Method for upgrading a satellite antenna assembly and an associated upgradable satellite antenna assembly
A method for upgrading a dual-band antenna assembly to a tri-band antenna assembly is provided. The dual-band antenna assembly includes a main reflector, and first and second antenna feeds arranged in a coaxial relationship and directed toward the main reflector. The first and second antenna feeds are for first and second frequency bands, respectively. The method includes positioning a third antenna feed through a medial opening in a center of the main reflector, with the third antenna feed directed towards the first and second antenna feeds. The third antenna feed is for a third frequency band. A subreflector is positioned between the main reflector and the first and second antenna feeds. The subreflector includes a frequency selective surface (FSS) material that is reflective for the third frequency band and transmissive for both the first and second frequency bands.
1. A controller for a satellite communications terminal for a ship and comprising an antenna comprising three antenna feeds operable at respective different frequencies, communications circuitry coupled to the three antenna feeds and being configurable for a selected antenna feed, and a positioner to mount the antenna to the ship and point the antenna, the controller comprising:
a processor and a memory cooperating therewith to select an antenna feed, configure the communications circuitry, and operate the positioner to point the antenna to a selected satellite all based upon the location of the ship and at least one selection rule, the at least one selection rule comprising at least one of a communications circuitry configuration rule and a service level agreement rule.
2. The controller according to claim 1 wherein the at least one selection rule is based upon at least one of communication speed, communication latency, and communication cost.
3. The controller according to claim 1 wherein the processor stores in the memory antenna pointing data for different satellite footprints and different ship locations, and operates the positioner according to the antenna pointing data.
4. The controller according to claim 1 wherein the processor selects the antenna feed, configures the communications circuitry, and operates the positioner also based upon at least one of a communications circuitry status and a time-of-day.
5. The controller according to claim 1 wherein the processor comprises a remote override interface to permit a remote station to override at least one of selection of the antenna feed, configuration of the communications circuitry, and pointing of the antenna.
6. A controller for a satellite communications terminal for a ship and comprising an antenna comprising three antenna feeds operable at respective different frequencies, communications circuitry coupled to the three antenna feeds and being configurable for a selected antenna feed, and a positioner to mount the antenna to the ship and point the antenna, the controller comprising:
a processor and a memory cooperating therewith to select an antenna feed, configure the communications circuitry, and operate the positioner to point the antenna to a selected satellite all based upon the location of the ship and at least one selection rule, the memory storing antenna pointing data for different satellite footprints and different ship locations, and the processor operating the positioner according to the antenna pointing data.
7. The controller according to claim 6 wherein the at least one selection rule is based upon at least one of communication speed, communication latency, and communication cost.
8. The controller according to claim 6 wherein the processor selects the antenna feed, configures the communications circuitry, and operates the positioner also based upon at least one of a communications circuitry status and a time-of-day.
9. The controller according to claim 6 wherein the processor comprises a remote override interface to permit a remote station to override at least one of selection of the antenna feed, configuration of the communications circuitry, and pointing of the antenna.