Hyperbolic-cosine waveguide tapers and oversize rectangular waveguide for reduced broadband insertion loss in W-band electron paramagnetic resonance spectroscopy

Broadband Rectangular Waveguide to GCPW Transition

A broadband transition design between rectangular waveguide and GCPW is proposed and studied. The E-field of GCPW is designed to be gradually changed to that of waveguide via the simple tapered probes and metallic vias. The planar circuit of the transition is fabricated by low cost standard PCB process. The tolerance analysis for this transition is also given. A back-to-back transition prototyp...

Electron Paramagnetic Resonance Spectroscopy

A design of Rectangular Waveguide TM11 to TE10 Mode Converter for S-band Applications

A design of a compact, easy to fabricate and applicable structure rectangular waveguide TM11 to TE10 mode converter is presented in this paper. The design procedure of the proposed structure can be divided into two parts in sequence. The beginning one is dedicated to the transformation from TM11 to TEM mode using a central conductor, while the second part is the transformation from TEM to TE10 ...

ELECTRON PARAMAGNETIC RESONANCE (EPR) SPECTROSCOPY AND GEOCHEMISTRY IN TIN EXPLORATION AT RENISON, TASMANIA AUSTRALIA

Rock powder of dolomite samples from the Renison mine area of Tasmania, Australia were analyzed by electron paramagnentic resonance spectroscopy (EPR), Atomic Absorption and Mass Spectrometer to identify alteration related to mineralisation. The least-altered dolomite samples, which are not effected by circulation of diagenetic and hydrothermal fluids are characterised by low Mn and Fe and ...

Low transmission loss, simple, and broadband waveguide-to-microstrip line transducer in V-, E- and W-band

A low transmission loss, simple mechanical structure, and broadband waveguide-to-microstrip line transducer has been developed with a polytetrafluoroethylene printed circuit board. This can fully cover the V-band, E-band, and W-band, and the transmission losses are typically 0.68 dB, 0.86 dB, and 0.78 dB, respectively, at the center frequency of each band. The transducer in the W-band was alrea...