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Dual-Band Circularly Polarized Equilateral Triangular-Patch Array Antenna for Mobile Satellite Communications

Main Authors: Josaphat Tetuko Sri Sumantyo, Koichi Ito, Masaharu Takahashi
Format: Journal Book
Terbitan: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION , 2005
Subjects:
komunikasi mobile satelit
Online Access: http://opac.unila.ac.id/ucs/index.php?p=show_detail&id=41122
Daftar Isi:
  • The Japan Aerospace Exploration Agency will launch the Engineering Test Satellite VIII (ETS-VIII) in 2006 to supportthe next generation of mobile satellite communications covering the area of Japan (beam coverage = 38 to 58 ). In thispaper, a satellite-tracking left-handed circularly polarized triangular- patch array antenna is developed for ground applications.The targeted minimum gain of the antenna is set to 5 dBic at the central elevation angle ( = 48 ), in the Tokyo area, for applications using data transfer of around a hundred kbps. Theantenna is composed of three equilateral triangular patches for both reception and transmission units operating at 2.50 and 2.65GHz frequency bands, respectively. The antenna was simulated by method of moments (MoM) analysis, and measurement of the fabricated antenna was performed to confirm the simulation results. The measurement results show that the frequency characteristics and the 5-dBic gain coverage in the conical-cut plane ofthe fabricated antenna satisfy the specifications for ETS-VIII. A prototype of the proposed antenna system is employed in outdoorexperiments using a pseudosatellite and shows good performance from = 38 to 58 . Index Terms—Circular polarization, dual band, equilateral triangular-patch, mobile satellite communications, outdoor experiments, pseudosatellite[1] J. H. Jang, M. Tanaka, and N. Hamamoto, “Portable and deployable antenna for ETS-VIII,” in Proc. Interim Int. Symp. Antennas and Propagation, 2002, pp. 49–52.[2] K. Ito, K. Ohmaru, and Y. Konishi, “Planar antennas for satellite reception,” IEEE Trans. Broadcast., vol. 34, no. 4, pp. 457–464, Dec. 1988.[3] K. Ito, J.-P. Daniel, and J.-M. Lenormand, “A printed antenna composed of strip dipoles and slots generating circularly polarized conical patterns,”in Proc. IEEE AP-S Int. Symp., 1989, pp. 632–635.[4] K. 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