Cross polarization in swept beam THz imaging systems using off-axis parabolic mirrors

Pouyan Rezapoor*, Aleksi Tamminen, Irina Nefedova, Juha Ala-Laurinaho, Nuria Llombart, Helena Rodilla, Jan Stake, Zachary Taylor

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussaConference article in proceedingsScientificvertaisarvioitu

36 Lataukset (Pure)

Abstrakti

The optical behavior of a terahertz imaging system employing a train of four identical off-axis parabolic mirrors with oblique incidence angle illumination is investigated in this work. The aperture filling and aberrations of a single off-axis parabolic mirror when illuminated by a Gaussian terahertz beam at its focus point is measured and simulated. The amplitude of E-field in transverse electric (TE) and transverse magnetic (TM) polarizations at target plane reveals a significant cross polarization, even when there is zero cross polarization at the source beam, amplitude of which is ∼ 33% of TE polarization. The investigation of the E-field on the detector plane reveals that this ratio is ∼ 1.5% at the detector plane, and the cross polarized E-field at the target plane is rotated back to co polarization. Although its amplitude is negligible, the TM distribution at detector plane is bimodal and tilted about the optical axis.

AlkuperäiskieliEnglanti
Otsikko2022 16th European Conference on Antennas and Propagation, EuCAP 2022
KustantajaIEEE
Sivumäärä4
ISBN (elektroninen)978-88-31299-04-6
ISBN (painettu)978-1-6654-1604-7
DOI - pysyväislinkit
TilaJulkaistu - 2022
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaEuropean Conference on Antennas and Propagation - Madrid, Espanja
Kesto: 27 maalisk. 20221 huhtik. 2022
Konferenssinumero: 16
https://www.eucap2022.org/

Julkaisusarja

NimiProceedings of the European Conference on Antennas and Propagation
ISSN (painettu)2164-3342

Conference

ConferenceEuropean Conference on Antennas and Propagation
LyhennettäEuCAP
Maa/AlueEspanja
KaupunkiMadrid
Ajanjakso27/03/202201/04/2022
www-osoite

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