Pulsed Photoconductive Connected Slot Array Operating at the Sub-mm Wavelength Band

Conference Paper (2019)
Author(s)

A. Garufo (TU Delft - Tera-Hertz Sensing)

P.M. Sberna (TU Delft - EKL Equipment)

G. Carluccio (TU Delft - Tera-Hertz Sensing)

Joshua R. Freeman (University of Leeds)

David R. Bacon (University of Leeds)

L. Li (University of Leeds)

J. Bueno (SRON–Netherlands Institute for Space Research)

J. Baselmans (TU Delft - Tera-Hertz Sensing, SRON–Netherlands Institute for Space Research)

Edmund H. Linfield (University of Leeds)

A.G. Davies (University of Leeds)

I.E. Lager (TU Delft - Electrical Engineering Education)

N. Llombart (TU Delft - Tera-Hertz Sensing)

A. Neto (TU Delft - Tera-Hertz Sensing)

Research Group
Tera-Hertz Sensing
DOI related publication
https://doi.org/10.23919/EuMC.2019.8910907
More Info
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Publication Year
2019
Language
English
Research Group
Tera-Hertz Sensing
Pages (from-to)
820-823
ISBN (electronic)
9782874870552

Abstract

A novel pulsed photoconductive THz source is presented that is able to radiate mW-level average powers, over a large bandwidth by exploiting both the optical and electrical properties of photoconductive sources and the ultrawideband properties of connected antenna arrays. An optical system composed of a micro-lenses array splits the laser beam into N × N spots that host the active excitation of the antenna arrays. An 'ad hoc' network has been adopted to bias the array active spots in order to implement a connected antenna array configuration. The array feeds a silicon lens to increase the directivity of the radiated THz beam. A slot array prototype has been designed, fabricated, and measured. The proposed solutions achieve excellent power radiation levels by making use of an accurate electromagnetic design. This solution can offer enhancements to any active system relying on pulsed photoconductive antennas.

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