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http://dx.doi.org/10.5762/KAIS.2014.15.5.3139

Design of a Size-reduced Ring Hybrid Coupler Using an Artificial Dielectric Substrate  

Lim, Jongsik (Department of Electrical Engineering, Soonchunhyang University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.5, 2014 , pp. 3139-3145 More about this Journal
Abstract
This paper describes the design of a size-reduced ring hybrid coupler for microwave band using an artificial dielectric substrate(ADS). ADS structure adopts the second substrate on which has lots of the metalized via-holes. The effective capacitance and effective dielectric constant per unit length of ADS increases compared to the normal substrate due to the via-holes. This enables the physical length of microstrip transmission line to be reduced by adopting ADS instead of the normal substrate. In order to present an example of size-reduction of microwave wireless circuit by ADS, a size-reduced 3GHz ring hybrid coupler is designed, fabricated and measured in this work. The designed coupler has the smaller size from the normal one by 65% due to the ADS, while no critical degradation from ideal performances is observed. The measured power division ratio at two output ports are -3.05dB and -3.135dB, respectively. In addition, the phase differences are 3o for in-phase division and 176o for out of phase split. The measured performances are so similar to ideal ones, and prove the design of size-reduced ring hybrid coupler using ADS is successful.
Keywords
ADS; microstrip line; ring hybrid coupler;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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