Procedure for Impedance Matching of Printed-Circuit RF Amplifier - Linear CMOS RF Power Amplifiers for Wireless Applications - page 138

Fig. 10.2 Impedance
matching procedure flowchart
10.2.1 PCB Access Lines Design and Fabrication
The microstrip lines at the input and output of the amplifier are very important and
must be carefully designed. They should have a characteristic impedance of 50
for measurements with standard network analyzers. Furthermore, the length should
be at least λ/ 2 so that any kind of impedance can be matched with a shunt capaci-
tor [ 18 ]. However, it should be as short as possible to reduce losses. It is important
to note that the TRL standards (refer to Sect. 10.2.3 ) should also be designed and
fabricated simultaneously with the evaluation PCB.