frequency used is 70MHz, circuit is configured according to datasheet, PCB layout is almost the same as EVB,when control voltage>0.8V, Self-excitation will appear; and after input circuit is matched with balun, Self-excitation will still appear;
issue is described below:
1. when control voltage=0.85V,Pout=-23.29@70MHz, output power= -16dBm@860MHz;
2.when control voltage=0.9V,Pout=-19.78dBm@70MHz,output power=4dBm@570MHz;
3.when control voltage=1V, output power=0dBm@40MHz~7000MHz;
enclosed is SCH and PCB layout, thanks!