Dual band multimode coaxial tracking feed
US6323819A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Oct 5, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q13/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A dual band multimode coaxial antenna feed has an inner section of longitudinal hollow waveguide having first and second orthogonal mode transducers that interface first and second orthogonally polarized cylindrical waveguide TE.sub.11 mode signals lying in a first upper (e.g., Ka) frequency band. An outer coaxial waveguide section has a Potter horn surrounding the inner waveguide section, which terminates at a polyrod. The outer section includes third and fourth orthogonal mode transducers that interface orthogonally polarized coaxial waveguide TE.sub.11 mode signals lying in a second lower (e.g., X) frequency band. A tracking port coupled to the outer coaxial waveguide section provides an output representative of the difference pattern of the radiation profile produced by transverse electromagnetic TEM mode signals generated and propagating in the outer coaxial waveguide. A mode suppressor in the outer waveguide section adjacent its two orthogonal mode transducers locally suppresses TEM signals in their vicinity. A broadband compensated polarizer is installed in the inner waveguide section operating in the high band, and a broadband coaxial compensated polarizer is installed in t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.