Vacuum electronic device

• US 8,242,696 B1
• Filed: 05/06/2010
• Issued: 08/14/2012
• Est. Priority Date: 10/31/2008
• Status: Active Grant

• Current Assignee: Innosys, Inc.
• Original Assignee: Innosys, Inc.
• Inventors: Hwu, Ruey-Jen, Sadwick, Laurence P., Ren, Jishi
• Primary Examiner(s): Souw, Bernard E
• Application Number:
  US12/775,466
• Time in Patent Office: 831 Days
• Field of Search: 330/4.6, 330/4.7, 330/43, 330/44, 330/45, 330/56, 330/145, 331/79, 331/81, 331/82, 331/187, 315/3.5, 315/3.6, 315/393, 315/363, 315/111.31, 315/111.51, 315/111.81, 219/745, 219/746, 219/748, 219/750, 219/756, 219/757
• US Class Current: 315/3.5
• CPC Class Codes: H01J 23/24 Slow-wave structures , e.g. delay systems
• CPC Class Codes: H01J 25/34 Travelling-wave tubes; Tubes in which a travelling wave is simulated at spaced gaps

Abstract

Various apparatuses and methods for a vacuum electronic device are disclosed herein. In one embodiment, a vacuum electronic device includes a vacuum housing, an array of slow wave structures inside the vacuum housing sharing a common electron beam tunnel, an electron beam input port at a first end of the common electron beam tunnel, and an electron beam output port at a second end of the common electron beam tunnel.

Claims

1. A vacuum electronic device comprising:

a vacuum housing;

an electron beam input port in the vacuum housing at a first end of a planar electron beam tunnel;

an electron beam output port in the vacuum housing at a second end of the electron beam tunnel;

at least one RF input port in the vacuum housing operable to receive an RF signal into the vacuum housing;

at least one RF output port in the vacuum housing operable to output the RF signal from the vacuum housing; and

an array of slow wave structures inside the vacuum housing adjacent the electron beam tunnel, operable to carry induced electrical currents and create electromagnetic fields to transfer energy from an electron beam in the electron beam tunnel to the RF signal passing around the slow wave structures, the slow wave structures comprising electrically conductive members in a periodic arrangement forming a path for the RF signal between the at least one RF input port and the at least one RF output port.

2. The vacuum electronic device of claim 1, wherein each of the slow wave structures comprises a plurality of parallel spaced-apart rungs on first and second opposite sides of the electron beam tunnel, wherein the rungs are substantially perpendicular to the electron beam tunnel.

3. The vacuum electronic device of claim 1, wherein the array of slow wave structures is operable during operation to form magnetic walls between adjacent slow wave structures.

4. The vacuum electronic device of claim 2, wherein each of the slow wave structures further comprises at least one support between each of the rungs and the vacuum housing, wherein the supports are operable to electrically connect the rungs and the vacuum housing and wherein the supports do not impinge on the electron beam tunnel.

5. The vacuum electronic device of claim 4, wherein the supports comprise elongate conductive members extending parallel to the electron beam tunnel.

6. The vacuum electronic device of claim 4, wherein each of the slow wave structures comprises an electrically conductive elongate ridge connected to the vacuum housing and lying perpendicular to the rungs and spaced apart from the rungs.

7. The vacuum electronic device of claim of claim 1, wherein the RF input and output ports comprise end feed ports, wherein the ports enter the vacuum housing on a plane substantially parallel to the electron beam tunnel.

8. The vacuum electronic device of claim of claim 1, wherein the RF input and output ports comprise perpendicular feed ports, wherein the ports enter the vacuum housing on a plane substantially perpendicular to the electron beam tunnel.

9. The vacuum electronic device of claim 1, further comprising a sheet beam electron gun connected to the electron beam input port and a collector connected to the electron beam output port.

10. The vacuum electronic device of claim 1, further comprising an array of electron guns connected to the electron beam input port, each of the array of electron guns corresponding to one of the array of slow wave structures.

11. The vacuum electronic device of claim 10, wherein the array of electron guns comprise an array of oval beam electron guns.

12. The vacuum electronic device of claim 1, wherein an edge cavity is formed in the vacuum housing at a first edge and a second edge of the array of slow wave structures.

14. The vacuum electronic device of claim 6, further comprising a plurality of dielectric spacers between the ridges and rungs.

13. A method of manufacturing a vacuum electronic device, the method comprising:

providing a vacuum housing;

providing an electron beam input port in the vacuum housing at a first end of a planar electron beam tunnel;

providing an electron beam output port in the vacuum housing at a second end of the electron beam tunnel;

providing at least one RF input port in the vacuum housing operable to receive an RF signal into the vacuum housing;

providing at least one RF output port in the vacuum housing operable to output the RF signal from the vacuum housing; and

enclosing the electron beam tunnel with an array of slow wave structures inside the vacuum housing, operable to carry induced electrical currents and create electromagnetic fields to transfer energy from an electron beam in the electron beam tunnel to the RF signal passing around the slow wave structures, the slow wave structures comprising electrically conductive periodic members forming a path for the RF signal between the at least one RF input port and the at least one RF output port.

15. The method of claim 13, wherein the vacuum electronic device is fabricated in two halves.

16. The method of claim 13, wherein the vacuum electronic device is fabricated in layers.

17. The method of claim 13, wherein the periodic members comprise a plurality of parallel spaced-apart rungs on first and second opposite sides of the electron beam tunnel, wherein the rungs are substantially perpendicular to the electron beam tunnel, and wherein the rungs are supported by support walls and electrically connected to the vacuum housing by a plurality of elongate support walls that are substantially parallel to the electron beam tunnel.

18. The method of claim 17, further comprising providing a ridge between each of the support walls on each of the first and second opposite sides of the electron beam tunnel and between the rungs and the vacuum housing.

19. The method of claim 18, further comprising providing dielectric spacers between the ridges and rungs.

20. A vacuum electronic spatial power combining array, comprising:

a vacuum housing;

an electron beam input port in the vacuum housing at a first end of a planar electron beam tunnel;

an electron beam output port in the vacuum housing at a second end of the electron beam tunnel;

at least one RF input port in the vacuum housing operable to receive an RF signal into the vacuum housing;

at least one RF output port in the vacuum housing operable to output the RF signal from the vacuum housing;

a first plurality of rungs and a second plurality of electrically conductive rungs on opposite sides of the electron beam tunnel, the rungs running perpendicular to the electron beam tunnel, the rungs supported within the vacuum housing by a plurality of electrically conductive support walls between the rungs and the vacuum housing, wherein the rungs and the support walls are operable to carry induced electrical currents and create electromagnetic fields to transfer energy from an electron beam in the electron beam tunnel to the RF signal passing around the rungs;

a ridge between each of the support walls and connected to the vacuum housing; and

a dielectric spacer between each of the ridges and the rungs.