Microwave delay equalizer comprising a pair of distributed-constant_ elements as a directional coupler
US4197514A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1977 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Sep 20, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/148
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a microwave delay equalizer for an input signal of a microwave frequency having an inevitable delay distortion, a directional coupler and a pair of resonators are placed, respectively, on a center area of a conductive base member and on those side areas thereof which lie on both sides of the center area. The coupler comprises a pair of distributed-constant elements electromagnetically coupled to each other either with an air space or a dielectric plate interposed therebetween and to the respective resonators to derive from the input signal supplied to one of the elements a delay equalized output signal in the other element. Each element has a length equal to an odd multiple of a quarter wavelength of the signal travelling therealong. Each resonator consists of at least one resonance piece. For a dielectric base member, the elements possessed preferably of corrugated sides opposing each other with a zigzag-shaped area of the center area left therebetween and the resonance pieces are formed directly on the center and side areas by conductive patterns together with a pair of conductors which are connected to one end each of the resonance pieces and are to be grounded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.