500 applications.

7 citations

Proceedings ArticleDOI
19 Feb 2019
TL;DR: In this article, a high gain optically transparent microstrip patch antenna for K band (18 GHz-27 GHz) satellite communication has been proposed and investigated in order to make sure the property of optical transparency of the antenna, Optically transparent materials have been chosen for all the layers of the microstrip antenna.
Abstract: A high gain optically transparent microstrip patch antenna for K band (18 GHz–27 GHz) satellite communication has been proposed and investigated in this paper. In order to make sure the property of optical transparency of the antenna, optically transparent materials have been chosen for all the layers of the microstrip patch antenna. Indium Tin Oxide (ITO) film is opted for the radiating patch and ground plane where the substrate is made of pyrex glass (lossy) (Ɛ r = 4.82 and tanδ = 0.0054). The proposed transparent antenna operates at center frequency of 24.8 GHz ranging from 17.625 GHz to 30.523 GHz that covers the entire K band of satellite communication. The transparency property of the patch antenna is useful to minimize the shadowing effect of the solar antenna as well as helpful to guarantee the maximum uses of satellite surface area. The proposed antenna has high IEEE gain of 12.36 dB and directivity of 13.38 dBi including efficiency of 92.38%. It also possesses very wide bandwidth (12.898 GHz), high front to back ratio (16.699 dB) and very good VSWR (1.0566) at center operating frequency.

7 citations

Network Information
Related Topics (5)
Dipole antenna
38K papers, 513.8K citations
70% related
Antenna (radio)
208K papers, 1.8M citations
70% related
Microstrip antenna
43.9K papers, 604.4K citations
68% related
Electromagnetic field
39.1K papers, 611.8K citations
64% related
Microwave
48.3K papers, 637.8K citations
64% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202116
202026
201933
201823
201721
20169