Related Experiment Video
Updated: Jun 5, 2026

Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
Coupling of terahertz waves to a two-wire waveguide
Hamid Pahlevaninezhad1, Thomas E Darcie
1Department of Electrical and Computer Engineering, University of Victoria, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada. hpahleva@uvic.ca
Abstract:
We calculate theoretically the coupling of a terahertz wave from a dipole into a two-wire waveguide. The field transmission and reflection are obtained using a Single Mode Matching (SMM) technique at the input port of the two-wire waveguide. The results show more than 70 percent coupling efficiency for the waveguide using 500 μm radii wires with 2mm center-to-center separation and the exciting field cross section of 1mm × 1mm. The results also show good agreement with the full-wave numerical simulations using the Finite Element Method (FEM).
Related Concept Videos
Standing Waves in a Cavity
Magnetic Field Due to Two Straight Wires
Generating Electromagnetic Radiations
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...

