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Amplitude balanced two-section quadrature hybrid using a microstrip lines is proposed. The proposed microstrip quadrature hybrid with unequally reduced impedances compared to the original values of longitudinal and transverse branches was optimized using HFSS simulations. Two-section microstrip line hybrid has measured bandwidth of 34%, good amplitude balance of ± 0.35 dB, good reflection and isolation...
It is important to accurately measure the ICRF antenna parameters for the estimation of RF power transmission to KSTAR fusion plasmas. Due to the complexity of a 4-loop antenna with mutual couplings, it is not easy to measure those parameters directly. In this presentation, a method to determine those antenna parameters more precisely by applying measured S-parameters to a coupled transmission line...
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