Summary
International Symposium on Antennas and Propagation
2011
Session Number:FrF1
Session:
Number:FrF1-1
Radiation Efficiency Measurement Based on Wheeler Method Using Hybrid Coupler and Sliding Short
Yohei KOBAYASHI, Nozomu ISHII,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
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 validity of the proposed technique.