استفاده از آرایه آنتنی برای افزودن پرتودیسی به جهتیاب تداخل‌سنج فازی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده برق، دانشگاه صنعتی شریف، تهران، ایران

2 دانشیار، دانشکده برق، دانشگاه صنعتی شریف، تهران، ایران

3 دانشجوی کارشناسی ارشد، دانشگاه صنعتی شریف، تهران، ایران

چکیده

در جهت‌یابی تداخل‌سنج فازی از آنتن‌های پهن بیم استفاده می‌شود تا محدودة زاویه‌ای مناسبی را تحت پوشش قرار دهد. این مسئله باعث کاهش بهرة آنتن‌ها شده و بُرد پوشش‌دهی جهت‌یاب را کاهش می‌دهد. در این مقاله سعی می‌شود تا با اضافه کردن آنتن‌های بیشتر به مجموعه آنتن‌ها، پرتودیسی را به جهت‌یاب اضافه کرد. با این کار، مهم‌ترین مزیتی که به‌دست می‌آید افزایش بهره و افزایش بُرد جهت‌یاب است، همچنین مزیت دیگر آن، امکان کاهش تعداد گیرنده‌های جهت‌یاب است که برای رفع ابهام اضافه شده بودند. برای اضافه کردن پرتودیسی به جهت‌یاب، چیدمان آنتن‌ها بررسی می‌شود و دو نوع چیدمانِ جفت آنتن‌های هم مرکز و چیدمانِ تکرار الگوی پایه معرفی می‌شوند. همچنین با چند شبیه‌سازی، میزان کارایی جهت‌یاب پیشنهادی و دقت لازم برای چیدمان درست، بررسی می‌شوند.

کلیدواژه‌ها


عنوان مقاله [English]

The Application of Array Antenna for Beamforming Feature Addition to the Phase Interferometer Direction Finder

نویسندگان [English]

  • Ghasem Sobhani 1
  • fereidoon behnia 2
  • saber kaviani 3
1 PhD Student, Faculty of Electrical Engineering, Sharif University of Technology, Tehran, Iran
2 Associate Professor, Faculty of Electrical Engineering, Sharif University of Technology, Tehran, Iran
3 Master student, Sharif University of Technology, Tehran, Iran
چکیده [English]

In this paper a modified Gaussian pulse stimulus is employed to improve the accuracy of tumor
detection inside breast phantom for 2D reconstructed image results in cylindrical setup of the
microwave imaging system. This pulse shaping puts more energy at higher frequencies in
contrast with conventional Gaussian pulse shaping in the impulse radar. Hence a wider
bandwidth is available to achieve higher accuracy for precise spatial localization. In the present
article a simulated cylindrical setup of the microwave imaging system with a modified
stimulated pulse is generated. The main purpose of this paper is employing a new stimulating
pulse to detect a tumor from a biological phantom for 2D visualization of time-domain results.
In order to achieve the goal, the advantages of generating a novel confocal image-reconstructing
algorithm based on back-projection method is employed. The advantage conferred by “high
resolution imaging” is that more energy is used at reflected signal than with conventional
confocal imaging, and subsequently a relatively lower spatial resolution in identifying the
reflected signal is achieved. Simulated results are presented to validate the effectiveness of the
proposed method for precisely calculating the time-dependent location of targets.

کلیدواژه‌ها [English]

  • Radar
  • High-Resolution UWB Microwave Imaging System (UWB-MIS)
  • Confocal Microwave Imaging Algorithm (CMIA)
  • Gaussian Derivatives
[1]     R. G. Wiley, “ELINT: The Interception and Analysis of Radar Signals,” Artech House Radar Library, 2006. 
[2]     C. A. Balanis, “Antenna Theory Analysis and Design,” Harper and Row, Publishers, New York, 1982.
[3]     H. Xiaojing, Y. Jay Guo, and J. D. Bunton, “A Hybrid Adaptive Antenna Array,” IEEE Trans. Wireless Commun., vol. 9, no. 5, pp. 1770-1779, 2010.
[4]     H. Xiaojing  and Y. Jay Guo, “Frequency-Domain AOA Estimation and Beamforming with Wideband Hybrid Arrays,” IEEE Trans. Wireless Commun., vol. 10, no. 8, pp. 2043-2053, 2011.
[5]     Y.  Jay, H.  Xiaojing,  and  V.  Dyadyuk, “A Hybrid Adaptive Antenna Array for Long-Range mm-wave Communications [Antenna Applications Corner],” IEEE Antennas Propag. Mag., vol. 54, no. 2, pp. 271-282, 2012.
[6]     A. Zhang Jian, “Massive Hybrid Antenna Array for Millimeter-Wave Cellular Communications,” IEEE Trans. Wireless Commun , vol. 22, no. 1, pp. 79-87, 2015.
[7]     C. Sheng-Fu, W. R. Wu, and Y. T. Liu, “High-Resolution AoA Estimation for Hybrid Antenna Arrays,” IEEE Trans. Antennas Propag., vol. 63, no. 7, pp. 2955-2968, 2015.
[8]     K. Wu, et al, “Robust Unambiguous Estimation of Angle-of-Arrival in Hybrid Array with Localized Analog Subarrays,” IEEE Trans. Wireless Commun., vol. 17, no 5, pp. 2987-3002, 2018.
[9]     K. Wu, et al, “Fast and Accurate Estimation of Angle-of-Arrival for Satellite-Borne Wideband Communication System,” IEEE J. Sel. Areas Commun., vol. 36, no. 2, pp. 314-326, 2018.
[10]  K. Wu, et al, “Expeditious Estimation of Angle-of-Arrival for Hybrid Butler Matrix Arrays,” IEEE Trans. Wireless Commun., vol. 18, no. 4, pp. 2170-2185, 2019.
[11]  N. Zhitong, et al, “Estimation of Multiple Angle-of-Arrivals with Localized Hybrid Subarrays for Millimeter Wave Systems,” IEEE Trans. Commun., vol. 68, no. 3, pp. 1897-1910, 2019.
[12]  S. Jaspreet and S. Ramakrishna, “On the Feasibility of Codebook-Based Beamforming in Millimeter Wave Systems with Multiple Antenna Arrays,” IEEE Trans. Wireless Commun., vol. 14, no. 5, pp. 2670-2683, 2015.
[13]  L. Hang, et al, “Low-Complexity Multiuser Receiver for Massive Hybrid Array MmWave Communications,” IEEE Trans. Commun., vol. 67, no. 5, pp. 3512-3524, 2019.
[14]  [14] Li, Hang, Thomas Q. Wang, and Xiaojing Huang, “Joint Adaptive AoA and Polarization Estimation Using Hybrid Dual-Polarized Antenna Arrays,” IEEE Access, vol. 7, pp. 76353-76366, 2019.
[15]  Noh, Song, Jiho Song, and Youngchul Sung, “Fast Beam Search and Refinement for Millimeter-Wave Massive MIMO Based on Two-Level Phased Arrays,” IEEE Trans. Wireless Commun., vol. 19, no. 8, pp. 6737-6751, 2020.
[16]  M. Ferdosizade Naeiny, Y. Eghbali, and F. Moradi, “DoA Estimation in the Presence of the Unknown Mutual Coupling Using a UCA with Directive Antennas,” Jurnal of Radars, vol. 6, no. 1, pp. 27-36, 2018. (In Persian)
[17]  L. Wei and S. Weiss, “Wideband beamforming: concepts and techniques,” John Wiley & Sons, 2010.
[18]  R. Naga   S. Pavan, “A Lumped Component Programmable Delay Element for Ultra-Wideband Beamforming,” Custom Integr. Circuits Conference (CICC), 2013.
[19]  R. Naga and S. Pavan, “Design of Lumped-Component Programmable Delay Elements for Ultra-Wideband Beamforming,” IEEE J. Solid-State Circuits, vol. 49, no. 8, pp. 1800-1814, 2014.