Broadband Bow-Tie Slot Antenna with Tuning Stub for Resonant Tunnelling Diode Oscillators with Novel Configuration for Substrate Effects Suppression

Alharbi, K. H., Khalid, A. , Ofiare, A., Wang, J. and Wasige, E. (2017) Broadband Bow-Tie Slot Antenna with Tuning Stub for Resonant Tunnelling Diode Oscillators with Novel Configuration for Substrate Effects Suppression. In: European Microwave Conference, London, 3-7 Oct 2016, pp. 421-424. ISBN 9782874870439 (doi:10.1109/EuMC.2016.7824369)

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Abstract

Radiation from antennas integrated with InP-based resonant tunnelling diode (RTD) oscillators is usually degraded because of the effects of the large dielectric constant substrate. The common solution has been to use hemispherical lenses to extract the signal from the backside of the substrate. In this paper we present a broadband bow-tie slot antenna with tuning stub which is diced and mounted on a ground plane to alleviate the substrate effects. Here, the large dielectric constant substrate around the antenna conductor is removed. In addition, the ground plane underneath the diced substrate acts as a reflector and, ultimately, the antenna radiates to air-side direction. The antenna was designed and fabricated using photolithography techniques to offer wide bandwidth (return loss S11 <-10dB) between 200-350 GHz on semi-insulating InP substrate with dielectric constant of ϵr = 12.56. Simulated and measured bandwidth almost extends the frequency range 230-325 GHz. Simulations shows air-side radiation pattern, an antenna gain of around 11 dB at 290 GHz and 98% radiation efficiency.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Wasige, Professor Edward and Wang, Dr Jue and Khalid, Dr Ata-ul-Habib and Ofiare, Dr Afesomeh
Authors: Alharbi, K. H., Khalid, A., Ofiare, A., Wang, J., and Wasige, E.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
ISBN:9782874870439
Published Online:19 January 2017
Copyright Holders:Copyright © 2016 EuMA
First Published:First published in 2016 46th European Microwave Conference (EuMC): 421-424
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
585691Compact MMIC Teraherz Sources in the 0.1-1 THz RangeEdward WasigeEngineering & Physical Sciences Research Council (EPSRC)EP/J019747ENG - ENGINEERING ELECTRONICS & NANO ENG