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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01 Dec 2019
TL;DR: In this article, a compact uniplanar microstrip antenna (UMSA) for endfire radiation pattern is designed with simple feed, which is fed by a simple unbalanced coaxial feed.
Abstract: A compact uniplanar microstrip antenna (UMSA) for endfire radiation pattern is designed with simple feed. Size of the antenna is compressed by meandering the driven element. It is fed by a simple unbalanced coaxial feed. The antenna characteristics are analyzed by varying the antenna dimensions. The fabricated antenna has size of 0.38λo x 0.11λo at 2.46 GHz. Experimental results of the antenna agree with simulated ones. It provides gain of 5.5 dBi and front to back ratio (F/B) of 12.7 dB. The proposed compact UMSA can be easily integrated with printed circuit boards.
Patent•
06 Mar 2020
TL;DR: In this paper, the authors proposed a directional antenna with a high front-to-back ratio, which consists of an electric dipole antenna unit and a magnetic antenna unit arranged in parallel.
Abstract: The invention provides a directional antenna with a high front-to-back ratio. The directional antenna comprises an electric dipole antenna unit and a magnetic dipole antenna unit which are arranged inparallel. The magnetic dipole antenna unit is arranged behind the electric dipole antenna unit, and can be excited to form an electromagnetic wave with the same frequency as the signal wave emitted by the electric dipole antenna unit; and the directional diagram of the electromagnetic wave excited by the magnetic dipole antenna unit and the directional diagram of the signal wave emitted by the electric dipole antenna unit are complementary to form electric screen and complementary electric screen relationship, so that directional radiation is formed through array antenna directional diagram synthesis by utilizing a directional diagram superposition principle, and the front-to-back ratio of the antenna is improved. The directional antenna with the high front-to-back ratio is simple in structure and easy for mass production, and the front-to-back ratio of the antenna is effectively improved while the antenna is ensured to have good directional radiation characteristics.
TL;DR: The analysis was focused on the best tradeoffs between concentration of conductor, gain and front to back ratio, and showed that more than 50 % of conductor can be removed without significant gain reduction.
Abstract: This paper presents a meshed microstrip patch antenna for UHF band radio communications. Meshed elements allow making antenna flexible, light and more suitable for wearable devices. Several antennas, intended for PMR446 band with different meshing configurations, have been designed. Un-meshed, semi-meshed and fully meshed microstrip patch antennas have been compared. The analysis was focused on the best tradeoffs between concentration of conductor, gain and front to back ratio. Results below are showing that more than 50 % of conductor can be removed without significant gain reduction. In some cases the meshing gives a reduction of back radiation. The meshed antenna has smaller dimensions in comparison with the unmeshed antenna on the same frequency. DOI: http://dx.doi.org/10.5755/j01.eee.21.4.12778
03 Apr 2005
TL;DR: Two printed Lotus antennas are designed for wideband personal wireless communication systems that exhibit wide bandwidths, small in size, wide beamwidth, high front to back ratio, low cross polarization levels and relatively high gain.
Abstract: Two printed Lotus antennas are designed for wideband personal wireless communication systems. The presented antennas exhibit wide bandwidths (60%), small in size, wide beamwidth, high front to back ratio, low cross polarization levels and relatively high gain.
13 Nov 2020
TL;DR: In this article, a magneto-electric (ME) dipole antenna is presented, which owns the characteristics of low cross polarization level and high front-to-back ratio (FBR) for the Sth-generation (5G) indoor communications.
Abstract: A novel magneto-electric (ME) dipole antenna is presented in this paper, which owns the characteristics of low cross polarization level and high front-to-back ratio (FBR) for the Sth-generation (5G) indoor communications is described. By dividing the conventional patches into two pairs of rectangle patches and four pieces of parasitic patches, the current which produces cross-polarization can be offset. Furthermore, the vertical fence can effectively widen the beamwidth of antenna. Experiment results demonstrate that a broad frequency bandwidth of 3.3-4.2 GHz (24%) can be achieved for 5G communications. Besides, a cross - polarization level below −20 dB and a FBR level of approximately 26 dB in the operating bands. Noting that a wide beamwidth of 100° for E-plane and H-plane is also obtained.