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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06 Jul 2017
TL;DR: In this paper, a simple multiple input multiple output (MIMO) microstrip patch antenna for super wideband applications is proposed, which supports two significant frequency bands having bandwidth of 2.35GHz and 2.1GHz (7.2-9.3GHz).
Abstract: This paper proposes a simple multiple input multiple output (MIMO) microstrip patch antenna for superwideband applications. The antenna has percentage bandwidth of 182.17% for superwideband (14–300)GHz and also supports two significant frequency bands having bandwidth of 2.35GHz (0.1–2.45GHz) and 2.1GHz (7.2–9.3GHz). For all frequencies the antenna input impedance is matched with 50 Ω coplanar waveguide feeding. The antenna is simulated using CST Microwave Studio software. −30dB isolation between MIMO ports and the envelope correlation coefficient value is below 0.1 makes the antenna an ideal candidate of MIMO superwideband antenna. Furthermore 53dB front to back ratio and 33dB directivity with more than 88% radiation efficiency is found in simulation result. Integration of this antenna with microwave integrated circuits is also possible. Design details and results are presented.
TL;DR: In this article, a psi-shaped long-wire antenna was proposed for chip-to-multi-chip (S2M) communication scenario for a distance of 20mm, with a peak transmission gain of −19.5 dB and a 3 dB bandwidth of 11.8 GHz.
Abstract: A novel type of wide-band long-wire antenna is presented for 60 GHz wireless on-board chip-to-multi-chip applications using a vertically polarised electric field. The psi-shaped structure is devised to match the antenna input impedance to 50 Ω and to increase the front-to-back ratio by placing two bent 0.5λ eff lines parallel to the original long-wire antenna, which resulted in improved realised gain and can be directivity compared to those of a conventional baseline structure. The psi-shaped long-wire antenna shows a peak gain of 10.2 dBi, an end-fire gain of 7 dBi, a 22% impedance bandwidth (52–65.2 GHz), and a 25.8% 3 dB gain bandwidth (56–74 GHz) in an area of 3.1 × 105 mm2. This study presents the proposed antenna for an on-board chip-to-multi-chip communication scenario for a distance of 20 mm, with a peak transmission gain of −19.5 dB and a 3 dB bandwidth of 11.8 GHz (=19.6%), which ranges from 55.4 to 67.2 GHz.
TL;DR: In this article, a novel design for circularly-polarized (CP) arrays is proposed, which is composed of dual CP slot antenna elements arranged in a face-to-face configuration.
Abstract: A novel design for circularly-polarised (CP) arrays is proposed. The proposed array is composed of dual CP slot antenna elements arranged in a face-to-face configuration, and they are simultaneously excited through a slot line. By properly controlling the excitation amplitudes and phases of the two radiating elements, the cross polarisation and back radiation of the array can be effectively reduced. From the measured results, the proposed array can give an axial ratio of lower than 1 dB and a front-to-back ratio of higher than 12 dB within a 10 dB-return-loss bandwidth of >16%. Simulation results obtained with high frequency structure simulator (HFSS) also agree well with the experimental data.
Journal Article•
TL;DR: In this article, a new concept of feeding technique is adopted to implement a slot antenna array, where four radiating slots cut on patch for radiating antenna, all slots are cut symmetrically.
Abstract: In this paper, SIW based antenna array are proposed ,a new concept of feeding technique is adopted to implement a slot antenna array .There are four radiating slots cut on patch for radiating antenna.In this all slots are cut symmetrically.A H slot cut on centre of patch. By feeding technique, we excite H slot by which four slots are excited.By this technique we improve bandwidth ranging from 8.09 Ghz to 8.9 Ghz (9.31%)and front to back ratio is approx. 17 dB and peak gain is better than 4 dB.