Dual-band Ka/X reflectarray with broadband loop elements

• Published in: IET microwaves, antennas & propagation Vol. 4; no. 2; pp. 225 - 231
• Main Authors: CHAHARMIR, M. R, SHAKER, J, LEGAY, H
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 01.02.2010; The Institution of Engineering & Technology
• Subjects: Antennas; Applied sciences; Broadband; Circuit properties; Design engineering; Diffraction, scattering, reflection; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Gain; Ground plane; Microwave antennas; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Optimization; Radiocommunications; Radiowave propagation; Ring structures; Telecommunications; Telecommunications and information theory; Performance evaluation; Frequency selective surfaces; Prototype; X band; Microwave; Centimetric wave; Optimal design; Ring structure; Reflector antenna; Wide band; Ka band; Insertion loss; Multiple frequency; Gain
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/iet-map.2008.0369

The objective of this paper, is to carry out analysis and design for X/Ka dual-band, frequency selective surface (FSS)-backed reflectarrays. In this design, a novel ring structure has been developed as the cell element for both the X- and Ka-bands to achieve dual-band performance. A single loop was used for the construction of the FSS-backed reflectarray in the Ka-band and a reflectarray with a solid ground plane was designed for the other band. Prototypes of these reflectarrays were fabricated and tested. The measurements demonstrated that for an optimum design, the gain of the FSS-backed reflectarray is almost the same, as its counterpart backed by a solid ground plane. Characterisation of the out-of-band performance of these antennas, demonstrated a close to 0.6-dB insertion loss.