Frequency multiplexer for use with instruments for measuring passive intermodulation (PIM)
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United States of America Patent
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May 22, 2018
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app pub date -
Jul 22, 2015
filing date -
Jul 22, 2015
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Abstract
A device for combining two or more tones generated by a measuring instrument for output to a port includes a combiner point, a transmission path extending from the combiner point to the port, two or more signal source filters each adapted to be connected to a respective signal source of the measuring instrument and one or more receiver filters each adapted to be connected to a receiver of the measuring instrument. Each of the signal source filters and receiver filters includes a cavity, a resonator arranged within the cavity and connected with the combiner point at a distance of one quarter of a wavelength of a signal having a center frequency of the passband of the filter, and a solid dielectric filter connected with the cavity.
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