DESIGN OF T-SPLIT POWER DIVIDERS USING DUMBBELL SHAPED DGS

 

¹Tamasi Moyra, ²Susanta Kumar Parui, ²Santanu Das

 

¹Department of Electronics and Communication Engineering,

 National Institute of Technology, Agartala

²Department of Electronics and Telecommunication Engineering,

 Bengal Engineering and Science University, Shibpur,

 Howrah – 711 103, INDIA

 

Received August 3, 2012

 

Abstract. Power dividers and power combiners are passive microwave components for power dividing and power combining. In this paper attention has been given towards the implementation of equal power divider using conventional 50 microstrip line and dumbbell shaped defected ground structures (DGS).  DGS increase the effective inductance and capacitance of the line, supporting slow-wave propagation. Thus, it increases the effective line impedance of the microstrip line. Consequently, all passive and active components that are implemented using DGS have a miniaturized size compared to conventional components. In this paper one 3 dB or equal power divider has been implemented at 1.2 GHz in the first step. In the next part of the paper, one unequal power divider of dividing ratio 2:1 has been designed using DGS with microstrip line. Those dividers have wide applications in microwave circuits and feeds of array antennas.

Keywords: microstrip, defected ground structure, equal power divider, unequal power divider.

Аннотация. Предложена и исследована конструкция микрополоскового симметричного (3дБ) и несимметричного  (2:1) делителя мощности. Для согласования делителей используется отверстие в подложке в форме гантели. Неоднородность увеличивает эквивалентную индуктивность и улучшает согласование.

Ключевые слова: микрополосковая линия, неоднородная подложка, симметричный делитель  мощности, несимметричный делитель мощности.