Bypassable radio frequency filters
AssigneeCommScope Italy S.r.l.
InventorsGiuseppe Resnati, Alessandro Maurizio Delzanno, Peter J. Bisiules, XiaoHua Hou
Life of this patent
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Abstract
Devices having bypassable radio frequency (RF) filters are provided. A device includes a bypassable RF filter and an adjustable-length RF transmission line that is coupled thereto. Moreover, the device includes a component that is coupled to the adjustable-length RF transmission line and is configured to change an electrical length of the adjustable-length RF transmission line between a first length and a second length. Related methods of bypassing the bypassable RF filter are also provided.
Claims21
A device, comprising:
- a radio frequency (RF) signal input and an RF signal output;
- a bypassable RF notch filter that is coupled between the RF signal input and the RF signal output, the filter being configured to reject RF signals in a predefined frequency band;
- an adjustable-length RF transmission line that is coupled to the bypassable RF filter;
- and
- an electronic component that is coupled to the adjustable-length RF transmission line and is configured to change an electrical length of the adjustable-length RF transmission line between a first length and a second length,
- wherein the device is configured to provide an RF signal that bypasses the bypassable RF filter when the adjustable-length RF transmission line has the second length and that does not bypass the bypassable RF filter when the adjustable-length RF transmission line has the first length.
A device, comprising:
- first and second radio frequency (RF) transmission paths between an RF signal input and an RF signal output;
- a bypassable RF filter that is in the first RF transmission path;
- an RF circulator coupled to the RF signal input or the RF signal output;
- and
- a component, other than a solid-state switch and other than an electromechanical relay, that is coupled between the RF signal input and both of the first and second RF transmission paths,
- wherein the component is configured to switch between coupling the RF signal input to the first RF transmission path and coupling the RF signal input to the second RF transmission path.
A base station antenna, comprising:
- a plurality of radiating elements;
- a bypassable radio frequency (RF) notch filter that is coupled to a first of the radiating elements and can route signals through the filter during a first mode of operation and can bypass the filter during a second mode of operation, the RF notch filter being configured to reject RF signals in a predefined frequency band;
- an adjustable-length RF transmission line that is coupled to the bypassable RF filter;
- and
- a component that is coupled to the adjustable-length RF transmission line and is configured to change an electrical length of the adjustable-length RF transmission line between a first length and a second length,
- wherein the base station antenna is configured to provide an RF signal that bypasses the bypassable RF filter when the adjustable-length RF transmission line has the second length and that does not bypass the bypassable RF filter when the adjustable-length RF transmission line has the first length.
Dependencies are inferred from the claim text.