Dual-Layer Beamscanning Reflectarray Antenna Operating at Ku-Band

• 出版年: Journal of High-Frequency Communication Technologies
• 主要な著者: Vidhyashree Suresh, Aishika Bhattacharjee, Kirubaveni Savarimuthu
• フォーマット: 論文
• 言語: 英語
• 出版事項: Blue Martin Press 2023-02-01
• 主題: beam scanning; reflectarray; reconfigurable; varactor or varicap diode; ku-band
• オンライン･アクセス: https://bluemartinpress.com/ojs/index.php/jhct/article/view/3

This paper presents a beam scanning electronically reconfigurable reflectarray configuration for Ku-band applications using a single varactor diode.  A 15×15 center-fed reconfigurable reflectarray antenna is designed consisting of 225 octagonal shaped unit cells. The proposed tunable element has a unit cell size of 9.8 mm, developed on a 1.575 mm thick Taconic TLY-5 substrate. A single varactor diode is integrated with the tunable element to produce a reflection phase variation of 340° at 14.1 GHz. In this work, both the varactor and biasing circuit are placed beneath the substrate to avoid unexpected reflections, which leads to achieving a pencil beam of 8.1° beamwidth. The simulation results of the reconfigurable reflectarray antenna (RRA) shows good beam-scanning radiation performance of scanning range ±30° and a peak gain of 27.6 dBi. This structure provides a convenient solution for Ku-band distinctive applications like uplink operation in the direct broadcast satellite system, digital video broadcasting, earth exploration satellites, space research satellites, and defense systems.