Radio relay channel branch cascade exhibiting uniform transit-time-and-attenuation-characteristics of all channels
Abstract
Abstract A multi-channel radio relay system in which a plurality of high-frequency channels are provided in a link between a transmitting station and a receiving station, said channels being combined to form a high-frequency group, and separated at the receiving end, utilizing therefor, at each station, a cascade circuit of channel branch elements, which comprise circulators and band-pass filters, in which one of the two edge channels located at the respective upper and lower edges of the frequency band to be transmitted, at the transmitting end, is assigned to the channel branch element furthest from the antenna terminal thereat, and the other of such two edge channels, at the receiving end, is assigned to the channel branch element furthest from the antenna terminal thereat, with the band-pass filters of the respective channel elements for the two edge channels being detuned, with respect to their middle frequencies, relative to the middle frequency of their assigned edge channels, by an amount Δ f, in the direction of the middle frequency of the respective channel adjacent in frequency position.
Inventors
- 👤 Hans-Werner Weber
- 👤 Hermann Vollhardt
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |