Integrated polarization converter and feed horn
An integral waveguide device herein includes a polarizer component comprising a waveguide and a dielectric slab, the dielectric slab configured to change a polarization of a signal passing through the waveguide. The integral waveguide device also includes a feed horn for conveying signals between the waveguide and a parabolic antenna. The waveguide of the polarizer and the feed horn are manufactured as an integral component with the feed horn disposed at a first end of the waveguide.
1. An integral waveguide device comprising:
a polarizer component comprising a waveguide and a dielectric slab, the dielectric slab configured to change a polarization of a signal passing through the waveguide; and
a feed horn for conveying signals between the waveguide and a parabolic antenna, wherein:
the waveguide of the polarizer component and the feed horn are formed manufactured as an integral component with the feed horn disposed at a first end of the waveguide,
the dielectric slab is configured to be inserted into an axial void that traverses a length of the waveguide,
the waveguide includes a plurality of first apertures in a wall of the waveguide defining a first position surrounding the axial void and a plurality of second apertures in the wall of the waveguide defining a second position surrounding the axial void, and
the dielectric slab includes a plurality of tabs configured to engage with the plurality of first apertures or the plurality of second apertures respectively when the dielectric slab is placed in the first position or the second position to hold the dielectric slab within the waveguide.
2. The integral waveguide device of claim 1 , wherein the waveguide of the polarizer component and the feed horn are machined as a single piece.
3. The integral waveguide device of claim 1 , wherein the waveguide of the polarizer component and the feed horn are extruded as a single piece.
4. The integral waveguide device of claim 1 , wherein the plurality of first apertures and the plurality of second apertures are configured to enable the waveguide to accommodate dielectric slabs having a plurality of lengths.
5. The integral waveguide device of claim 1 , wherein the waveguide includes a plurality of removable cap elements configured to engage a wall of the polarizer component to cover an opening of the plurality of first apertures and the plurality of second apertures on an exterior side of the wall of the waveguide.
6. The integral waveguide device of claim 1 wherein:
the axial void has a circular cross section,
the waveguide including a pair of slots disposed on opposite sides of an interior surface of a wall forming the axial void, and
a first edge of the dielectric slab being inserted in a first slot of the pair of slots and a second edge of the dielectric slab being inserted into a second slot of the pair of slots to hold the dielectric slab in position within the waveguide.
7. The integral waveguide device of claim 1 , wherein one or more performance characteristics of the integral waveguide device are optimizable by altering a length of the dielectric slab.
8. The integral waveguide device of claim 1 , further comprising a connector component integral with the waveguide at a second end of the waveguide opposite the first end of the waveguide, the connector component being configured to connect the waveguide to a port having a cross sectional shape that is different from a cross sectional shape of the waveguide, the connector component comprising transitional elements that gradually transition a cross section of the connector component from the cross sectional shape of the port to the cross sectional shape of the waveguide.
9. The integral waveguide device of claim 1 , wherein the integral waveguide device is installed in a very small aperture terminal (VSAT), and wherein the parabolic antenna is an element of the VSAT.
10. A method for manufacturing an integral waveguide device comprising:
forming the integral waveguide device in a single piece, the integral waveguide device comprising a waveguide of a polarizer component and a feed horn, the feed horn disposed at a first end of the waveguide; and
inserting a dielectric slab into the waveguide of the polarizer component, the dielectric slab is configured to change a polarization of a signal passing through the waveguide; wherein:
the dielectric slab is configured to be inserted into an axial void that traverses a length of the waveguide,
the waveguide includes a plurality of first apertures in a wall of the waveguide defining a first position surrounding the axial void and a plurality of second apertures in the wall of the waveguide defining a second position surrounding the axial void, and
the dielectric slab includes a plurality of tabs configured to engage with the plurality of first apertures or the plurality of second apertures respectively when the dielectric slab is placed in the first position or the second position to hold the dielectric slab within the waveguide.
11. The method of claim 10 , wherein forming the integral waveguide further comprises machining the waveguide of the polarizer component and the feed horn as a single piece.
12. The method of claim 10 , wherein forming the integral waveguide further comprises extruding the waveguide of the polarizer component and the feed horn as a single piece using a lathe.
13. The method of claim 10 , wherein inserting the dielectric slab into the waveguide of the polarizer component further comprises inserting the dielectric slab into an axial void that traverses a length of the waveguide.
14. The method of claim 13 , further comprising forming a plurality of apertures through a wall of the waveguide surrounding the axial void, wherein inserting the dielectric slab into the waveguide further comprises inserting the dielectric slab such that a plurality of tabs of the dielectric slab engage with the plurality of apertures to hold the dielectric slab in position within the waveguide.
15. The method of claim 14 , further comprising:
covering an opening of the plurality of first apertures and the plurality of second apertures on an exterior side of the wall of the waveguide with respective one of a plurality of removable cap elements configured to engage a wall of the polarizer component.
16. The method of claim 13 , wherein:
the axial void has a circular cross section, and
the waveguide including a pair of slots disposed on opposite sides of an interior surface of a wall forming the axial void, the method further comprising:
inserting a first edge of the dielectric slab into a first slot of the pair of slots; and
inserting a second edge of the dielectric slab into a second slot of the pair of slots to hold the dielectric slab in position within the waveguide.
17. The method of claim 10 , further comprising:
altering a length of the dielectric slab to optimize one or more performance characteristics of the integral waveguide device.
18. The method of claim 10 , further comprising:
forming a connector component integral with the waveguide at a second end of the waveguide opposite the first end of the waveguide, the connector component being configured to connect the waveguide to a port having a cross sectional shape that is different from a cross sectional shape of the waveguide, the connector component comprising transitional elements that gradually transition a cross section of the connector component from the cross sectional shape of the port to the cross sectional shape of the waveguide.
19. The method of claim 10 , further comprising:
installing the integral waveguide in a very small aperture terminal (VSAT).