Simplified wide-band autotrack traveling wave coupler
US5410318A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1994 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Mar 25, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In accordance with the present invention, a traveling wave coupler generates tracking signals from a circularly polarized microwave signal and includes a waveguide manifold for exciting circular TM.sub.01 and TM.sub.11 modes of said circularly polarized microwave signal. The waveguide manifold includes an input port, a propagation length, and an output port. A coupling arm waveguide includes an auxiliary input port and an auxiliary output port and is aligned and connected to the waveguide manifold along a portion of the propagation length. A coupler located between the waveguide manifold and the coupling arm transforms microwave energy of a TM.sub.01 mode of the circularly polarized microwave signal into a rectangular TE.sub.10 mode in the coupling arm waveguide. The coupling arm waveguide and the coupler generate a difference signal, used to generate the tracking signals, at the auxiliary output port related to the coupled TE.sub.10 mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.