Small Loop Antenna System Design for Radio Direction Finding

861d2ade-8d8e-4540-bea0-219ee520bc2220211216091056846wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON COMMUNICATIONS2224-28641109-274210.37394/23204http://wseas.org/wseas/cms.action?id=40212320212320212010.37394/23204.2021.20https://wseas.org/wseas/cms.action?id=23291Small Loop Antenna System Design for Radio Direction FindingTain-SouTsayDepartment of Aeronautical Engineering, National Formosa University, No.64, Wen-Hua Road, Huwei, Yunlin, TAIWANIn this literature, a low-cost small loop antenna is developed for radio direction finding. It consists of two coupled rectangular counter-wiring loop antennas. A signal-processing circuit is developed also for demodulated outputs. A single rectangular loop antenna is discussed first for illustrating the receiving characteristics and then the proposed two coupled rectangular counter-wiring loop antennas are designed for radio direction finding. Measurements give a large linear detecting range. It is ready for Omni-directional application using another two coupled loop antennas and can be used as a tracking control device.121620211216202117217622https://wseas.com/journals/communications/2021/a445104-018(2021).pdf10.37394/23204.2021.20.22https://wseas.com/journals/communications/2021/a445104-018(2021).pdf10.1109/tap.1964.1138213H. Whiteside and R. W. P. King, "The loop antenna as a probe", IEEE Transactions on Antennas and Propagation, Vol.12, no. 3, pp. 291-297, 1964. 10.1109/8.277222M. A. Jensen, and Y. Rahmat-Samii, ” Electromagnetic characteristics of super-quadric wire loop antennas,” IEEE Transactions on Antennas and Propagation, 1994, Vol.42, No.2, pp.264- 269. 10.1109/tap.2005.859917R. L. Li, G. DeJean, J. Laskar, and M. M. Tentzeris, “Investigation of Circularly Polarized Loop Antennas With a Parasitic Element for Bandwidth Enhancement, ” IEEE Transactions on Antennas and Propagation, Vol. 53, No. 12, 2005, pp.3930-3939. 10.1109/map.2005.1487778A. Boswell, A. J. Tyler, and A. White, ” Performance of a small loop antenna in the 3-10 MHz band,” IEEE Antennas and Propagation Magazine, Vol.47, No.22, 2005, pp.51-56. 10.1002/mop.24008Y. W. Chi and K. L. Wong,” Very-Small-Size Printed Loop Antenna for GSM/DCS/ PCS/UMTS Operation in the mobile phone, ”Microwave and Optical Technology Letters, Vol. 51, No. 1, 2009, pp.184-192. 10.3390/s20113178S. Youn, T. H. Lim, E. Kang , D. H. Lee, K. B. Kim and H. Choo, ”Design of a Miniaturized Rectangular Multiturn Loop Antenna for Shielding Effectiveness Measurement,” Sensors, 2020, 20, 3178; doi:10.3390/s20113178. 10.1109/tap.1975.1141058T. Tsukiji, ”Analysis of two coupled coplanar loops, “IEEE Transactions on Antennas and Propagation, Vol.23, No.2, 1975, pp.250-253. 10.1109/tap.1966.1138711K. Iizuka, R. King, and C. Harrison, ”Self- and mutual admittances of two identical circular loop antennas in a conducting medium and in air, ”IEEE Transactions on Antennas and Propagation, 1966, Vol.14, No.4, pp.440-450.