,

A New Wide Bandpass Filter Design with Symmetric Attenuation Characteristic

,

A New Branch-Line Hybrid Coupler with Arbitrary Power Division Ratio

,

A Novel Design of Frequency Multipliers Using Composite Right/Left handed Transmission Line and Defected Ground Structure

,

An Active Resonator Using Defected Ground Structure with Islands

,

Pi-형 전송선 급전 구조를 갖는 대역 통과 필터