Generating contoured beams for malaysia region by using a caustic locus graph [antenna applications corner]

N. H. Abd Rahman, Mohammad Tariqul Islam, Norbahiah Misran, Y. Yamada, N. Michishita

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

It is very important to achieve precisely contoured beams in satellite-communication applications. For the case of Malaysia, separate contoured beams for the peninsular (West Malaysia) and Borneo (East Malaysia) regions must be achieved. For this purpose, the calculation of accurate feed positions in widely distributed feed areas is considered one of the critical aspects in designing a contoured-beam antenna system. Although some equations for precise feed positions have been proposed in previous papers, a graphical expression for the feed positions seems more convenient. In this paper, firstly, several trials to achieve a universal feed-position graph that is applicable for any antenna's f/D (focal-length-to-diameter ratio) and any beam direction were conducted. For this purpose, receiving-mode ray tracings were performed for various f/D values and beam directions in MATLAB. The accuracy of the universal feed-position graph was verified through radiation-pattern calculations by using the FEKO electromagnetic solver. Based on the proposed graph, the positions of the array elements for array feed configurations for the peninsular and Borneo regions were next determined. For the array feed, through observation of the calculated contoured beams by electromagnetic simulations, the optimum excitation coefficients of each radiating element were determined. Finally, excellent contoured beams were ensured through electromagnetic simulations.

Original languageEnglish
Article number7011080
Pages (from-to)328-336
Number of pages9
JournalIEEE Antennas and Propagation Magazine
Volume56
Issue number6
DOIs
Publication statusPublished - 1 Dec 2014

Fingerprint

Malaysia
Antenna feeders
loci
alkalies
antennas
Antennas
Communication satellites
Ray tracing
MATLAB
electromagnetism
satellite communication
ray tracing
simulation
radiation
coefficients
configurations

Keywords

  • antenna feeds
  • caustic
  • microstrip antenna arrays
  • ray tracing
  • Reflector antennas
  • satellite antennas

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Generating contoured beams for malaysia region by using a caustic locus graph [antenna applications corner]. / Abd Rahman, N. H.; Islam, Mohammad Tariqul; Misran, Norbahiah; Yamada, Y.; Michishita, N.

In: IEEE Antennas and Propagation Magazine, Vol. 56, No. 6, 7011080, 01.12.2014, p. 328-336.

Research output: Contribution to journalArticle

@article{7e06efa821fe4976ad5edbc6b2931d14,
title = "Generating contoured beams for malaysia region by using a caustic locus graph [antenna applications corner]",
abstract = "It is very important to achieve precisely contoured beams in satellite-communication applications. For the case of Malaysia, separate contoured beams for the peninsular (West Malaysia) and Borneo (East Malaysia) regions must be achieved. For this purpose, the calculation of accurate feed positions in widely distributed feed areas is considered one of the critical aspects in designing a contoured-beam antenna system. Although some equations for precise feed positions have been proposed in previous papers, a graphical expression for the feed positions seems more convenient. In this paper, firstly, several trials to achieve a universal feed-position graph that is applicable for any antenna's f/D (focal-length-to-diameter ratio) and any beam direction were conducted. For this purpose, receiving-mode ray tracings were performed for various f/D values and beam directions in MATLAB. The accuracy of the universal feed-position graph was verified through radiation-pattern calculations by using the FEKO electromagnetic solver. Based on the proposed graph, the positions of the array elements for array feed configurations for the peninsular and Borneo regions were next determined. For the array feed, through observation of the calculated contoured beams by electromagnetic simulations, the optimum excitation coefficients of each radiating element were determined. Finally, excellent contoured beams were ensured through electromagnetic simulations.",
keywords = "antenna feeds, caustic, microstrip antenna arrays, ray tracing, Reflector antennas, satellite antennas",
author = "{Abd Rahman}, {N. H.} and Islam, {Mohammad Tariqul} and Norbahiah Misran and Y. Yamada and N. Michishita",
year = "2014",
month = "12",
day = "1",
doi = "10.1109/MAP.2014.7011080",
language = "English",
volume = "56",
pages = "328--336",
journal = "IEEE Antennas and Propagation Society Newsletter",
issn = "1045-9243",
publisher = "IEEE Computer Society",
number = "6",

}

TY - JOUR

T1 - Generating contoured beams for malaysia region by using a caustic locus graph [antenna applications corner]

AU - Abd Rahman, N. H.

AU - Islam, Mohammad Tariqul

AU - Misran, Norbahiah

AU - Yamada, Y.

AU - Michishita, N.

PY - 2014/12/1

Y1 - 2014/12/1

N2 - It is very important to achieve precisely contoured beams in satellite-communication applications. For the case of Malaysia, separate contoured beams for the peninsular (West Malaysia) and Borneo (East Malaysia) regions must be achieved. For this purpose, the calculation of accurate feed positions in widely distributed feed areas is considered one of the critical aspects in designing a contoured-beam antenna system. Although some equations for precise feed positions have been proposed in previous papers, a graphical expression for the feed positions seems more convenient. In this paper, firstly, several trials to achieve a universal feed-position graph that is applicable for any antenna's f/D (focal-length-to-diameter ratio) and any beam direction were conducted. For this purpose, receiving-mode ray tracings were performed for various f/D values and beam directions in MATLAB. The accuracy of the universal feed-position graph was verified through radiation-pattern calculations by using the FEKO electromagnetic solver. Based on the proposed graph, the positions of the array elements for array feed configurations for the peninsular and Borneo regions were next determined. For the array feed, through observation of the calculated contoured beams by electromagnetic simulations, the optimum excitation coefficients of each radiating element were determined. Finally, excellent contoured beams were ensured through electromagnetic simulations.

AB - It is very important to achieve precisely contoured beams in satellite-communication applications. For the case of Malaysia, separate contoured beams for the peninsular (West Malaysia) and Borneo (East Malaysia) regions must be achieved. For this purpose, the calculation of accurate feed positions in widely distributed feed areas is considered one of the critical aspects in designing a contoured-beam antenna system. Although some equations for precise feed positions have been proposed in previous papers, a graphical expression for the feed positions seems more convenient. In this paper, firstly, several trials to achieve a universal feed-position graph that is applicable for any antenna's f/D (focal-length-to-diameter ratio) and any beam direction were conducted. For this purpose, receiving-mode ray tracings were performed for various f/D values and beam directions in MATLAB. The accuracy of the universal feed-position graph was verified through radiation-pattern calculations by using the FEKO electromagnetic solver. Based on the proposed graph, the positions of the array elements for array feed configurations for the peninsular and Borneo regions were next determined. For the array feed, through observation of the calculated contoured beams by electromagnetic simulations, the optimum excitation coefficients of each radiating element were determined. Finally, excellent contoured beams were ensured through electromagnetic simulations.

KW - antenna feeds

KW - caustic

KW - microstrip antenna arrays

KW - ray tracing

KW - Reflector antennas

KW - satellite antennas

UR - http://www.scopus.com/inward/record.url?scp=84921807450&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921807450&partnerID=8YFLogxK

U2 - 10.1109/MAP.2014.7011080

DO - 10.1109/MAP.2014.7011080

M3 - Article

AN - SCOPUS:84921807450

VL - 56

SP - 328

EP - 336

JO - IEEE Antennas and Propagation Society Newsletter

JF - IEEE Antennas and Propagation Society Newsletter

SN - 1045-9243

IS - 6

M1 - 7011080

ER -