Matching differential transmitter and receiver between PLL ADF4159 and PA ADF5901

The source ADF5901, LO output have 200 ohm differential impedance and the load (ADF4159) is 1k differential {page11 of rev E. datasheet}.

The reference design is routed without matching, but it obviously need matching. The simplest way is to parallel resistance in end of line to match line and receiver, but how must become ensure that the source can support this low resistor load? also this will cause power consumption, any idea will appreciated