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A mixed type branch line coupler combining T-type and pi-type equivalent circuits and keeping main lines characteristic impedance at 50Ω is reported. The new branch line coupler contains only capacitors and open stubs. Two prototypes of two and three branches are designed, simulated and measured. The size reduction reached 40% comparing with the original circuits. The simulated and experimental results...
Circuits designed and fabricated on a transparent and flexible substrate is presented in this paper. The proposed circuits were designed to operate at 2.4GHz and fabricated on commonly used PVC material. Using double-sided parallel-strip line on power divider and branch line designs, we obtained good simulated and measured results within the frequency of interest.
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