ADS design of a positive feedback oscillator ( 10，6Ghz ) Urgent

Hi, I need a design of a positive feedback oscillator (at 10.6 GHz).
Or if someone can send me detailed steps to design this oscillator.

Question :
for exemple for a MLIN ( MICROWAVE line on ADS ), we can have W > L. because i wanted replace a TLIN line ( Z=35ohm, landa/4, E=90 deg to transform 25ohm to 50ohm) by MLIN and Linecalc gave me MLIN with W>L ! is it possible ?

Thanks in advance,
khalid

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