Dielectric Resonators as Microstrip Circuit Elements

Dielectric resonators may be used as hybrid circuit elements in microstrip transmission line circuits. These resonators may function as bandpass filters, bandstop filters, passive stabilization cavities for solid-state diode oscillators, or as reference cavities for Pound discriminators. Dielectric resonators are small size and high Q which makes them desirable for microstrip circuits where deposited resonators are large at lower microwave frequencies and have limited Q´s. The purpose of this paper is to present a simple design procedure for cylindrical TiO ₂ resonators on microstrip and to illustrate the use of such a resonator in a practical Pound discriminator circuit.