Ku band microstrip filter

Hi to all,
I have to design (I am using CST) a compact microstrip filter for ku band.
I do not know how to design this device.
Can anyone recommend me any book or reference please?

Thank you so much in advance.
Regards.

easy 50 ohms line with a stub at 74 ohm (if I remember well).. what tool are you using? What RF losses are u expecting?

Regards,
Lupin

I am using CST.
And the insertion losses must be as small as possible, 0.2 or 0.3 dB would be good values.

Thank you so much.
Bye