Space-borne antenna system
A space-borne antenna system includes a number of panels being moveable to each other and having a gap in between them when the panels are arranged in an operation condition. The system also includes an RF distribution network for providing transmit signals to the number of panels and combining received signals from the number of panels. The system further includes a set of choke flange assemblies that allow a contactless inter-panel signal transmission across a dedicated gap. A respective choke flange assembly is arranged on the far side of a radiating surface of the dedicated adjacent panels. The system also includes an RF seal assembly for suppressing a signal coupling of signals radiated from the number of panels to the set of choke flange assemblies by sealing the gap.
1. A space-borne antenna system, comprising:
a number of panels in an operational position in which there is a gap between the number of panels;
a choke flange assembly configured to transmit inter-panel signals across the gap; and
an RF seal assembly configured to suppress a signal coupling of signals radiated from the number of panels to the choke flange assembly by sealing the gap;
wherein the RF seal assembly is arranged at a hinge line and comprises a first seal profile and a second seal profile that are affixed as an opposing pair in the gap between the number of panels;
wherein the first seal profile and the second seal profile each comprise a first portion which is attached to a respective panel.
2. The antenna system of claim 1 , wherein the RF seal assembly is dedicated to the gap between the number of panels.
3. The antenna system of claim 1 , wherein the first and the second seal profiles are L-shaped, in a side view in a longitudinal section through the antenna system.
4. The antenna system of claim 3 , wherein first portions of the first and the second seal profiles extend when the number of panels are arranged in the operation condition in a plane of the number of panels.
5. The antenna system of claim 1 , wherein second portions of the first and the second seal profiles extend in a direction of radiation of signals such that the second portions of the first and second seal profiles are opposing and have a gap in between them.
6. The antenna system of claim 5 , wherein the gap between the second portions of the first and the second seal profiles has a constant width in the direction of radiation of signals.
7. The antenna system of claim 5 , wherein the gap between the second portions of the first and the second seal profile has a widening or narrowing width in the direction of radiation of signals.
8. The antenna system of claim 1 , wherein the number of panels comprise radiation waveguides; and
the RF seal assembly and the radiating waveguides of the number of panels are made from a same material.
9. The antenna system of claim 1 , wherein the RF seal assembly is mechanically attached to the number of panels via at least one adhesive tape.
10. The antenna system of claim 1 , wherein the RF seal assembly is electrically coupled to the number of panels via a metal adhesive tape.
11. The antenna system of claim 1 , wherein the number of panels are configured to move between a first position and a second position, wherein the second position is the operational position.
12. A space-borne antenna system, comprising:
a number of panels configured to move by means of a hinge between a first position and a second position, wherein the second position is an operational position in which there is a gap between the number of panels;
a choke flange assembly configured to transmit inter-panel signals across the gap; and
an RF seal assembly configured to suppress a signal coupling of signals radiated from the number of panels to the choke flange assembly,
wherein the RF seal assembly is arranged at a hinge line of the hinge.
13. A space-borne antenna system, comprising:
a number of panels in an operational position in which there is a gap between the number of panels;
a choke flange assembly configured to transmit inter-panel signals across the gap; and
an RF seal assembly configured to suppress a signal coupling of signals radiated from the number of panels to the choke flange assembly by sealing the gap,
wherein the RF seal assembly comprises a first seal profile and a second seal profile that are affixed as an opposing pair in the gap between the number of panels,
wherein the first seal profile and the second seal profile each comprise a first portion which is attached to a respective panel, and
wherein the first and the second seal profiles are L-shaped, in a side view in a longitudinal section through the antenna system.