중성소자 등가 회로를 이용한 3-dB 원형 하이브리드와 전력 분파기의 소형화에 관한 연구

A Study on the Miniaturization of 3-dB Ring Hybrid and Power Divider Using Lumped-Element Circuit

New design method of small-sized 3-dB $0^{\circ}/180^{\circ}$ ring hybrid and Wilkinson power divider using both lumped elements and distributed elements are presented. At the center frequency of 900 MHz 3-dB $0^{\circ}/180^{\circ}$ ring hybrid and Wikinson power divider are designed and tested. Good agreements are obtained between measured and theoretical modeling results, and at the same time the circuit area is reduced by more than 70% compared with the discributed-type circuits.