AUTOMATIC FREQUENCY METER

摘要

An automatic frequency meter is disclosed including a resonant frequency structure coupled to a transmission line with the frequency of the resonant structure continuously swept and change in level of the signal on the transmission line detected for a determination of the resonant frequency of the structure and therefore the frequency of the signal. The resonant frequency structure can be YIG coupled to the transmission line in an absorbtion mode. The YIG can be coupled to the line by positioning adjacent a slot in the center conductor with the slot aligned parallel to the magnetic field for coupling to the 210 mode or perpendicular to the magnetic field for coupling to the 110 mode of the YIG.