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Paper Abstract and Keywords
Presentation 2012-01-10 15:15
Radiation Efficiency Measurement Based on Wheeler Method Using 90-degree 3dB Hybrid Coupler and Sliding Short
Nozomu Ishii, Yohei Kobayashi (Niigata Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) A measurement technique of arbitrary reflection coefficient using 90-degree 3dB hybrid coupler and sliding short is proposed to reduce the uncertainty of the measurement. The measurement system is the same as that with 180-degree 3dB hybrid coupler and sliding short proposed by us. In principle, the reflection coefficients of reference standard and device under test (DUT) are summed up in the transmission coefficient of the measurement system, the reflection coefficient of DUT can be extracted by using the sliding short as the reference standard. This technique can be applicable the measurement of the radiation efficiency of the antenna based on the Wheeler method. To evaluate the uncertainty of efficiency measurement leads to the validity of proposed technique.
Keyword (in Japanese) (See Japanese page) 
(in English) 90-degree 3dB hybrid coupler / Sliding short / Wheeler method / Radiation efficiency / Uncertainty / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 372, AP2011-139, pp. 27-28, Jan. 2012.
Paper # AP2011-139 
Date of Issue 2012-01-03 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP  
Conference Date 2012-01-10 - 2012-01-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Tenbusu Naha 
Topics (in Japanese) (See Japanese page) 
Topics (in English) 2012 Korea-Japan Antennas and Propagation Workshop 
Paper Information
Registration To AP 
Conference Code 2012-01-AP 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Radiation Efficiency Measurement Based on Wheeler Method Using 90-degree 3dB Hybrid Coupler and Sliding Short 
Sub Title (in English)  
Keyword(1) 90-degree 3dB hybrid coupler  
Keyword(2) Sliding short  
Keyword(3) Wheeler method  
Keyword(4) Radiation efficiency  
Keyword(5) Uncertainty  
1st Author's Name Nozomu Ishii  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Yohei Kobayashi  
2nd Author's Affiliation Niigata University (Niigata Univ.)
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Date Time 2012-01-10 15:15:00 
Presentation Time 15 
Registration for AP 
Paper # IEICE-AP2011-139 
Volume (vol) IEICE-111 
Number (no) no.372 
Page pp.27-28 
#Pages IEICE-2 
Date of Issue IEICE-AP-2012-01-03 

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