Low pass filter

When a plurality of RF signals having different frequer bands are output at the same time by carrier aggregation, a switch element allows parallel connection between two capacitance elements such that a low pass filter has a first cut-off frequency that is lower than the frequency of an intermodulat...

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Bibliographic Details
Main Author Fukasawa, Mikiko
Format Patent
LanguageEnglish
Published 21.05.2019
Subjects
AMPLIFIERS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
TRANSMISSION
WAVEGUIDES
WIRELESS COMMUNICATIONS NETWORKS
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Summary:When a plurality of RF signals having different frequer bands are output at the same time by carrier aggregation, a switch element allows parallel connection between two capacitance elements such that a low pass filter has a first cut-off frequency that is lower than the frequency of an intermodulation distortion signal generated by the carrier aggregation. When an RF signal of a frequency band is output, the switch element releases parallel connection between the two capacitance elements such that the low pass filter has a second cut-off frequency that is higher than the first cut-off frequency.
Bibliography:Application Number: US201816031112