A broadband photolithographic polariser for millimetre wave applications

G. Pisano, M. W. Ng, V. Haynes, B. Maffei

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    Circular polarisers are used to convert linear- into circular-polarisation, and vice versa.This is achieved by introducing a phase-shift of 90° between two orthogonal polarisations passing through the device.These devices can be designed using slabs of birefringent material with the appropriate thicknesses (Quarter-Wave Plates).An interesting alternative solution consists of designing planar metallic grids with sub-wavelength geometries that exhibits different behaviour along two orthogonal axes.In this work we present a broadband dielectrically embedded quasi-optical polariser built using photolithographic techniques.The device was experimentally tested using a Vector Network Analyser working in W-band (75-110 GHz).The presented results are in excellent agreement with finite-element analysis simulations: across a 30% bandwidth the transmission along the two axes and the very flat differential phase-shift are respectively: T C = 0:92, T L= 0:95 and Δ℘LC = 89:3 ± 1:5°.
    Original languageEnglish
    Title of host publicationProgress in Electromagnetics Research Symposium|Prog. Electromagn. Res. Symp.
    Pages1748-1751
    Number of pages3
    Publication statusPublished - 2012
    EventProgress in Electromagnetics Research Symposium, PIERS 2012 Kuala Lumpur - Kuala Lumpur
    Duration: 1 Jul 2012 → …

    Conference

    ConferenceProgress in Electromagnetics Research Symposium, PIERS 2012 Kuala Lumpur
    CityKuala Lumpur
    Period1/07/12 → …

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