Can someone help with defected ground unequal Wilkinson power divider ?

10 October 2017 0 4K Report

Hello,

To get better understanding for unequal power divider, I'm trying to replicate the published work "A 1: 6 Unequal Wilkinson Power Divider" in http://ieeexplore.ieee.org/abstract/document/4057782/

My problem is that my results doesn't mach the published results.

For a 1:6 power divider, Z2 impedance should be 34.5 and R2 should be 20.4 ohm. The width should be 4.05 mm and 7.88 mm respectively when using 0.79 mm thick RO5880 substrate (DK=2.2). But I've noticed from the layout and the board photograph that the width of Z2 and R2 are almost the same.

Can someone explain why they appear almost the same width?

Thanks

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