paper 150304134404

Abstract

A broadband slotted bow-tie antenna is presented. The antenna is fed by copla- nar waveguide (CPW) and fabricated on an InP substrate for same chip integration with the promising resonant tunnelling diode (RTD) terahertz (THz) oscillator which has the capability of room temperature operation and with relative high power. The antenna exhibits a very wide bandwidth (return loss S11 < −10 dB) around the design frequency (300 GHz). However, due to the large dielectric constant of the InP substrate, most of the radiation is directed into the substrate. To re-direct the energy into air, a bow tie antenna employing a reflector ground plane underneath a thin substrate of low dielectric constant is presented. Initial simulation results of this technique are reported and experimental validation at lower frequency (17 GHz) shows the feasibility of the concept.

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Khalid Hamed Alharbi

Monageng Kgwadi

Ata Khalid

Afesomeh Ofiare

Jue Wang

Edward Wasige