Dual-Circularly Polarized High-Gain Transmitarray Antennas at Ka-Band

Journal article (2020)

Authors

Kien T. Pham Vietnam National University
D.J. Blanco Montero Tera-Hertz Sensing - EEMCS
Ronan Sauleau University of Rennes
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

This communication describes the performance of the dual-circularly polarized transmitarray antennas at the Ka-band with independent radiation characteristics. The proposed antenna architecture consists of a dual-linearly polarized (dual-LP) TA panel based on the interleaving technique combined with an add-on broadband polarizer to generate independent right-handed circular polarization (CP) (RHCP) and left-handed CP (LHCP) beams. This offers both dual-LP and dual-CP operation depending on the topology of the polarizer. The LP unit-cell is designed to achieve a 3 bit phase resolution, and the dual-LP TA panel is made of two interleaved single-LP subarrays with 52 × 52 and 53 × 53 elements operating in 45° and 135° single LP, respectively. The polarizer transforms the dual-LP into dual-CP while keeping the radiation independence of each polarization across the Ka-band. The experimental results obtained with three different prototypes pointing up to 50° validate the proposed concepts.

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