@inproceedings{oai:niigata-u.repo.nii.ac.jp:00030913,
 author = {Kobayashi, Yohei and Ishii, Nozomu},
 book = {International Symposium on Antennas and Propagation, International Symposium on Antennas and Propagation},
 issue = {FrF1-1},
 month = {Oct},
 note = {The use of the subtraction function of a 180 - degree 3dB hybrid coupler is proposed in a method of removing the uncertainty of the reflection coefficient measurement. The authors have proposed and examined a technique of measuring arbitrary reflection coefficients using a hybrid coupler and a sliding short. It has a possibility of accurate measurement of the reflection coefficient whose magnitude is close to unity, because S parameters of the components used in the measurement system are measured In this paper, we apply it to the measurement of the radiation efficiency of the antenna based on the Wheeler method and show the valid ity of the proposed technique., International Symposium on Antennas and Propagation (ISAP 2011) : October 25 - 28, 2012 Lotte Hotel Jeju, Jej, Korea.},
 publisher = {The Institute of Electronics, Information and Communication Engineers},
 title = {Radiation Efficiency Measurement Based on Wheeler Method Using Hybrid Coupler and Sliding Short},
 volume = {2011},
 year = {2011}
}