DocumentCode :
3238084
Title :
Development of a novel tapered balun for the UWB UHF coupler
Author :
Choi, Jae-Gu ; Yi, Sang-Hwa ; Kim, Kwang-Hwa
Author_Institution :
Power Facility Diagnosis Res. Group, KERI, Changwon, South Korea
fYear :
2004
fDate :
23-26 May 2004
Firstpage :
493
Lastpage :
496
Abstract :
The UWB UHF coupler for GIS PD detection requires a balun (balance to unbalance transformer) to show its inherent UWB characteristics. In order to reduce the size of the balun and to make it practical in the conventional GIS, a novel tapered coaxial balun with a dielectric was proposed for the UWB UHF coupler. The performance of the proposed balun was verified through a series of simulations, measurements and experiments. As a result, both the conventional balun and the proposed balun, which has a length equal to one third of that of the conventional balun, demonstrated good S11 characteristics, whereas the efficiency of the proposed balun increased as much as about 30% in comparison to the conventional one.
Keywords :
UHF couplers; dielectric materials; gas insulated substations; partial discharge measurement; power transformers; ultra wideband technology; GIS; PD detection; S11 characteristic; UWB UHF coupler; coaxial balance to unbalance transformer; coaxial balun; dielectric material; size reduction; Antenna feeds; Coaxial components; Conductors; Connectors; Dielectric loss measurement; Dielectric measurements; Geographic Information Systems; Impedance matching; Reflection; UHF measurements;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Modulator Symposium, 2004 and 2004 High-Voltage Workshop. Conference Record of the Twenty-Sixth International
Print_ISBN :
0-7803-8586-1
Type :
conf
DOI :
10.1109/MODSYM.2004.1433621
Filename :
1433621
Link To Document :
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