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A novel broadband reflectarray antenna with lattice stubs on square element for K u ‐band application
Author(s) -
Qotolo Sajjad Faraji,
Hassani Hamid Reza,
NaserMoghadasi Mohammad
Publication year - 2015
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29416
Subject(s) - broadband , hfss , optics , microstrip antenna , planar , microwave , materials science , patch antenna , ku band , optoelectronics , antenna (radio) , electrical engineering , physics , engineering , telecommunications , computer science , computer graphics (images)
In this article, a single layer unit cell reflectarray antenna comprising a fixed square patch to which is attached a lattice of symmetric open ended stubs is proposed. The phase response of the proposed unit cell element is governed by the length of the lattice, providing more than 600° of reflection phase variation. The unit cell element of 0.54λ 0 × 0.54λ 0 , has a thin dielectric substrate thickness of 0.036λ 0 and is placed above an air layer making the overall unit cell thickness of 0.126λ 0 . A 15 × 15 elements Ku‐band reflectarray antenna is designed with an area of 18 × 18 cm 2 . The reflectarray is center fed by a linearly polarized pyramidal horn antenna. The planar reflectarray antenna is fabricated and has wide −1 dB gain bandwidth, about 20% covering 12.1–14.8 GHz. The measured antenna gain at 13.5 GHz is 25 dB which is equivalent to 39% efficiency. The proposed unit cell and the reflectarray antenna are simulated through CST and HFSS software packages. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2699–2702, 2015