System for providing local originating signals with direct broadcast satellite television signals

• US 5,483,663 A
• Filed: 04/05/1994
• Issued: 01/09/1996
• Est. Priority Date: 04/05/1994
• Status: Expired due to Term

• Current Assignee: Diversified Communication Engineering Incorporated
• Original Assignee: Diversified Communication Engineering Incorporated
• Inventors: Tawil, Saleem
• Primary Examiner(s): Kostak, Victor R.
• Assistant Examiner(s): ACOSTA, JUAN G
• Application Number:
  US08/222,896
• Time in Patent Office: 644 Days
• Field of Search: 455/3.2, 455/188.1, 455/180.1, 455/20, 348/470, 348/21, 348/6, 348/12, 348/13
• US Class Current: 725/68
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving
• CPC Class Codes: H04N 7/20 Adaptations for transmission via a GHz frequency band, e.g. via satellite

Abstract

An apparatus for providing local programming with direct broadcast satellite transmissions includes a terrestrial transmitter for transmitting converted local channel signals in a first frequency band. The first frequency band is contained within a satellite broadcast frequency band in which the direct broadcast satellite channels are transmitted. The apparatus also includes at each user or subscriber location, a first antenna for receiving the converted local channel signals from the terrestrial transmitter and a second antenna for receiving a direct broadcast satellite channel signals from the satellite. The apparatus further includes a combiner for combining the converted local channel signals and the direct broadcast satellite channel signals on a single propagation path. A signal processor/decoder processes the combined signals on the single propagation path to produce a desired channel output to drive a television set. To the processor/decoder the combined channel signal appears as if it had been all broadcast directly from the satellite. Therefore, the apparatus requires no additional receiver for receiving local programming along with regional and national programming provided by satellite transmission.

Claims

1. An apparatus for simultaneously providing local originating channels along with direct broadcast satellite television channels transmitted from a satellite, the apparatus comprising:

(a) a terrestrial transmitter located at a terrestrial broadcasting location for transmitting converted local channel signals in a first frequency band, the first frequency band contained within a satellite broadcast frequency band;

(b) a first antenna located at a user location remote from the terrestrial broadcasting location for receiving from the terrestrial transmitter the converted local channel signals in the first frequency band;

(c) a second antenna at the user location for receiving from the satellite direct broadcast satellite television channel signals in the satellite broadcast frequency band;

(d) combining means at the user location for combining the converted local channel signals received by the first antenna and the direct broadcast satellite television signals received by the second antenna to form combined television signals in the satellite broadcast frequency band on a single signal path; and

(e) signal processing means at the user location for receiving the combined television signals from the combining means and processing the combined television signals to produce a desired channel output signal.

2. The apparatus of claim 1 further comprising:

(a) a terrestrial receiver located at the terrestrial broadcasting location for receiving local channel signals; and

(b) a signal converter located at the terrestrial broadcasting location for converting the local channel signals to converted local channel signals in the first frequency band.

3. The apparatus of claim 1 wherein the first antenna is selected from the group consisting of circular waveguide antennas, feed-horn antennas, flat plate antennas, slot antennas, dipole antennas, and multi-dipole antennas.

4. The apparatus of claim 1 wherein the second antenna comprises:

(a) at least one reflector for reflecting and concentrating the direct broadcast satellite television channel signals;

(b) a signal collector for collecting the direct broadcast satellite television channel signals concentrated by the reflector; and

(c) an antenna probe extending into the signal collector for receiving the direct broadcast satellite television channel signals.

5. The apparatus of claim 4 wherein the signal collector is selected from the group consisting of feed-horn assemblies and circular wave guides.

6. The apparatus of claim 1 wherein the second antenna is a flat plate antenna.

7. The apparatus of claim 1 wherein the satellite broadcast frequency band has an approximate lower frequency limit of 12.2 Giga-Hertz and an approximate upper frequency limit of 12.7 Giga-Hertz.

8. The apparatus of claim 1 wherein the combining means comprises a stripline combiner mounted on a low noise block converter, the stripline combiner including:

(a) a first input connected to receive converted local channel signals from the first antenna;

(b) a second input connected to receive direct broadcast satellite television channel signals from the second antenna; and

(c) an output connected to deliver the combined television signals to signal processing elements of the low noise block converter.

9. An apparatus for simultaneously receiving signals from both a satellite source and a terrestrial source, the apparatus comprising:

(a) a first antenna for receiving from a terrestrial transmitter converted local channel signals in a first frequency band, the first frequency band contained within a satellite broadcast frequency band;

(b) a second antenna for receiving from the satellite source direct broadcast satellite television channel signals in the satellite broadcast frequency band; and

(c) combining means for combining the converted local channel signals received by the first antenna and the direct broadcast satellite television channel signals received by the second antenna to form combined television channel signals in the satellite broadcast frequency band on a single signal path.

10. The apparatus of claim 9 wherein the first antenna is selected from the group consisting of circular waveguide antennas, feed-horn antennas, flat plate antennas, slot antennas, dipole antennas, and multi-dipole antennas.

11. The apparatus of claim 9 wherein the second antenna comprises:

(a) at least one reflector for reflecting and concentrating the direct broadcast satellite television channel signals;

(b) a signal collector for collecting the direct broadcast satellite television channel signals concentrated by the reflector; and

(c) an antenna probe extending into the signal collector for receiving the satellite television channel signals.

12. The apparatus of claim 11 wherein the signal collector is selected from the group consisting of feed-horn assemblies and circular wave guides.

13. The apparatus of claim 9 wherein the second antenna is a flat plate antenna.

14. The apparatus of claim 9 wherein the satellite broadcast frequency band has an approximate lower frequency limit of 12.2 Giga-Hertz and an approximate upper frequency limit of 12.7 Giga-Hertz.

15. The apparatus of claim 9 wherein the combining means comprises a stripline combiner mounted on a low noise block converter, the stripline combiner including:

(a) a first input connected to receive converted local channel signals from the first antenna;

(b) a second input connected to receive direct broadcast satellite television channel signals from the second antenna; and

(c) an output connected to deliver the combined television channel signals to signal processing elements of the low noise block converter.

16. In a system for providing direct broadcast satellite television channels having a satellite transmitter for transmitting direct broadcast satellite television channel signals in a satellite broadcast frequency band, a satellite signal antenna for receiving direct broadcast satellite television channel signals at a user location, and signal processing means at the user location for receiving the direct broadcast satellite television channel signals and processing the signals to produce a desired channel output, the improvement comprising:

(a) a terrestrial transmitter for transmitting converted local channel signals in a first frequency band, the first frequency band contained within the satellite broadcast frequency band;

(b) a first antenna at the user location for receiving from the terrestrial transmitter the converted local channel signals in the first frequency band; and

(c) combining means at the user location for combining the converted local channel signals received by the first antenna and the direct broadcast satellite television signals received by the second antenna to form combined television signals in the satellite broadcast frequency band on a single signal path for processing by the signal processing means.

17. The system of claim 16 wherein the combining means comprises a stripline combiner mounted on a low noise block converter, the stripline combiner including:

(a) a first input connected to receive converted local channel signals from the first antenna;

(b) a second input connected to receive direct broadcast satellite television channel signals from the second antenna; and

(c) an output connected to deliver the combined television signals to signal processing elements of the low noise block converter.

18. A method for providing local originating channels along with direct broadcast satellite television channels transmitted from a satellite, the method comprising the steps of:

(a) transmitting converted local channel signals in a first frequency band from a terrestrial transmitter location, the first frequency band contained within a satellite broadcast frequency band;

(b) at a user location remote from the terrestrial transmitter location, receiving the converted local channel signals in the first frequency band;

(c) receiving at the user location direct broadcast satellite television channel signals in the satellite broadcast frequency band, the direct broadcast satellite television channel signals being transmitted from the satellite;

(d) combining the converted local channel signals and the direct broadcast satellite television signals to form combined television signals in the satellite broadcast frequency band on a single signal path; and

(e) processing the combined signals to produce a desired channel output signal.

19. The method of claim 18 further comprising the steps of:

(a) receiving at the terrestrial transmitter location local channel signals; and

(b) converting the local channel signals to converted local channel signals in the first frequency band.

20. The method of claim 18 wherein the step of combining the converted local channel signals and the direct broadcast satellite television signals to form the combined television signal is performed with a stripline combiner mounted on a low noise block converter and further including the step of:

(a) directing the combined television signals to signal processing elements of the low noise block converter.

21. An apparatus for simultaneously providing local originating channels, along with direct broadcast satellite television channels transmitted from a satellite, the apparatus comprising:

(a) a terrestrial transmitter located at a terrestrial broadcasting location for transmitting converted local channel signals in a first frequency band, the first frequency band contained within a satellite broadcast frequency band;

(b) an antenna located at a user location remote from the terrestrial broadcasting location for receiving from the terrestrial transmitter the converted local channel signals in the first frequency band when the antenna is oriented in a first position and for receiving from the satellite direct broadcast satellite television channel signals in the satellite broadcast frequency band when oriented in a second position;

(c) antenna orienting means connected to the antenna for enabling the antenna to move between the first position and the second position; and

(d) signal processing means at the user location for receiving television signals from the antenna and processing the television signals to produce a desired channel output signal.