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Applications of the finite difference techniques to the compensated VIP 3 dB directional coupler

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2 Author(s)
Chuandong Zhao ; Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Ube, Japan ; Awai, I.

A new and simple compensated structure for a vertically installed planar (VIP) 3 dB directional coupler has been studied theoretically as well as experimentally by combining an improved 2-D-general finite difference (2-D-GFD) design procedure with a three-dimensional finite difference time domain (3-D-FDTD) method. The obtained full wave analysis results agree well with the measured ones. The investigations have shown that with this planar compensated structure, a better performance of the VIP coupler in the L-band can be realized by only using the same kind of dielectric substrate for its vertical and horizontal one

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:44 ,  Issue: 11 )