Hi, I have a noob RF theoretical question as I try to understand the design of RF amplifiers. As an example of an amplifier I am considering to build, I am looking at the MRF101AN LDMOS device, and looking to build an amplifier in the 88-108MHz range. From the datasheet, when I look at the impedance numbers they are listed as below. Code: f(MHz) Zsource Zload 87.5 8.52 + j12.46 13.15 + j5.4898 98 10.59 + j14.03 13.12 + j5.2110 108 812.21 + j15.02 10.74 + j5.52 Next, when I look at the reference circuit, it looks like this: Let's say I am looking at the input matching network. From the datasheet, the values of C1, C2 are 200pF, and L1 is 36nH. Using this calculator, if I punch in the following numbers (frequency 98e6 i.e. 98MHz, source impedance: 10.59 + j14.03, load impedance: 50 + j0.0), the values I get for hi-pass T-matching network are these: C1: -35pF, C2: 31pF, L1: 42nH) which are clearly different than the values used above in the datasheet. I'm trying to understand the circuit and the numbers, so any pointers, or clarifications would be much appreciated. Thanks in advance.