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US 2020/0350652 A1Published application
Methods and apparatuses for reducing passive intermodulation distortion in transmission lines
AssigneeCommScope Technologies LLC
InventorsFrantisek Ondracek, Tomas Ther, Jiri Kasik
Life of this patent
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Abstract
Methods and apparatuses for reducing passive intermodulation distortion arising from a joint attaching conductors by forming the joint with a single metal or covering the joint with a single layer of metal having a thickness greater than a skin depth of the frequency of signals propagating through the joint.
Claims31
A method for joining a first conductor of a first transmission line to a second conductor of a second transmission line, comprising:
- attaching the first conductor to the second conductor with a joint formed by at least one other conductor, where the at least one other conductor comprises one or more types of metal;
- and
- if the at least one other conductor comprises at least one of more than one metal and a mechanical fastener, then the method further comprises covering at least the joint with a layer of one type of metal having a thickness equal to or greater than a skin depth corresponding to a carrier frequency of signals, where the transmission lines are configured to propagate the signals.
A transmission line system, comprising:
- a transmission line trunk line connected to at least one phasing line;
- wherein a conductor of each phasing line is connected to a conductor of the transmission line trunk line by a joint formed by at least one conductor, where the at least one conductor comprises one or more metals;
- and
- if the at least one other conductor comprises more than one metal, then at least the joint is covered with a layer of one metal having a thickness equal to or greater than a skin depth corresponding to a carrier frequency of signals, where the transmission line system is configured to propagate the signals.
1 more element
A remote antenna unit, comprising:
- a first primary uplink signal path;
- a first primary downlink signal path;
- a Nth primary uplink signal path, where N is an integer greater or equal to two;
- a Nth primary downlink signal path;
- a first duplexer coupled to the first primary uplink signal path and the first primary downlink signal path;
- a Nth duplexer coupled to the Nth primary uplink signal path and the Nth primary downlink signal path;
- wherein the first duplexer and the Nth duplexer are configured to be coupled to a transmission line system;
- wherein the transmission line system comprises
- a transmission line trunk line connected to a first phasing line and an Nth phasing line;
- wherein a conductor of each phasing line is connected to a conductor of the transmission line trunk line by a joint formed by at least one conductor, where the at least one conductor comprises one or more metals;
- and
- if the at least one other conductor comprises more than one metal, then the method further comprises covering at least the joint with a layer of one metal having a thickness equal to or greater than a skin depth corresponding to a carrier frequency of signals, where the transmission line system is configured to propagate the signals;
- and wherein the transmission line system is configured to couple an antenna to the first duplexer and the Nth duplexer.
10 more elements
Dependencies are inferred from the claim text.