Abstract—A high-directivity patch antenna with broadside directivity is attractive, since a narrow beam can be obtained without the need of using an array of antennas. Therefore, the solution becomes simpler as there is no need for a complicated feeding network. In this sense, this paper presents a novel patch antenna design with high directivity in the broadside direction by using genetic algo...

On 8 January 2022, an M S 6.9 earthquake occurred in the Menyuan county, Qinghai province at northeastern margin of Tibetan Plateau. A dense observatory network consisting accelerographs and intensity meters has obtained many acceleration recordings this region, which previously had only a few strong motion recordings. Using data recorded by 141 micro-electro mechanical system (MEMS)-based with...

Abstract This paper presents a joint analysis of instrumental and macroseismic data regarding the 19 July 2019, Greece M w 5.1 earthquake occurred west Athens. ruptured blind, south-dipping normal fault, 23 km WNW center Athens, while its relocated epicentre lies in close vicinity to one 1999 6.0 earthquake. The maximum intensity 2019 mainshock reached IEMS98 = 7.5. Scarce damage intensities up...

Abstract High directivity low side-lobe antennas, when used for outdoor applications, significantly mitigate co-channel interference and enhance the data carrying capacity of a bandwidth allocation. For lastmile applications it is recommended that highly sectored cellular hubs, which incorporate high directivity, low side lobe antennas, be used to provide urban connectivity. Such hubs would ope...

NTT DOCOMO Technical Journal Vol. 13 No. 4 ©2012 NTT DOCOMO, INC. Copies of articles may be reproduced only for personal, noncommercial use, provided that the name NTT DOCOMO Technical Journal, the name(s) of the author(s), the title and date of the article appear in the copies. *1 Directivity: One of the radiation characteristics of an antenna. The direction characteristic of the radiation str...

SUMMARY A directional array radiator is presented, the aim of which is to enhance the sound of the television in a particular direction and hence provide a volume boost to improve speech intelligibility for the hard of hearing. The sound radiated by the array in other directions is kept low, so as not to increase the reverberant level of sound in the listening room. The array uses 32 loudspeake...