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Design of Broadband, Single Layer Dual-Band Large Reflectarray Using Multi Open Loop Elements

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4 Author(s)
Mohammad Reza Chaharmir ; Communications Research Centre Canada, Ottawa, Ontario ; Jafar Shaker ; Nicolas Gagnon ; David Lee

A novel method is introduced to design a single layer, dual-band large printed reflectarray with open loop elements of variable size for both bands. The reflectarray is designed for two frequency bands: 11.4-12.8 GHz for receive and 13.7-14.5 GHz for transmit. Different classes of open cross loop elements were used in the design of the receive band elements. Noting the larger relative bandwidth at the lower band as compared to the upper band, the dimensions of these cross loops are adjusted, using an optimization technique to achieve required phase distribution at the center frequency and minimize frequency dispersion at extreme frequencies of the lower band. Double square open loop elements with variable loop length were used for the transmit band elements. The reflectarray consists of 3 × 3 panels of 40 cm × 40 cm, that are arranged side by side to construct the large 120 cm × 120 cm reflectarray. The flat configuration and modular nature of this reflectarray gives it an advantage from the installation point of view as compared to conventional dish antennas.

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:58 ,  Issue: 9 )