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wave matching
Interpolated R-peak time and template T-wave matching algorithms were used to determine the characteristic time points of the R-wave and T-wave, respectively.
      
The cap is 0.5mm thick, and it acts as a quarter-wave matching layer at 94GHz.
      
The potential use of small substrate lenses for coupling to antennas at millimeter wave frequencies is investigated by analyzing the focusing properties of dielectric spheres with quarter-wave matching layers.
      
The calculations show that quartz spheres with quarter-wave matching layers, can exhibit good focusing properties down to a radius of about half a free space wavelength.
      
To realize a highly efficient small antenna, high-Tcsuperconducting thick films with zirconia cores are adopted in order to fabricate both a self-resonating small helical radiator and a quarter-wave matching circuit.
      
0.05λ helical radiators and quarter-wave matching and branch circuits were designed for an array antenna with a 0.09λ radiator spacing, to obtain a superdirective radiation pattern at 900 MHz.
      
A quarter wave matching section was introduced into the waveguide just upstream of the coupling slot to improve the VSWR to better than 1.05.
      
Since the turnstile changed the impedance of the HGA, the -wave matching transformer required redesign.
      
The window is made from HDPE and is two wavelengths thick, with quarter-wave matching grooves machined on both sides.
      
 

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