Matching and Filtering

For a RF circuit chain (basic direct conversion demodulator for 1,5 GHz to 2,4 GHz) I'm trying to match the ADL5382 to a AD8372 through a HPF with low cutoff frequency to negate the DC offset.

The problem I'm having is the 50 ohm differential output of the demodulator (ADL5382) vs. the differential input of 150 ohm of the VGA (AD8372).

Especially since the datasheet specifies the ADL5382 should see a 450 to 500 ohm load for maximum gain.

As an RF student I'm lost at the moment and don't see how I can connect both IC's through a balanced HP-filter

Any help will be greatly appreciated :D

Divide by this impedances whatever are, and then design your HPF for single ended mode ( don't forget to divide input and output impedances as well ) and then make them in one by connecting mirror.
If you need more explanation, I post something here..

If I design the filter for an ouput impedance of 500 ohm (as per ADL5382 instructions) won't this react badly with the true 150 ohm input impedance of the VGA?

The attached image is a simple 3rd order HPF designed for an ouput impedance of 500 ohm.

However, when attaching this circuit to a 150 ohm load the attenation is over 10 dB at cutoff