International Journal of Advanced Trends in Engineering, Science and Technology最新文献

{"title":"Effective Aperture of Antenna Directivity Bounding and its Radiation Aperture","authors":"MD Javeed Ahammed, Rohtas Singh, M. Ram","doi":"10.22413/IJATEST/2018/V3/I5/1","DOIUrl":"https://doi.org/10.22413/IJATEST/2018/V3/I5/1","url":null,"abstract":"In this paper, among the earliest type of antennas in production was aperture type. These antennas were rigid and consisted of a parabolic, paraboloidal, cylindrical, or spherical shape. A major limitation of this type of antenna stems from the fact they could only give one particular radiation pattern, and if one wanted to scan the signal from one point to another, then the whole structure had to be moved which meant the satellite had to be realigned. This major shortcoming led to the development of the more costly phased array technology and other technologies where beam scanning was exploited. The aperture is defined as the area, oriented perpendicular to the direction of an incoming radio wave, which would intercept the same amount of power from that wave as is produced by the antenna receiving it. At any point, a beam of radio waves has an irradiance or power flux density which is the amount of radio power passing through a unit area of","PeriodicalId":392097,"journal":{"name":"International Journal of Advanced Trends in Engineering, Science and Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114880191","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}

{"title":"Performance and Improvement of ARS Ultrawideband Antenna","authors":"R. Nayak, R. Singh, M. Ram","doi":"10.22413/IJATEST/2018/V3/I4/1","DOIUrl":"https://doi.org/10.22413/IJATEST/2018/V3/I4/1","url":null,"abstract":"In this paper, a compact style and experimental study of microstrip-Line fed annular-ring formed (ARS) antenna is conferred. The antenna consists of two ARS that area unit diagonally connected to every different with a curving ring and a changed L-shaped ground plane. The antenna provides an extremist wide information measure with return loss, which apparently covers entire UWB band. Additionally, the antenna incorporates a considerably compact size. The measured and simulated results ensure the quality of the antenna for ultra-wideband applications. I.INTRODUCTION UltraWideband technology includes a big variety of applications in short-range high rate communications and microwave radar near-field imaging. As an example, microwave optics is employed for tissue imaging, microwave radar near-field imaging in fossil oil pipeline imaging to check the corrosion, and observance the submarine conditions of various objects. The important demand for pipeline review victimization microwave radar imaging is that antenna must be operated in fossil oil of insulator constant 2.5, and also the size of the antenna ought to be as tiny as doable. Because the image resolution is directly proportional to the information measure of the heartbeat, all the imaging applications need wide information measure. Microstrip antenna with completely different shapes like octagonal-shaped, arc-shaped, M-shaped, ringshaped slot, polygon formed, M-shaped, triangular geometries has been projected for UltraWideband application. In, a C-shaped radiator with Associate in nursing inverted L-shaped coupled strip extending from the bottom plane is employed for information measure improvement, whereas coupling impact between the structures is employed to enhance the electric resistance matching. A plate like crossed monopole antenna and an oblong patch with Ushaped open-slot structure are rumored for the triangular geometries UltraWideband application. Doubled ramp-shape feeding techniques square measure used for increased information measure, and shorting pins square measure accustomed miniaturize the scale of the patches. A unique compact microstrip-fed UltraWideband step-slot antenna with a revolved patch for increased electric resistance information measure is incontestable in. All the antennas mentioned on top of square measure larger in size and offer a comparatively lower electric resistance information measure than the projected antenna style. Additional reduction of the antenna size would face a challenge because the sizes of those antennas are set by the longest electrical length of the surface currents at very cheap frequency. During this chapter, a miniaturized style is projected and investigated for broadband applications employing a microstrip-line fed annular-ring monopole radiator for line imaging. Within the projected style, an angular-ring formed diverging patch and defected ground plane is employed with an embedded curved stub within the feed-line to get increased info","PeriodicalId":392097,"journal":{"name":"International Journal of Advanced Trends in Engineering, Science and Technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657062","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}