Pisano, Giampaolo  ORCID: https://orcid.org/0000-0003-4302-5681, Ng, Ming Wah, Haynes, Victor and Maffei, Bruno
2012.
A broadband metal-mesh half-wave plate for millimetre wave linear polarisation rotation.
Progress In Electromagnetics Research M
25
, pp. 101-114.
10.2528/PIERM12051410
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Abstract
We present a polarisation rotator based on a dielectrically embedded metal Mesh Half Wave Plate (MHWP) working in the W-band frequency range (75-110 GHz). The device was realised using metallic grids with sub-wavelength anisotropic geometries able to mimic the behaviour of natural birefringent materials. The device was designed using a combination of transmission line codes and finite-element analysis able to achieve phase accuracy down to a fraction of degree. Very accurate intensity and phase measurements were carried out using coherent radiation from a Vector Network Analyser (VNA). The presented device performs better and it is much thinner than previous devices having reduced the number of grids by a factor two and minimised their inductive losses. The new mesh HWP has excellent performances in terms of differential phase-shift flatness and cross-polarisation, respectively 180.4±2.9° and -28 dB across a 25% bandwidth.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Publisher: | EMW Publishing |
| ISSN: | 1937-8726 |
| Last Modified: | 25 Oct 2022 09:50 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/60240 |
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