Circularly Polarized Transmitarray With Sequential Rotation in Ka-Band

Author

Di Palma, Luca ; Clemente, Antonio ; Dussopt, Laurent ; Sauleau, Ronan ; Potier, Patrick ; Pouliguen, Philippe

Author_Institution

LETI, CEA, Grenoble, France

Volume

63

Issue

11

fYear

2015

Firstpage

5118

Lastpage

5124

Abstract

We present here the design and demonstration of a circularly polarized (CP) transmitarray antenna operating in Ka-band and illuminated by a linearly polarized (LP) source. The proposed design is based on a CP unit-cell with simulated insertion loss of 0.2 dB at 30 GHz. In order to improve the axial ratio (AR) bandwidth, the sequential rotation technique is applied to the full array configuration. A model based on a hybrid in-house simulation tool is also proposed to predict accurately the array performance. The realized prototype, formed by 400 unit-cells, has 1 bit of phase resolution. The measured broadside gain is 22.8 dBi at 30 GHz with a 3-dB bandwidth of 20% in right-handed CP (RHCP). The obtained 3-dB AR bandwidth of 24.4% is comparable with higher resolution designs.

Keywords

electromagnetic wave polarisation; microwave antenna arrays; millimetre wave antenna arrays; CP unit cell; Ka band; axial ratio bandwidth; circularly polarized transmitarray antenna; frequency 30 GHz; full array configuration; hybrid in-house simulation tool; linearly polarized source; loss 0.2 dB; right-handed CP; sequential rotation; word length 1 bit; Antenna radiation patterns; Arrays; Bandwidth; Gain; Gain measurement; Insertion loss; Transmitting antennas; Circular polarization (CP); circular polarization; discrete lens; sequential rotation; transmitarray;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2015.2474149

Filename

7226805