Title :
Single-Layer Dual-Band Reflectarray With Single Linear Polarization
Author :
Shi-Wei Qu ; Qing-Yong Chen ; Ming-Yao Xia ; Xiu Yin Zhang
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China
Abstract :
This paper presents two kinds of novel elements to design single-layer dual-band reflectarray, with identical polarization in two closely separated bands. Several degrees of freedom of the proposed elements are tuned to match the desired phase compensations at two center frequencies simultaneously. It is noted that the dual-band characteristics are realized by a single integrated element rather than conventional dual-band elements with independent tunable components corresponding to two center frequencies. A 10 × 10-element offset-fed reflectarray operating at 9 and 13.5 GHz, with a ratio of the center frequencies 1.5, is designed and fabricated to validate the performance of the element, and the measured results show reasonable agreements with simulations. Due to the incompleteness of reflection phase distribution at the two center frequencies of the presented element, a complementary element with four resonances is introduced. Then, a 20 × 20-element reflectarray composed of both kinds of elements is also designed, and the measured results demonstrate a good availability of the proposed elements.
Keywords :
linear antenna arrays; polarisation; reflectarray antennas; center frequencies; dual band characteristics; dual band elements; frequency 9 GHz to 13.5 GHz; identical polarization; phase compensations; reflection phase distribution; single layer dual band reflectarray; single linear polarization; Antenna radiation patterns; Delays; Dual band; Frequency measurement; Mutual coupling; Reflection; Resonant frequency; Dual-band reflectarray; identical polarization; mutual coupling; single layer;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2287517