stripline discontinuity

hi all,
in my circuit my mainline is a stripline of 50ohm impedance, going in direction Y,
but there must be a port in the top cover of the stripline,so how to design the bend
of the stripline to the top cover?

thanks

You can route the same in the same layer, but need to keep the gnd reference adjacent with proper di-electric heights for 50 ohms