Due to the rapidly increasing number of high-frequency applications, the resources below 1 GHz are becoming scarce. For this reason, the frequency range up to and above 40 GHz is becoming more and more important, as is the need to understand the frequency characteristics of passive components in microwave applications. In this paper the high-frequency behavior of 0805 and 0603 size chip resistors will be shown from 0.1 GHz to 20 GHz, and compared with special trimmed 0204 and 0102 size cylindrical resistors.