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Recently, the S-parameter method using a vector network analyzer was proposed whereby the differential input impedance of a balanced-fed antenna were obtained. To improve measurement accuracy of the S-parameter method, the dependence on thickness of the semi-rigid cable used for the measurement jig is obtained from the results of calculations using the FDTD method. Three types of jigs each made from...
W-band T-junction and bifurcated substrate integrated waveguide (SIW) diplexers are proposed in this paper. Instead of conventional 0.127 mm substrate for W-band circuitry, a 0.254 mm substrate is chosen for Q-value improvement A WR-10 waveguide to 0.254 mm SIW E-plane transition is developed for measurement purpose. Two diplexers are implemented.
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