scholarly journals Free-space confocal magneto-optical spectroscopies at milliKelvin temperatures

2021 ◽  
Author(s):  
Benjamin J. Lawrie ◽  
Matthew Feldman ◽  
Claire E. Marvinney ◽  
Yun-Yi Pai
Keyword(s):  
Free Space ◽  
Millikelvin Temperatures

FORM BIREFRINGENT STRUCTURES MATCHING TO FREE SPACE IN THE TERAHERTZ FREQUENCY RANGE

2015 ◽  
Vol 74 (19) ◽  
pp. 1767-1776 ◽  
Author(s):  
V. I. Bezborodov ◽  
O.S. Kosiak ◽  
Ye. M. Kuleshov ◽  
V. V. Yachin
Keyword(s):  
Free Space ◽  
Terahertz Frequency ◽  
Frequency Range ◽  
Terahertz Frequency Range

Microwave Non-Destructive Testing of Coatings and Paints Using Free Space Microwave Measurement

2005 ◽  
Vol 2 (2) ◽  
pp. 17
Author(s):  
Norhayati Hamzah ◽  
Deepak Kumar Ghodgaonkar ◽  
Kamal Faizin Che Kasim ◽  
Zaiki Awang
Keyword(s):  
Free Space ◽  
Protective Coatings ◽  
Microwave Measurement ◽  
Multiple Reflections ◽  
Destructive Testing ◽  
Lens Antennas ◽  
Coatings And Paints ◽  
Microwave Nondestructive Testing ◽  
Mode Transitions ◽  
Diffraction Effects

Microwave nondestructive testing (MNDT) techniques are applied to evaluate quality of anti-corrosive protective coatings and paints on metal surfaces. A tree-space microwave measurement (FSMM) system is used for MNDT of protective coatings. The FSMM system consists of transmit and receive spot-focusing horn lens antennas, a vector network analyzer, mode transitions and a computer. Diffraction effects at the edges of the sample are minimized by using spot-focusing horn lens antennas. Errors due to multiple reflections between antennas are corrected by using free-space LRL (line, reflect, line) calibration technique. We have measured complex reflection coefficient of polyurethane based paint which is coated on brass plates.

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