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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-07-06
A Broadband Metal-Mesh Half-Wave Plate for Millimetre Wave Linear Polarisation Rotation
By
Giampaolo Pisano,

    Dr. Giampaolo Pisano

    Sch Phys & Astron

    The University of Manchester

    England

    Homepage

Ming Wah Ng,

    Dr. Ming Wah Ng

    Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy

    The University of Manchester

    UK

    Homepage

Victor Haynes,

    Dr. Victor Haynes

    Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy

    The University of Manchester

    UK

    Homepage

Bruno Maffei

    Dr. Bruno Maffei

    School of Physics and Astronomy

    The University of Manchester

    UK

    Homepage

Progress In Electromagnetics Research M, Vol. 25, 101-114, 2012
doi:10.2528/PIERM12051410 | Google Scholar

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.
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Citation
Giampaolo Pisano, Ming Wah Ng, Victor Haynes, and Bruno Maffei, "A Broadband Metal-Mesh Half-Wave Plate for Millimetre Wave Linear Polarisation Rotation," Progress In Electromagnetics Research M, Vol. 25, 101-114, 2012.
doi:10.2528/PIERM12051410
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