Phys.org  August 6, 2019 To reduce the level of interference, devices that carry out the frequency filtering of radio noise are used. Researchers in Russia have designed a miniature stripline resonator on a substrate with a double-sided pattern of strip conductors. The design demonstrates the unique steepness of the slopes of the pass band and the ultra-wide high-frequency stop band, which reaches 100 dB in frequency (attenuation power decay is 10 orders of magnitude) up to a frequency five times the center frequency of the pass band. As several oscillation modes are used in the cavity as working, they managed […]