High gain ultrawide band vivaldi antenna design for mini/micro satellite synthetic aperture radar applications
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Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Institute of Electrical and Electronics Engineers Inc.
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this paper, Vivaldi antenna array design with high gain and directivity, which works in ultra-wide band, is presented especially for Synthetic aperture radar applications in small surveillance satellites. The proposed antenna structure has been modified to improve the parameters that make up the radiation characteristic of an antenna, such as directivity, gain, return loss (S11), voltage standing wave ratio (VSWR), and antenna efficiency. Firstly, the design parameters of a single antenna element are optimized using Genetic Algorithms (GA). The optimized Vivaldi antenna structure in 4449 mm dimensions offers high antenna gain and return loss(S11)below-10 dB in X-band (8-12 GHz) and Ku-band (12-18 GHz) frequency range. As a substrate, Rogers Duroid 5880 with a 2.2 dielectric constant and 0.508 mm thickness, which can be easily found on the market and preferred at high frequencies, has been used. The antenna structure, which is optimized for use in high resolution synthetic aperture radar applications, is designed as a planar antenna array. The planar antenna array (44)is formed with 16 elements. The distance between the elements and the amplitude of current is optimized by GA in order to enhance antenna gain by minimizing side lobe levels (SLL) and the grating lobes in operating band width. In this way, the side lobe level below-20 dB, the average 18 dB gain during the operating frequency and the highest 19.4 dB antenna gain at 10 GHz have been obtained. The measurement and simulation results are in agreement and the proposed antenna has been proven to be suitable for high resolution SAR applications. © 2019 IEEE.
Açıklama
Airbus; Aselsan; et al.; Roketsan; STM Engineering Technology Consultancy; Turkish Aerospace
9th International Conference on Recent Advances in Space Technologies, RAST 2019 -- 11 June 2019 through 14 June 2019 -- Istanbul -- 149874
9th International Conference on Recent Advances in Space Technologies, RAST 2019 -- 11 June 2019 through 14 June 2019 -- Istanbul -- 149874
Anahtar Kelimeler
genetic algorithm, satellite, synthetic aperture radar, ultra wide band, Vivaldi antenna
Kaynak
Proceedings of 9th International Conference on Recent Advances in Space Technologies, RAST 2019
WoS Q Değeri
Scopus Q Değeri
N/A
