Iranian Communication and Information Technology
فصلنامه فناور اطلاعات و اتباطات ایران
فصلنامه فناوری اطلاعات
Engineering & Technology
http://jor.iranaict.ir
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محاسبه سریع انتگرالهای تشعشعی با روش FFT جهت کاربرد در تحلیل آنتنهای بازتابنده شکلیافته
A Fast Method to Compute Radiation Fields of Shaped Reflector Antennas by FFT
فناوری اطلاعات و ارتباطات
ICT
پژوهشي
Research
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<!--stripped--><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">در این مقاله، روشی
سریع برای محاسبه پترن تشعشعی میدان دور آنتنهای بازتابنده<a name="_ftnref1" href="#_ftn1"><span class="MsoFootnoteReference"><span style="font-family: "B Lotus""><span dir="ltr"><span class="MsoFootnoteReference"><span style="font-size: 11pt">[1]</span></span></span></span></span></a>
با تحریک دلخواه در محل تغذیه ارائه میگردد. آنتن بازتابنده با روش نور هندسی</span><span lang="AR-SA" style="font-size: 6pt font-family: "B Lotus"" dir="rtl"> </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">GO</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-size: 3pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span> </span><a name="_ftnref2" href="#_ftn2"><span class="MsoFootnoteReference"><span lang="FA" style="font-size: 10pt font-family: "B Nazanin"" dir="rtl"><span dir="ltr"><span class="MsoFootnoteReference"><span style="font-size: 8pt">[2]</span></span></span></span></span></a><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> تحلیل </span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">شده،
سپس </span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">میدانهای تشعشعی با روش میدان دریچه </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">AFM</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-size: 5pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span> </span><a name="_ftnref3" href="#_ftn3"><span class="MsoFootnoteReference"><span lang="FA" style="font-size: 11pt font-family: "B Zar"" dir="rtl"><span dir="ltr"><span class="MsoFootnoteReference"><span style="font-size: 9pt">[3]</span></span></span></span></span></a><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> </span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">بدست آمده و
انتگرالهای تشعشعی با تبدیل فوریه</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">
دوبعدی</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">FFT</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-size: 11pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span> </span><span dir="ltr"></span><span dir="ltr"></span><span style="font-size: 11pt font-family: "Times New Roman","serif""><span dir="ltr"></span><span dir="ltr"></span><span> </span></span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">مبتنی بر مشبندی بهینه دریچه محاسبه میشوند. براساس
روش ارائه شده، نرمافزاری مبتنی بر </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">MATLAB</span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span><span> </span>طراحی و پیادهسازی شده است که قابلیت شبیهسازی
</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">آنتنهای بازتابنده </span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl">شکلیافته
با ابعاد بزرگ نسبت به طول موج و تغذیه جابجا شده از کانون را دارد. به عنوان
نمونه، دو آنتن مورد استفاده در صنایع نظامی از جمله آنتن رادار مراقبت هوایی و
رادار</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> تاکتیکی</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">TPS</span><span style="font-size: 10pt font-family: "Times New Roman","serif"">-43</span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span> تحلیل
شده و با نتایج شبیهسازی حاصل از نرمافزار </span><span style="font-size: 9pt font-family: "Times New Roman","serif"">FEKO</span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"><span dir="rtl"></span><span dir="rtl"></span> و اندازهگیری
مقایسه شده است. این روش در عین سادگی، سرعت و دقت مناسبی در تحلیل آنتنهای
بازتابنده شکلیافته دارد. لذا نرمافزار حاصل</span><span lang="FA" style="font-size: 11pt font-family: "B Lotus"" dir="rtl"> در
طراحی آنتنهای بازتابنده با تغذیه جابجا شده، میتواند یک ابزار مناسب جهت تعیین
اولیه کارآیی آنتن و مشخصات تشعشعی موردنیاز باشد و در صورت حصول پارامترهای طراحی
موردنظر،</span><span lang="FA" style="font-size: 11pt line-height: 97% font-family: "B Lotus""> شبیهسازی دقیقتر با نرمافزارهایی نظیر </span><span style="font-size: 9pt line-height: 97%" dir="ltr">FEKO</span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="font-size: 11pt line-height: 97% font-family: "B Lotus""><span dir="rtl"></span><span dir="rtl"></span> یا </span><span style="font-size: 9pt line-height: 97%" dir="ltr">NEC</span><span dir="rtl"></span><span dir="rtl"></span><span lang="FA" style="font-size: 11pt line-height: 97% font-family: "B Lotus""><span dir="rtl"></span><span dir="rtl"></span>
انجام شود و بدین صورت زمان موردنیاز در روند طراحی کمتر شود</span><span dir="ltr"></span><span dir="ltr"></span><span style="font-size: 11pt line-height: 97%" dir="ltr"><span dir="ltr"></span><span dir="ltr"></span>.</span><span lang="FA" style="font-size: 11pt line-height: 97% font-family: "B Lotus""></span>
<p style="text-align: right direction: rtl unicode-bidi: embed" dir="rtl" class="MsoNormal"><b><span lang="FA" style="font-size: 6pt font-family: Lotus"> </span></b></p>
<div><br clear="all" >
<hr width="33%" size="1" align="left" >
<div id="ftn1">
<p style="text-indent: 0cm" class="MsoFootnoteText"><a name="_ftn1" href="#_ftnref1"><span class="MsoFootnoteReference"><span style="font-size: 9pt line-height: 105% font-weight: normal vertical-align: baseline"><span><span class="MsoFootnoteReference"><span style="font-size: 9pt vertical-align: baseline">[1]</span></span></span></span></span></a><span style="font-size: 9pt line-height: 105% font-weight: normal">.</span><span style="font-size: 9pt line-height: 105% font-weight: normal">Reflector
antennas</span><span style="font-size: 9pt line-height: 105% font-weight: normal"></span></p>
</div>
<div id="ftn2">
<p style="text-indent: 0cm" class="MsoFootnoteText"><a name="_ftn2" href="#_ftnref2"><span class="MsoFootnoteReference"><span style="font-size: 9pt line-height: 105% font-weight: normal vertical-align: baseline"><span><span class="MsoFootnoteReference"><span style="font-size: 9pt vertical-align: baseline">[2]</span></span></span></span></span></a><span class="MsoFootnoteReference"><span style="font-size: 9pt line-height: 105% font-weight: normal vertical-align: baseline">.Geometrical
Optics</span></span><span class="MsoFootnoteReference"><span lang="AR-SA" style="font-size: 11pt line-height: 105% font-family: "B Nazanin" font-weight: normal vertical-align: baseline" dir="rtl"></span></span></p>
</div>
<div id="ftn3">
<p style="text-indent: 0cm" class="MsoFootnoteText"><a name="_ftn3" href="#_ftnref3"><span class="MsoFootnoteReference"><span style="font-size: 9pt line-height: 105% font-weight: normal vertical-align: baseline"><span><span class="MsoFootnoteReference"><span style="font-size: 9pt vertical-align: baseline">[3]</span></span></span></span></span></a><span class="MsoFootnoteReference"><span style="font-size: 9pt line-height: 105% font-weight: normal vertical-align: baseline">.Aperture
Field Method</span></span><span class="MsoFootnoteReference"><span lang="AR-SA" style="font-size: 11pt line-height: 105% font-family: "B Nazanin" font-weight: normal vertical-align: baseline" dir="rtl"></span></span></p>
</div>
</div>
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<p class="Abstract"><font face="times new roman,times,serif"><b><span style="font-size: 12pt line-height: 150% font-style: normal">Abstract</span></b></font></p>
<font face="times new roman,times,serif"><span style="font-size: 12pt font-family: "Times New Roman","serif"">A rapid calculation method of the far-field
radiation patterns of a shaped reflector antenna illuminated by a feed in an
arbitrary location is reported. In this method, the equations of geometrical
optics (GO) are used to calculate the reflected electric field using the
radiation patterns of the feed and the parameters defining the reflector
surface. These fields comprise the aperture field distribution which is
integrated over the aperture plane by Fast Fourier Transform (FFT) algorithm
based on low-size meshing of the aperture to yield the far-field radiation
patterns and to calculate other antenna parameters. Shaped Reflector Antenna
Design and Analysis Software (SRADAS) based on this numerical method can
analyze and simulate all shaped reflector antennas with large dimensions in
regard to the wavelength. SRADAS has been implemented and used in Information
and Communication Technology Institute (ICTI) to analyze and simulate different
practical parabolic and shaped reflector antennas. In order to confirm the
integrity of the proposed calculation method, two practical antennas are
analyzed using this software. The results are in good agreement with the
results obtained by commercial software (Method of Moment) and measurement.
Large shaped reflector antennas can be simulated by SRADAS fast and accurately.</span></font>
آنتنهای بازتابنده، انتگرالهای تشعشعی، FFT.
Reflector antenna, Radiation integrals, Two-dimensional Fast Fourier Transform (FFT), Optimum meshing size
31
39
http://jor.iranaict.ir/browse.php?a_code=A-10-354-4&slc_lang=fa&sid=1
zakerHosein
Firouzeh
ذاکر حسین
فیروزه
1003194753284600523
1003194753284600523
Yes
School of Electrical and Computer Engineering, Isfahan University
دانشکده مهندسی برق و کامپیوتر، دانشگاه صنعتی اصفهان
abolghasem
Zeidaabadi-ezhad
ابوالقاسم
زیدآبادی نژاد
1003194753284600524
1003194753284600524
No
School of Electrical and Computer Engineering, Isfahan University
دانشکده مهندسی برق و کامپیوتر، دانشگاه صنعتی اصفهان
Hamid
Mirmohammad-Sadeghi
حمید
میرمحمد صادقی
1003194753284600525
1003194753284600525
No
Isfahan University of Technology
پژوهشکده فناوری اطلاعات و ارتباطات، دانشگاه صنعتی اصفهان