Question about resistor in Wilkinson power divider design

I am facing one problem in ADS momentum, i am designing Wilkinson power divider. i have done the lay out. and trying to tune it in 1 Ghz. but the problem is coming due the isolation reistor 100Ω, connected b/n the two o/p. i am confused abt the choosing the resistor. what kind of resistor should i choose ? thats why o/p return loss is coming very poor. but, the same ckt when i make in the schematic i am getting good results. i need help as soon as possble.

A surface mount resistor of, say, 1608 size should be okay
at 1GHz. Of course a 1005size is better but difficult to handle.
I assume you are not working on high power application.
I am talking in metric size.
S. H.