US3810255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency translation routing communications transponder
Assignee: Comsat Corp
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Filing: 1971-06-10
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Granted: 1974-05-07
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Expires: 1991-06-10
Abstract
Abstract Frequency bands in spot beams received by a satellite transponder are routed to transmitted spot beams. Every band in all received beams are frequency translated into separate bands within the transponder. The separate bands result in a total bandwidth within the transponder equal to the number of received spot beams times the bandwidth of each spot beam. The total bandwidth is then divided among the transmitters - each divided portion being reconverted into the transmitter bandwidth. Routing of a single receive band is accomplished by mixing the band with a local oscillator signal having a frequency whose value causes the mixer output to assume a particular band within the total bandwidth - the particular band being diverted to the transmitted spot beam of interest.
Inventors
- 👤 M Wachs
- 👤 A Berman
- 👤 C Mahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:28
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/204; H04B7/2045; H04J1/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A frequency translation routing transponder comprising, a. means for receiving a plurality of composite signals each of said composite signals comprising a plurality of frequency slots occupying frequency bands which overlap the frequency bands occupied by other frequency slots in other ones of said plurality of composite signals, b. first translating means for translating each frequency slot within said plurality of composite signals into a separate, substantially non-overlapping, band of frequencies, c. filter means for separating the total frequency band occupied by said plurality of composite signals following said translation into separate frequency segments, and d. second translating means for translating each of said segments into a frequency band suitable for transmission, said suitable frequency bands overlapping in frequency.
Claim 2
Dependent Claim
119 words
A frequency translation routing transponder comprising, a. means for receiving a plurality of composite signals each of said composite signals comprising a plurality of frequency slots occupying frequency bands which overlap the frequency bands occupied by other frequency slots in other ones of said plurality of composite signals, b. first translating means for translating each frequency slot within said plurality of composite signals into a separate, substantially non-overlapping, band of frequencies, c. filter means for separating the total frequency band occupied by said plurality of composite signals following said translation into separate frequency segments, and d. second translating means for translating each of said segments into a frequency band suitable for transmission, said suitable frequency bands overlapping in frequency.
Claim 3
Dependent Claim
76 words
A frequency translating routing transponder as claimed in claim 1 wherein said first translating means comprises, a. filter means for dividing said received plurality of composite signals into said frequency slots, b. means for generating a plurality of local oscillator frequencies, c. means for mixing selected local oscillator frequencies with the signals occupying said frequency slots to provide a total band of frequencies occupied by said plurality of composite signals with substantially no overlapping of frequencies.
Claim 4
Dependent Claim
53 words
A frequency translation routing transponder as claimed in claim 2 wherein said means for mixing comprises an individual mixer for each of said frequency slots, each of said mixers having the signals occupying a given frequency slot connected to one input thereof, and a local oscillator frequency connected to a second input thereof.
Claim 5
Dependent Claim
78 words
A frequency translation routing transponder as claimed in claim 3 wherein said means for mixing further comprises, a. power divider means connected to said generating means producing attenuated replica of said plurality of local oscillator frequencies at multiple output terminals, b. a plurality of electronically tuneable high-Q filters, each having its input connected to a respective one of said power divider outputs, and its output connected to the second input of a respective one of said individual mixers.
Claim 6
Dependent Claim
21 words
A frequency translation routing transponder as claimed in claim 4 wherein each of said electronically tuneable filters is a YIG filter.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |