Dual circular polarization diversity scheme for microwave link
AssigneeT-Mobile USA, Inc.
InventorChad Au
Life of this patent
Estimating the term…
Abstract
A dual circular polarization diversity scheme reduces the effects of atmospheric fading while providing a more efficient implementation and a more robust wireless link in a telecommunications backhaul network. A circular polarization diversity scheme alleviates issues with misalignment of transmitter and receiver polarization and thereby improves performance. By controlling the feed into the transmit antenna, the output can be a dual circular polarization scheme that simultaneously outputs left-hand circular and right-hand circular polarized radio signal.
Claims20
A backhaul network communications link, comprising:
- a first parabolic antenna configured to transmit a right-hand circular polarized radio signal at a frequency and a left-hand circular polarized radio signal at the frequency;
- and
- a second parabolic antenna configured to receive the right-hand circular polarized radio signal at the frequency and the left-hand circular polarized radio signal at the frequency.
A polarized diversity scheme antenna system, comprising:
- in a telecommunications backhaul network:
- a first antenna having a first aperture;
- and
- a first antenna element configured to broadcast a first circularly polarized signal through the aperture, and further configured to broadcast a second circularly polarized signal through the aperture, the second circularly polarized signal having an orthogonal direction of polarization to the first circularly polarized signal.
A microwave telecommunications link, comprising:
- a first antenna, the first antenna mounted stationary and having:
- a reflective dish;
- a first antenna element that broadcasts a first circularly polarized signal and a second circularly polarized signal, the second circularly polarized signal orthogonal to the first circularly polarized signal;
- a second antenna having:
- a reflective dish;
- and
- a second antenna element that receives the first circularly polarized signal and the second circularly polarized signal.
Dependencies are inferred from the claim text.