Q-Factor of Microstrip WGM Resonators Based on YBaCuO and Normal Metal Films

The paper analyzes the dissipative properties of microstrip (planar) whispering gallery mode (WGM) resonators by comparing the Q-factors of resonators based on both HTS and normal metal films. The analysis was performed in the frequency range from 1.5 GHz to 40 GHz. By using numerical simulation of partial Q-factors it is shown that the value of the total (eigen) Q-factor at a temperature of 77 K for the microstrip WGM YBa2Cu3O7-δ- based resonator exceeds the Q-factor value obtained for the similar copper-based resonator in the entire frequency range under study. This superiority is about 2 orders of magnitude at 1.5 GHz and about 5 times at 40 GHz.