The purpose of this Thesis is to learn the basics of designing and building radio frequency amplifiers.
To achieve the above goal, I cover the fundamental construction, benefits and drawbacks of amplifiers, along with the introduction of transistors used in radio frequency amplifiers. In addition, I also explain the basic principles of amplifier matching, highlighting why these are important during the realization of the circuits. I intend to describe the actual design process on the example of two circuits.
I first built an amplifier that features lower power and operates on smaller frequencies. This comprises two stages and contains bipolar transisors. During the description of this I also cover issues that have significance in case of VHF/UHF-band amplifiers.
The second amplifier is a high power stage operating in the VHF band. I tested its suitability for transferring DVB-T signals. This is a high power circuit based on an LDMOS transistor, whose operational verification will be presented herein.