Design of Broadband Transmitarray Unit Cells With Comparative Study of Different Numbers of Layers

作者：Nematollahi Hoda^*; Laurin Jean Jacques; Page J E; Encinar Jose A

来源：IEEE Transactions on Antennas and Propagation, 2015, 63(4): 1473-1481.

DOI：10.1109/TAP.2015.2402285

• Multilayers
• spatial phase shifters
• transmitarray (TA) antenna

A generalized methodology to design low-profile transmitarray (TA) antennas made of several stacked layers with nonresonant printed phasing elements is presented. A study of the unit cell bandwidth, phase-shift range and tolerances has been conducted considering different numbers of layers. A structure with three metalized layers with capacitive and inductive elements enabling a phase range of nearly 360 degrees and low insertion loss is introduced. A study of the four-layer structure shows improvement in the performance of the unit cells in terms of bandwidth from 2% to more than 20% and a complete phase coverage. Implementations on a flexible substrate of TAs with progressive phase shift operating at 19 GHz are used for validation.

• 出版日期2015-4