نوع مقاله : مقالة‌ تحقیقی‌ (پژوهشی‌)

نویسندگان

عضو هیأت‌علمی گروه پژوهشی سیستم‌های فضایی پژوهشگاه هوافضا، وزارت علوم، تحقیقات و فناوری، تهرن، ایران

چکیده

هدف از این پژوهش، بررسی اثرات قطر صفحه زمین آنتن هلیکال مود محوری بر مشخصات تشعشعی آنتن است. بررسی­ها نشان می­دهند که انتخاب مناسب نسبت قطر صفحه زمین نسبت به قطر هلیکس می­تواند مصالحه­ای منطقی میان عملکرد مطلوب آنتن و جرم آن برقرار نماید. تحلیل­های عددی نشان می­دهند که این نسبت برابر با 5/1 است. نتایج این پژوهش نشان می­دهند که با افزایش این نسبت، جرم آنتن افزایش چشمگیری خواهد داشت؛ حال­آنکه در عملکرد آن بهبود قابل ملاحظه­ای ایجاد نمی­شود. براساس نتایج حاصل از شبیه­سازی، نسبت معرفی شده در این پژوهش، مستقل از تعداد دورهای هلیکس است. پس از استخراج نتایج اندازه­گیری شده از نمونه­های ساخته شده در اتاق آنتن، مشاهده شد که انطباق قابل توجهی میان این نتایج با نتایج حاصل از شبیه­ سازی وجود دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Low-Profile Helical Antenna for Space Application

نویسندگان [English]

  • Fatemeh Sadeghikia
  • Ali Karami Horestani

Member of the Faculty of Space Systems Research Group, Aerospace Research Institute, Ministry of Science, Research and Technology, Tehran, Iran

چکیده [English]

The aim of this study is to examine the effects of diameter of ground conductor in an axial mode helical antenna on some of the characteristics of the antenna. It is shown that a proper ratio of diameter of ground plane to diameter of helix can be chosen to make a trade-off between the performance of helical antenna and its mass budget. It is shown through computational analysis that this optimum ratio is about 1.5. The results show that an increase in this ratio increases the mass budget, but it does not improve the antenna performance significantly. The simulation results also indicatethat this ratio is independent of the number of helix turns. After measurement, it was found that the simulation results of the antenna well agreed with its measured results acquired at the anechoic chamber.

کلیدواژه‌ها [English]

  • Axial mode helical antenna
  • Gain
  • Ground plane dimension
  • Space application
[1]  Kraus, J.D. Antennas, New York: McGraw-Hill, 2001: 265-338.
[2]  Varamini, G., Keshtkar, A. and Naser-Moghadasi, M., “Miniaturization of microstrip loop antenna for wireless applications based on metamaterial metasurface,” International Journal of Electronics and Communications, Vol. 83, 2018, pp. 32-39.
[3]  N. Yeganeh, A., Najmolhoda, S.H., Sedighy, S.H., Mohammd-Ali-Nezhad, S., “Design of a compact planar wide band antenna family,” International Journal of Electronics and Communications, Vol. 83, 2018, pp. 280-287.
[4] Imbriale, W.A., Gao, S. and Boccia, L., Space Antenna Handbook, 1st edition, India: John Wiley & Sons, Ltd, 2012.
[5] King, H. and Wong, J., “Characteristics of 1 to 8 wavelength uniform helical antennas,” IEEE Transactions on Antennas and Propagation, Vol. 28, No. 2, 1980, pp. 291-296.
[6] Wong, J. and King, H., “Empirical helix antenna design, International Symposium on Antennas and Propagation Society,” Vol. 20, No. 1, 1982, pp. 366-369.
[7] Baharin, R.H., Yamada, Y., Kamardin, K., Dinh, N. Q. and Michishita, N., Input Resistances of Small Normal-Mode Helical Antennas in Dielectric Materials, IEEE Asia Pacific Microwave Conference (APMC), Kuala Lumpar, Malaysia,2017.
[8] Liu,  L., Li,  Y., Zhang,  Z. and Feng, Z., “Circularly Polarized Patch-Helix Hybrid Antenna With Small Ground,” IEEE Antennas and Wireless Propagation Letters, Vol. 13, 2014, pp. 361-364.
[9] Rimbault, N., Sharaiha, A. and Collardey, S., “Low profile high gain helix antenna over a conical ground plane for UHF RFID applications,” International Symposium on Antenna Technology and Applied Electromagnetics, 2012, pp. 1-3.
[10]  Sadeghkia,  F., Mahmoodi,  M., Hashemi-Meneh,  H. and Ghayoomeh, J., “Helical antenna over different ground planes,” 8th European Conference on Antennas and Propagation, 2014, pp. 2185-2188.
[11]  Jung,  Y. B., Eom, S.Y., “Dual-Band Horn Array Design Using a Helical Exciter for Mobile Satellite Communication Terminals,” IEEE Trans.on Antennasand Propagation, Vol. 60, No. 3, 2012, pp. 1336-1342.
[12]  Djordjević, R., Zajić, A.G., Ilić, M.M. and Stüber, G.L., “Optimization of helical antennas,” IEEE Antennas and Propagation Magazine, Vol. 48, No. 6, 2006, pp. 107-115.
[13]  Djordjevic, R., Zajic, A.G. and Ilic, M. M., “Enhancing the gain of helical antennas by shaping the ground conductor,” IEEE Antennas and Wireless Propagation Letters, Vol. 5,  No. 1, 2006, pp. 138-140.
[14]  Morsy,  M.M. and  Harackiewicz, F., “On optimization of the ground conductor of helical antennas,” Antennas and propagation Society International Symposium , Memphis, TN, USA, 2014.
[15]  Sadeghikia, F. and Horestani, A.K., “A parametric study on the dimensions of the ground plane of an axial mode helical antenna,” IEEE Asia Pacific Microwave Conference (APMC), 2017.