اخبار و اعلانات
آمار
| تعداد نشریات | 38 |
| تعداد شماره‌ها | 1,240 |
| تعداد مقالات | 8,994 |
| تعداد مشاهده مقاله | 7,844,913 |
| تعداد دریافت فایل اصل مقاله | 4,706,562 |
سنتز پرتو مسطح در آنتن بازتابنده چند تغذیه ای | ||
| رادار | ||
| مقاله 2، دوره 9، شماره 1 - شماره پیاپی 25، شهریور 1400، صفحه 17-23 اصل مقاله (710.8 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| محمدحسین امینی1؛ ایمان آریانیان* 2 | ||
| 1دانشجوی دکتری، مرکز تحقیقات مخابرات ایران، تهران، ایران | ||
| 2استادیار، پژوهشگاه ارتباطات و فناوری اطلاعات، پژوهشکده فناوری ارتباطات، تهران، ایران | ||
| تاریخ دریافت: 15 فروردین 1400، تاریخ بازنگری: 04 خرداد 1400، تاریخ پذیرش: 14 آذر 1400 | ||
| چکیده | ||
| تحقیقات بسیاری بر روی آنتن‌های بازتابنده با هدف شکل دهی پرتو با استفاده از شکل‌دهی سطح انجام گرفته است. با این وجود مطالعات اندکی بر روی رهیافت چند تغذیه‌ای انجام گرفته است. هدف این مقاله تحقق پرتو مسطح در آنتن‌های بازتابنده با استفاده از رهیافت چند تغذیه‌ای است. در این راستا بر پایه الگوریتم ژنتیک و بکارگیری روش نور فیزیکی (PO)، ضرایب تحریک عناصر تغذیه آنتن بازتابنده در جهت تحقق پرتو موردنظر سنتز می‌گردند. در این مقاله همچنین، روشی جهت کاهش زمان محاسبه‌ی انتگرالهای تشعشعی PO پیشنهاد شده است. در روش حاضر انتگرالهای تشعشعیPO طی نگاشتی به فضای دو بعدی تصویر می‌گردد و در نتیجه زمان محاسبات به میزان 30 درصد کاهش می‌یابد. روند ارائه شده در جهت تحقق پرتو مسطح در بازه‌ی زاویه‌ای 20- تا 20+ مورد استفاده قرار گرفت و خصوصیات پرتو بدست آمده با آنچه از طریق روش شکل‌دهی به سطح بازتابنده انجام گرفته، مقایسه شده است. نتایج نشان می‌دهد که رهیافت چند تغذیه‌ای می‌تواند پرتو مورد نظر را با دقت بهتری حاصل کند. | ||
| کلیدواژه‌ها | ||
| آنتن بازتابندة چندتغذیه ای؛ پرتو مسطح؛ نور فیزیکی | ||
| عنوان مقاله [English] | ||
| The Flat-Topped Pattern Synthesis of the Multi-Feed Reflector Antenna | ||
| نویسندگان [English] | ||
| Mohammad Hossein Amini1؛ Iman Aryanian2 | ||
| 1PhD Student, Iran Telecommunication Research Center, Tehran, Iran | ||
| 2Assistant Professor, Research Institute of Communication and Information Technology, Research Institute of Communication Technology, Tehran, Iran | ||
| چکیده [English] | ||
| Numerous researches have been performed on the reflector antenna for realizing beam-shaping using level-shaping. However, little study has been done for realizing the shaped beam through the multi-feed approach. The main goal of this paper is to provide a synthesis procedure for realizing the flat-topped pattern in reflector antennas using the multi-feed approach. In this way, based on the genetic algorithm (GA) and utilizing the physical optic (PO) method, the excitation coefficient of the feeding array is synthesized to achieve the desired pattern. Furthermore, in this paper, an efficient method for reducing the computational time of PO integrals is introduced. In this way, the 3D PO integrals are mapped to 2D integrals; which results in about 30% computational time reduction. The proposed procedure is employed to realize a flat-topped pattern in the angular scope of -20o to +20o and the radiation characteristics are compared with those presented through the shaped reflector method in the literature. Results show that the multi-feed approach obtains the desired beam more accurately. | ||
| کلیدواژه‌ها [English] | ||
| Multi-Feed Reflector Antenna, Flat-Topped Pattern, Physical Optic | ||
| مراجع | ||
|
[1] S. R. Samareh Hashemi and S. A. Seyedin, “Fast Imaging in Ground-Based Circular Strip-Map Synthetic Aperture Radar,” Journal of Radar, vol. 3, no. 1, pp. 57-72, 2015. (In Persian) [2] N. Montaseri and Y. Qane Qarebagh, “Design and Synthesis of Cosecant-Squared Pattern in Microstrip Array Antenna using Genetic Algorithm Optimization,” Journal of Radar, vol. 5, no. 3, pp. 27-36, 2017. (In Persian) [3] A. Pirhadi, M. H. Rahmani, and A. Mallahzadeh, “Shaped beam array synthesis using particle swarm optimisation method with mutual coupling compensation and wideband feeding network,” IET, Microwaves, Antennas and Propagation, vol. 8, pp. 549-555, 2014. [4] T. Carberry, “Analysis theory for the shaped-beam doubly curved reflector antenna,” IEEE Transactions on Antennas and Propagation, vol. 17, no. 2, pp. 131-138, March 1969. [5] S. Junhao, “On the Improvement of Shaped-Beam Doubly Curved Reflector Antenna,” 2006 7th International Symposium on Antennas, Propagation and EM Theory, Guilin, pp. 1-3. 2006. [6] S. Junhao, L. Hongmei and W. Chao, “IFF antenna sharing the reflector with the C-band radar,” Proceedings of the 9th International Symposium on Antennas, Propagation and EM Theory, Guangzhou, pp. 293-295. 2010. [7] V. Schejbal, J. Pidanic, and O. Fiser, “Broadband Approximation of Radiation Patterns for Doubly Curved Reflector Antennas [Antenna Designer's Notebook],” IEEE Antennas and Propagation Magazine, vol. 53, no. 6, pp. [8] A. Dastranj, H. Abiri, and A. Mallahzadeh, “Design of a Broadband Cosecant Squared Pattern Reflector Antenna Using IWO Algorithm,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 7, pp. 3895-3900, July 2013. [9] A. Brunner and E. Kress, “Monopulse Antennas with Doubly Curved Reflectors,” 1974 4th European Microwave Conference, Montreux, Switzerland, pp. 357-361. 1974. [10] A. I. Zaghloul, Y. Hwang, R. M. Sorbello, and F. T. Assal, “Advances in multibeam communications satellite antennas,” Proc. IEEE, vol. 78, pp. 1214–1232, July 1990. [11] F. Vipiana, G. Vecchi, M. Sabbadini, “A multiresolution approach to contoured-beam antennas,” IEEE Trans. Antennas Propag., vol. 55, no. 3, pp. 684–697, 2007. [12] H. T. Chou, Y. T. Hsaio, P. H. Pathak, P. Nepa and [13] T. S. Bird, “Contoured-beam synthesis for array-fed reflector antennas by field correlation,” IEE Proc. Microw. Opt. Antennas, vol. 129, no. 6, pp. 293–298, 1982. [14] J. W. Marshall, “A nulling algorithm for multi-aperture multiplebeam antennas,” in Proc. IEEE Military Communications Conf. (MILCOM’94), vol. 1, 1994, pp. 27–31. [15] S. D. Gray, “Nulling performance comparison between a single- and multiple-aperture multiple-beam antenna,” IEEE Trans. Antennas Propagat., vol. 43, pp. 1319–1324, Nov. 1995. [16] A. Foudazi and A. R. Mallahzadeh, “Pattern synthesis for multi-feed reflector antennas using invasive weed optimisation,” IET Microw. An .and Propag, vol. 6, no. 14, pp. 1583–1589, 2012.
[18] X. Cai and W. Geyi, “An Optimization Method for the Synthesis of Flat-Top Radiation Patterns in the Near- and Far-Field Regions,” IEEE Trans. Antennas Propagat, vol. 67, no. 2, pp. 980-987, Feb. 2019. [19] H. Patidar, G. K. Mahanti, and R. Muralidharan, “Synthesis of flat-top beam pattern of linear antenna arrays with restricted side lobe level, VSWR and independent nulls using Flower Pollination algorithm,” International Journal of Electronics, vol. 106, pp. 1964-1977, 2019. [20] A. R. Mallahzadeh and P. Taghikhani, “Shaped elevation pattern synthesis for reflector antenna,” Electromagnetics, vol. 33, no. 1, pp. 40–50, 2013. [21] W. A. Imbriale, P. G. Ingerson, and W. C.Wong, “Large lateral feed displacements in a parabolic reflector,” IEEE Trans. Antennas Propagat., vol. AP-22, pp. 742–745, Nov. 1974. [22] J. Ruze, “Lateral-feed displacement in a paraboloid,” IEEE Trans. Antennas Propagat., vol. 13, pp. 660–665, Sep. 1965. [23] I. Aryanian and M. H. Amini, “Synthesis of contoured beam multifeed reflector antenna for optimum coverage,” Microw Opt Technol Lett. pp. 1– 7, Sep. 2020. [24] A. Hasani, M. Hajiahmadi, and I. Aryanian, “An Efficient Method for Calculation of Physical Optics Integral for Large Reflector Antennas,” Electrical Engineering (ICEE), Iranian Conference on, Mashhad, pp. 558-561, 2018. [25] N. Jin, and Y. Rahmat-Samii, “Advances in particle swarm optimization for antenna designs real-number, binary, single-objective and multiobjective implementations,” IEEE Trans. Antennas Propag., vol. 55, no. 3, pp. 556–567, 2007. [26] Y. Rahmat-Samii and E. Michielssen, “Electromagnetic Optimization by Genetic Algorithm,” New York: Wiley, 1999. [27] J. M. Johnson and Y. Rahmat-Samii, “Genetic algorithms in engineering electromagnetics,” IEEE Antennas Propag. Mag., vol. 39, pp. 7–21, Aug. 1997. [28] D. S. Weile and E. Michielssen, “Genetic algorithm optimization applied to electromagnetics: A review,” IEEE Trans. Antennas Propag., vol. 45, pp. 343–353, Mar. 1997. [29] M. R. Amini, M. Mahdavi, and M. J. Omidi, “Maximizing Dynamic Access Energy Efficiency in Multiuser CRNs With Primary User Return,"IEEE Systems Journal, vol. 13, no. 2, pp. 1702-1713, June 2019. [30] A. J. Martinez-Ros, J. L. Gómez-Tornero and G. Goussetis, “Multifunctional Angular Bandpass Filter SIW Leaky-Wave Antenna,” in IEEE Antennas and Wireless Propagation Letters, vol. 16, pp. 936-939, 2017. | ||
|
آمار تعداد مشاهده مقاله: 274 تعداد دریافت فایل اصل مقاله: 277 |
||