IP Library › Granted Patent US 12,476,389
Granted Patent B2
US 12,476,389 · App. 18/494,026 · Granted Nov 18, 2025

Dual shifter devices and systems for polarization rotation to mitigate interference

Inventors: Amr Abdelmonem (Northbrook, IL); Anthony Teillet (Trabuco Canyon, CA)
Assignee: ISCO International, LLC
H01Q21/26H01Q3/32H01Q21/08H01Q21/245
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Quick Facts
Patent No.
US 12,476,389
App. No.
18/494,026
Filed
Oct 25, 2023
Granted
Nov 18, 2025
Kind
B2
Art Unit
2845
USPC
343/797
Abstract

Aspects of the subject disclosure may include, for example, receiving, by a double trombone shifter device, signals relating to one or more crossed-dipole radiating elements of an antenna system, performing, by the double trombone shifter device, polarization rotation of the signals to derive output signals having polarizations that are rotated in a manner that results in a virtual physical rotation of the one or more crossed-dipole radiating elements, and providing, by the double trombone shifter device, the output signals to enable avoidance of interference. Other embodiments are disclosed.

Claims (30)

1 . An apparatus, comprising:

a pair of hybrid couplers; and

a dual shifter, the dual shifter and the pair of hybrid couplers being arranged in a symmetrical configuration, the dual shifter being mechanically adjustable to effect polarization rotation of signals relating to a dual-polarized pair of crossed-dipole elements, the polarization rotation reducing an impact of interference on a communications system.

2 . The apparatus of claim 1 , wherein the polarization rotation is performed in a radio frequency (RF) domain, and wherein the interference comprises passive intermodulation (PIM).

3 . The apparatus of claim 1 , further comprising:

a lower substrate having disposed thereon a first pair of transmission lines; and

an upper substrate having disposed thereon a second pair of transmission lines.

4 . The apparatus of claim 3 , wherein the first and second pairs of transmission lines form at least a portion of the dual shifter.

5 . The apparatus of claim 1 , wherein the dual shifter comprises a double trombone shifter that is mechanically adjustable in a linear manner or a dual overlapping arch shifter that is mechanically adjustable in a rotational manner.

6 . The apparatus of claim 1 , further comprising a motor and a drive assembly configured to mechanically adjust the dual shifter to effect the polarization rotation.

7 . A device, comprising:

a pair of hybrid couplers; and

a dual shifter, the dual shifter and the pair of hybrid couplers being arranged in a symmetrical configuration, the dual shifter being manipulatable to effect polarization rotation of signals relating to a dual-polarized pair of crossed-dipole elements, the polarization rotation resulting in a reduced impact of passive intermodulation (PIM) on a communications system.

8 . The device of claim 7 , wherein the polarization rotation is performed in a radio frequency (RF) domain.

9 . The device of claim 7 , further comprising:

a lower substrate having disposed thereon a first pair of transmission lines; and

an upper substrate having disposed thereon a second pair of transmission lines.

10 . The device of claim 9 , wherein the first and second pairs of transmission lines form at least a portion of the dual shifter.

11 . The device of claim 7 , wherein the dual shifter comprises a double trombone shifter that is physically adjustable in a linear manner or a dual overlapping arch shifter that is physically adjustable in a rotational manner.

12 . The device of claim 7 , further comprising a motor and a drive assembly configured to physically adjust the dual shifter to effect the polarization rotation.

13 . The device of claim 7 , wherein the device is implemented in an antenna, in a radio, or in a standalone apparatus that interfaces the antenna and the radio.

14 . A method, comprising:

receiving, by a double trombone shifter device, signals relating to one or more crossed- dipole radiating elements of an antenna system, wherein the double trombone shifter device has a symmetrical configuration; and

performing, by the double trombone shifter device, polarization rotation of the signals to derive output signals having polarizations that are rotated, the output signals enabling a reduced impact of interference on the antenna system.

15 . The method of claim 14 , wherein the interference comprises passive intermodulation (PIM).

16 . The method of claim 14 , wherein the double trombone shifter device comprises a pair of 90 degree hybrid couplers.

17 . The method of claim 14 , wherein the polarization rotation is performed in a radio frequency (RF) domain.

18 . The method of claim 14 , wherein the performing the polarization rotation involves use of a motor and a drive assembly.

19 . The method of claim 14 , further comprising providing the output signals to a radio.

20 . The method of claim 14 , wherein the double trombone shifter device is implemented in the antenna system, in a radio, or in a standalone device that interfaces the antenna system and the radio.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 26, 2023
From: ABDELMONEM, AMR; TEILLET, ANTHONY
To: ISCO INTERNATIONAL, LLC
Reel/Frame 065358/0859 →
Continuity (4)
Continuation 18171823 · Feb 21, 2023
Continuation 17902251 · Sep 2, 2022
Division 17825565 · May 26, 2022
Related Publication 20240055777A1 · Feb 15, 2024
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