Farohaji Kurniawan, Josaphat Tetuko Sri Sumantyo, Gunawan Setyo Prabowo, Yanuar Prabowo, Yohandri, Achmad Munir
This paper presents the development of circularly polarized microstrip antenna using triangular truncation with axial ratio enhancement for X-band communication of Synthetic Aperture Radar (SAR) system. It is well-known that the axial ratio is ome of most essential characteristics in term of antenna with circular polarization. Many methods had been reported in attempting to generate circular polarization, one of them is by utilizing a truncation technique. Thus, in this work a novel truncation shape using a triangular truncation is introduced. The required antenna dimension is less than 40\mathbf{mm}\times 40\mathbf{mm}. A single patch antenna is developed by two layers of NPC-H220A substrate with each thickness of 1.6mm and dielectric constant of 2.17. The feeding line is positioned at the middle part between the first layer and the second layer. Here, the proposed antenna attains a decent circular polarization. The axial ratio obtained is 0.49GHz with the low frequency stands at 7.9GHz and the high frequency stands at 8.44GHz. Meanwhile, the minimum requirements of antenna design are 0.4GHz bandwidth with the resonant frequency at 8.2GHz. © 2019 IEEE.
Center for Aeronautics Technology, National Institute of Aeronautics and Space, Bogor, Indonesia; Josaphat Microwave Remote Sensing Laboratory, Center for Environmental Remote Sensing, Graduate School Advanced Integration Science, Chiba University, Chiba, Japan; Universitas Negeri Padang, Physics Department, Padang, Indonesia; Radio Telecommunication and Microwave Laboratory, School of Electrical Engineering and Informatics, Institut Teknologi Bandung, Bandung, Indonesia
