Metamaterial CRLH Structure-based Balun for Common-Mode Current Indicator

Title & Authors
Metamaterial CRLH Structure-based Balun for Common-Mode Current Indicator
Kahng, Sungtek; Lee, Jinil; Kim, Koon-Tae; Kim, Hyeong-Seok;

Abstract
We proposed a new PCB-type common-mode current($\small{I_c}$) and differential-mode current($\small{I_d}$) detector working for fast detection of $\small{I_c}$ and $\small{I_d}$ from the differential-mode signaling, with miniaturization effect and possibility of cheaper fabrication. In order to realize this device, we suggest a branch-line-coupler balun having a composite right- and left-handed(CRLH) one-layer microstrip phase-shifting line as compact as roughly $\small{{\lambda}_g/14}$. The presented balun obviously is different from the conventional bent-&-folded delay lines or slits on the ground for coupling the lines on the top and bottom dielectrics. As we connect the suggested balun output ports of the differential-mode signal lines via the through-port named U and coupled-port named L, $\small{I_c}$ and $\small{I_d}$ will appear at port $\small{{\Delta}}$ and port $\small{{\Sigma}}$ of the present device, in order. The validity of the design scheme is verified by the circuit-and numerical electromagnetic analyses, and the dispersion curve proving the metamaterial characteristics of the geometry. Besides, the examples of the $\small{I_c}$ and $\small{I_d}$ indicator are observed as the even and odd modes in differential-mode signal feeding. Also, the proposed device is shown to be very compact, compared with the conventional structure.
Keywords
Metamaterial;Balun;Common-mode current detection;Composite right- and Left-handed;Phase shifter;
Language
English
Cited by
1.
Semi-lumped Balun Transformer using Coupled LC Resonators,;;;

Journal of Electrical Engineering and Technology, 2015. vol.10. 3, pp.1154-1161
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