Techniques for the evaluation and utilization of transistors in the UHF region

In the UHF frequency range where a quarter wavelength is of the order of 10 centimeters, it is usually quite difficult to perform accurate measurements, especially in the case of transistor amplifiers. This paper covers some techniques that can be used to obtain performance data and to construct practical amplifiers for gain and noise figure measurements. As is the case with most circuit techniques, an impedance bridge is absolutely essential.