Problem about output pin of ADF4351

I am reading the datasheet of ADF4351, and I have a question about its output pins.

The output pins are differential, and I desire a broadband output matching. The recommended method in datasheet(page 27) is using a 50

resistor connected between pin RF_OUT and power supply. But there are two output pins: RF_OUTA+ and RF_OUTA-. How should I add the 50

resistor? Should I use a balun? or just using only one of those pins would be fine?

hi, you can find details in the datasheet or the reference circuits.

Depends how much output power you require from it. If you want to maximize output power and also need wide bandwidth, you'll want to use a transformer balun, with the center tap of the transformer connected to Vvco. Keep in mind that the S22 of this will be poor, despite getting more output power.