MULTI-LAYER FLAT PLATE ANTENNA WITH LOW-COST MATERIAL AND HIGH-CONDUCTIVITY ADDITIVE PROCESSING

• US 20020140608A1
• Filed: 04/02/2001
• Published: 10/03/2002
• Est. Priority Date: 04/02/2001
• Status: Active Grant

• Current Assignee: COMSAT Corporation (Reorganized ISA SA)
• Original Assignee: COMSAT Corporation (Reorganized ISA SA)
• Inventors: Zaghloul, Amir Ibrahim, Kohls, Eric Christopher
• Granted Patent: US 6,462,711 B1
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 21/0087 Apparatus or processes specially adapted for manufacturing antenna arrays manufacturing waveguides H01P11/00
• CPC Class Codes: H05K 1/024 Dielectric details, e.g. changing the dielectric material around a transmission line
• CPC Class Codes: H05K 1/095 for polymer thick films, i.e. having a permanent organic polymeric binder
• CPC Class Codes: H05K 1/16 incorporating printed electric components, e.g. printed resistor, capacitor, inductor
• CPC Class Codes: Y10T 29/49016 Antenna or wave energy "plumbing" making

Abstract

The invention is a multi-layer printed circuit antenna and a method for developing the antenna for which a screen printing technology is used to deposit conducting material forming the circuit layout directly on low-cost dielectric material, followed by a post-processing step performed on the printed circuit to increase circuit conductivity. In one embodiment, the dielectric material used is a thin layer supported by low-loss, foam-like material for spacing between the antenna layers. In another embodiment, a thick high-density, low-cost low-loss dielectric material acts as both the printing surface and the spacer between the antenna layers. The thick high-density, low-cost low-loss dielectric material allows for saving one layer in every printed circuit. The screen printing or additive process is less expensive than its etching or subtractive counterpart due to the process itself and due to the lower cost of materials. The post-processing of the printed circuit achieves the same level of conductivity as the more expensive etching technique. This allows for low-cost manufacturing for printed circuit antennas for use in, for example, DBS, DTH/TV, MMDS, LMDS and other wireless communications systems.

Claims

1. A method for producing a multi-layer flat plate antenna comprising the steps of:

(a) forming a ground plane;

(b) layering a first foam layer on an upper surface of said ground plane;

(c) screen-printing a power distribution circuit on a first layer of a dielectric material, said first layer of said dielectric material placed on an upper surface of said first foam layer;

(d) performing post-processing on said power distribution circuit to increase circuit conductivity;

(e) layering a second foam layer on said power distribution circuit;

(f) forming radiating elements on a second layer of said dielectric material, said second layer of said dielectric material placed on an upper surface of said second foam layer;

(g) arranging said antenna such that said power distribution circuit drives said radiating elements.

2. The method for producing a multi-layer flat plate antenna according to claim 1, wherein each layer of a plurality of layers of said power distribution circuit are alternatively layered with each layer of a plurality of layers of said radiating elements, said each layer of said plurality of layers of said power distribution circuit and said each layer of said plurality of layers of said radiating elements having one layer of a spacing material in between.

3. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said radiating elements are formed by screen-printing, and said post-processing is also performed on said radiating elements.

4. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said radiating elements are punched or formed on a planar metal plate.

5. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said dielectric material is a thin layer material.

6. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said spacing material is low-loss, foam-like material.

7. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said post-processing comprises compression of said power distribution circuit.

8. The method for producing a multi-layer flat plate antenna according to claim 1, wherein said post-processing comprises depositing a highly conductive material on said power distribution circuit.

9. The method for producing a multi-layer flat plate antenna according to claim 3, wherein said post-processing comprises compression of said radiating elements.

10. The method for producing a multi-layer flat plate antenna according to claim 3, wherein said post-processing step comprises depositing a highly conductive material on said radiating elements.

11. The method for producing a multi-layer flat plate antenna according to claim 1, wherein a highly conductive material is deposited on said ground plane.

13. The method for producing a multi-layer flat plate antenna according to claim 12, wherein each layer of a plurality of layers of said power distribution circuit are alternatively layered with each layer of a plurality of layers of said radiating elements, said each layer of said plurality of layers of said power distribution circuit and said each layer of said plurality of layers of said radiating elements separated by said dielectric material.

14. The method for producing a multi-layer flat plate antenna according to claim 12, wherein said radiating elements are formed by screen-printing and said post-processing is also performed on said radiating elements.

15. The method for producing a multi-layer flat plate antenna according to claim 12, wherein said radiating elements are punched or formed on a planar metal plate.

16. The method for producing a multi-layer flat plate antenna according to claim 12, wherein said dielectric material is a thick, high-density, low-loss material, said thick, high-density, low-loss material acting as a forming surface for said power distribution circuit and said radiating elements, and acting as a spacer between said power distribution circuit and said ground plane, and between said power distribution circuit and said radiating elements.

17. The method for producing a multi-layer flat plate antenna according to claim 12, wherein said post-processing step comprises compression of said power distribution circuit.

18. The method for producing a multi-layer flat plate antenna according to claim 12, wherein said post-processing step comprises depositing a highly conductive material on said power distribution circuit.

19. The method for producing a multi-layer flat plate antenna according to claim 14, wherein said post-processing comprises compression of said radiating elements.

20. The method for producing a multi-layer flat plate antenna according to claim 14, wherein said post-processing step comprises depositing a highly conductive material on said radiating elements.

21. The method for producing a multi-layer flat plate antenna according to claim 12, wherein a highly conductive material is deposited on said ground plane.

12. A method for producing a multi-layer flat plate antenna comprising the steps of:

(a) forming a ground plane;

(b) screen-printing a power distribution circuit on a top surface of a first layer of a dielectric material, and placing a bottom surface of said first layer of said dielectric material on an upper surface of said ground plane;

(c) performing post-processing on said power distribution circuit to increase circuit conductivity;

(d) forming radiating elements on a top surface of a second layer of said dielectric material, and placing a bottom surface of said second layer of said dielectric material on said power distribution circuit;

(e) arranging said antenna such that said power distribution circuit drives said radiating elements.

22. A multi-layer flat plate antenna comprising:

(a) a ground plane;

(b) a first layer of spacing material between said ground plane and a first layer of dielectric material;

(c) a power distribution circuit, wherein said power distribution circuit has been screen-printed on said first layer of dielectric material, and post-processed to increase circuit conductivity after said screen-printing;

(d) a second layer of spacing material between said power distribution circuit and a second layer of dielectric material; and

(e) radiating elements formed on said second layer of dielectric material, wherein said power distribution circuit drives said radiating elements.

23. The multi-layer flat plate antenna according to claim 22, wherein each layer of a plurality of layers of said power distribution circuit are alternatively layered with each layer of a plurality of layers of said radiating elements, said each layer of said plurality of layers of said power distribution circuit and said each layer of said plurality of layers of said radiating elements having one layer of said spacing material in between.

24. The multi-layer flat plate antenna according to claim 22, wherein said radiating elements are formed by screen-printing, and post-processed after said screen-printing.

25. The multi-layer flat plate antenna according to claim 22, wherein said radiating elements are punched or formed on a planar metal plate.

26. The multi-layer flat plate antenna according to claim 22, wherein said dielectric material is a thin layer material.

27. The multi-layer flat plate antenna according to claim 22, wherein said spacing material is low-loss, foam-like material.

28. The multi-layer flat plate antenna according to claim 22, wherein said post-processed power distribution circuit comprises a compressed power distribution circuit.

29. The multi-layer flat plate antenna according to claim 22, wherein said post-processed power distribution circuit comprises a highly conductive material deposited on said power distribution circuit.

30. The multi-layer flat plate antenna according to claim 24, wherein said post-processed radiating elements comprise compressed radiating elements.

31. The multi-layer flat plate antenna according to claim 24, wherein said post-processed radiating elements comprises a highly conductive material deposited on said radiating elements.

32. The multi-layer flat plate antenna according to claim 22, further comprising a highly conductive material deposited on said ground plane.

33. A multi-layer flat plate antenna comprising:

(a) a ground plane;

(b) a power distribution circuit, wherein said power distribution circuit has been screen-printed on a top surface of a first layer of dielectric material, and post-processed to increase circuit conductivity after said screen-printing, and a bottom surface of said first layer of dielectric material rests on an upper surface of said ground plane;

(c) radiating elements formed on a top surface of a second layer of said dielectric material, wherein a bottom surface of said second layer of said dielectric material rests on said power distribution circuit, and said power distribution circuit drives said radiating elements.

34. The multi-layer flat plate antenna according to claim 33, wherein each layer of a plurality of layers of said power distribution circuit are alternatively layered with each layer of a plurality of layers of said radiating elements, said each layer of said plurality of layers of said power distribution circuit and said each layer of said plurality of layers of said radiating elements separated by said dielectric material.

35. The multi-layer flat plate antenna according to claim 33, wherein said radiating elements are formed by screen-printing, and post-processed after said screen-printing.

36. The multi-layer flat plate antenna according to claim 33, wherein said radiating elements are punched or formed on a planar metal plate.

37. The multi-layer flat plate antenna according to claim 33, wherein said dielectric material is a thick, high-density, low-loss material, said thick, high-density, low-loss material acting as a forming surface for said power distribution circuit and said radiating elements, and acting as a spacer between said power distribution circuit and said ground plane, and between said power distribution circuit and said radiating elements.

38. The multi-layer flat plate antenna according to claim 33, wherein said post-processed power distribution circuit comprise a compressed power distribution circuit.

39. The multi-layer flat plate antenna according to claim 33, wherein said post-processed power distribution circuit comprises a highly conductive material deposited on said power distribution circuit.

40. The multi-layer flat plate antenna according to claim 35, wherein said post-processed radiating elements comprise compressed radiating elements.

41. The multi-layer flat plate antenna according to claim 35, wherein said post-processed radiating elements comprise a highly conductive material deposited on said radiating elements.

42. The multi-layer flat plate antenna according to claim 33, further comprising a highly conductive material deposited on said ground plane.

43. A multi-layer flat plate antenna comprising:

(a) a ground plane;

(b) a first layer of spacing material between said ground plane and a first layer of dielectric material;

(c) a power distribution circuit, wherein said power distribution circuit has been screen-printed on said first layer of dielectric material;

(d) a second layer of spacing material between said power distribution circuit and a second layer of dielectric material; and

(e) radiating elements formed on said second layer of dielectric material, wherein said power distribution circuit drives said radiating elements, and wherein at least one of said power distribution circuit or said radiating elements is post-processed to increase circuit conductivity.

44. A multi-layer flat plate antenna comprising:

(a) a ground plane;

(b) a power distribution circuit, wherein said power distribution circuit has been screen-printed on a top surface of a first layer of dielectric material, and a bottom surface of said first layer of dielectric material rests on an upper surface of said ground plane;

(c) radiating elements formed on a top surface of a second layer of said dielectric material, wherein a bottom surface of said second layer of said dielectric material rests on said power distribution circuit, and said power distribution circuit drives said radiating elements, and wherein at least one of said power distribution circuit or said radiating elements is post-processed to increase circuit conductivity.