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 published on a yearly basis
Papers
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08 Dec 2008
TL;DR: An antenna for enhancing isolation characteristic and front to back ratio characteristic by using a decoupling element is described in this article, which includes a reflection plate, a radiation element disposed on the reflection plate and a decouple element configured to surround the radiation element with loop shape.
Abstract: An antenna for enhancing isolation characteristic and front to back ratio characteristic by using a decoupling element is disclosed The antenna includes a reflection plate, a radiation element disposed on the reflection plate, and a decoupling element configured to surround the radiation element with loop shape
6 citations
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22 May 2019TL;DR: In this paper, a dual-polarized antenna element for Advanced LTE/5G base station for MIMO application is presented, which consists of a pair of orthogonal planar bow tie dipoles fed with two semi ridge cables and a reflector ground plane with air dielectric.
Abstract: In this literature, a small profile wide band, dual polarized antenna element for Advanced LTE/5G base station for MIMO application is presented. The design consists of a Pair of orthogonal planar bow tie dipoles is fed with a two semi ridge cables and a reflector ground plane with air dielectric are used to obtain the two linear polarizations. The designed antenna is operating in the frequency band of LTE2400 and sub 6GHz (3.3-4.0GHz) band for 5G. A single antenna works for both Advance LTE/5G for MIMO applications. From the simulation results the single antenna element with notch on the dipole arms yields an $\vert S11\vert$ less than-15dB bandwidth of 66.66% (2-4 GHz), HPBW of 71.5 degrees and a gain of 7.5 to 9.3dBi, Front to Back Ratio(FBR) is better than 18.5dB, with Isolation of 35dB,Cross Polarization Level of 38dB with symmetrical radiation pattern. The overall height of the antenna is 34mm with radome and the design is simple and easy to fabricate. Thus, this new design is an ideal candidate for the new 5G Mobile Base Applications.
6 citations
25 Oct 2011
TL;DR: In this paper, the effect of stepped edge corrugations on the front-to-back ratio (F/B ratio) improvement for the antipodal DETSA was investigated.
Abstract: We investigate the effect of stepped edge corrugations on the front-to-back ratio (F/B ratio) improvement for the antipodal DETSA. Three types of corrugation configurations with different combinations of slit length are investigated. The results revealed that the improvement in F/B ratio is directly related to the arrangement in corrugation configurations.
6 citations
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01 Dec 2011
TL;DR: A novel portable wireless monitoring system for sleep apnoea diagnosis is presented in this paper and multiple passive BPFs at the RF front-end are adopted to select the desired signals, in order to minimize the power consumption and cost of the overall system.
Abstract: A novel portable wireless monitoring system for sleep apnoea diagnosis is presented in this paper. The presented system is composed of two main parts. The first is an on-body sensor system; the second is a reader and base station. In order to minimize the physical size of the on-body sensors and to avoid interference with 2.4 GHz wireless applications, the system is designed to operate in the 5.8 GHz ISM band. Each on-body sensor system consists of a physiological signal detection circuit, an analogue-to-digital convertor (ADC), a microcontroller (MCU), a transceiver, a channel selection bandpass filter (BPF) and a narrow band antenna. The reader uses 6 narrow band antennas, 6 channel selection BPFs, a transceiver and a MCU. Instead of dealing with channel selection at baseband, multiple passive BPFs at the RF front-end are adopted to select the desired signals, in order to minimize the power consumption and cost of the overall system. Moreover, a 5.8 GHz circular patch antenna is simulated and measured. Both the simulated return loss of 21 dB and the measured one of 26 dB have a 10 dB bandwidth of 140 MHz which satisfies the requirements for the reader system. The measured antenna gain from 5.725 GHz to 5.875 GHz is more than 7.5 dBi. Furthermore, the 3 dB beam-width is about 60° and the front to back ratio is 14 dB.
6 citations
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TL;DR: In this paper, a planar end-fire antenna with enhanced front-to-back ratio (FTBR) and miniaturized size in its endfire direction is investigated in this communication.
Abstract: A planar endfire antenna with enhanced front-to-back ratio (FTBR) and miniaturized size in its endfire direction is investigated in this communication. The antenna mainly consists of two closely placed dipoles with a small spacing of $0.04~\lambda _{0}$ . By using a novel topology, the desired phase difference between the two dipoles is obtained to improve the peak FTBR up to 30 dB and the peak gain to 6.5 dBi. Furthermore, a parasitic strip and a series of grooves are introduced to the antenna to adjust the phase difference and the current distributions of the two dipoles, effectively expanding the 20 dB FTBR bandwidth from 2.3% to 13.3%. Consequently, the antenna with an overall size of $0.161\,\,\lambda _{0} \times 0.43 \lambda _{0}\times 0.009\lambda _{0}$ obtains an overlapping bandwidth ( $\vert \text {S}_{11}\vert \lt - 10$ dB and FTBR >20 dB) of 8.3%, an average gain of 5.1 dBi, and a high efficiency of about 90%.
6 citations