Telfor JournalPub Date : 2019-01-01DOI: 10.5937/telfor1902096r
I. Radnović, B. Jokanović, A. Boryssenko
{"title":"Improved model of the circularly polarized patch antenna array at 24 GHz for radar applications","authors":"I. Radnović, B. Jokanović, A. Boryssenko","doi":"10.5937/telfor1902096r","DOIUrl":"https://doi.org/10.5937/telfor1902096r","url":null,"abstract":"The paper presents the improved design of the novel circularly polarized patch antenna array operating at ISM band 24.05-24.25 GHz. The antenna array consists of 24 identical truncated patches which are serially fed through the microstrip line. The antenna is a travelling-wave array with exponential power distribution which provides very good side lobe suppression of 30 dB in the entire operating band making it suitable for automotive radar applications. Simulated axial ratio is below 3dB in the range (24.06-24.26) GHz, the antenna gain is greater than 17.2 dBi, cross polarization is better than 15 dB and return loss is greater than 15 dB in the entire ISM band.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71139713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Telfor JournalPub Date : 2019-01-01DOI: 10.5937/TELFOR1901025M
Vladimir Maksimovic, J. Todorovic, B. Jaksic, M. Petrovic, P. Spalević
{"title":"The impact of successive B frames on TV signal using different compression techniques and video resolution","authors":"Vladimir Maksimovic, J. Todorovic, B. Jaksic, M. Petrovic, P. Spalević","doi":"10.5937/TELFOR1901025M","DOIUrl":"https://doi.org/10.5937/TELFOR1901025M","url":null,"abstract":"The aim of this paper is to examine the impact of successive B frames using compression techniques (H.264 and H.265) and resolution (4K, 2K, Full HD and SD) when changing their quality in a television system. The analysis was done for a case when the number of successive B frames in the Group of Pictures (GOP) was B = 0 and B = 4. The results obtained for analysis parameters: compression ratio, Peak Signal Noise Ratio (PSNR), bitrate, P frames and B frames are presented by tables and graphics, based on which conclusions were made.","PeriodicalId":37719,"journal":{"name":"Telfor Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71139562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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