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US 12,107,313 B2Granted
Methods and apparatuses for reducing passive intermodulation distortion in transmission lines
AssigneeOutdoor Wireless Networks 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.
Claims25
A method for joining a first conductor of a first transmission line to a second conductor of a second transmission line, the method comprising:
- attaching the first conductor to the second conductor with a joint formed by at least one other conductor, wherein the at least one other conductor comprises at least one of more than one metal, an adhesive, and a mechanical fastener;
- and
- covering at least the joint with a layer of one type of metal having a thickness equal to or greater than a skin depth in the layer, wherein the skin depth is a function of (a) material characteristics of the layer and (b) a carrier frequency of a signal configured to propagate in the layer.
A transmission line system, comprising:
- a transmission line trunk line connected to at least one phasing line;
- and
- wherein a conductor of each phasing line is connected to another conductor of the transmission line trunk line by a joint formed by at least one other conductor, wherein the at least one other conductor comprises at least one of more than one metal, an adhesive, and a mechanical fastener;
- wherein at least the joint is covered with a layer of one type of metal having a thickness equal to or greater than a skin depth in the layer, wherein the skin depth is a function of (a) material characteristics of the layer and (b) a carrier frequency of a signal configured to propagate in the layer.
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;
- and
- 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 other conductor, wherein the at least one other conductor comprises at least one of more than one metal, an adhesive, and a mechanical fastener;
- and
- wherein at least the joint is covered with a layer of one type of metal having a thickness equal to or greater than a skin depth in the layer, wherein the skin depth is a function of (a) material characteristics of the layer and (b) a carrier frequency of a signal configured to propagate in the layer;
- wherein the transmission line system is configured to be coupled an antenna to the first duplexer and the Nth duplexer.
11 more elements
Dependencies are inferred from the claim text.