Microwave plane antenna simultaneously receiving two polarizations

• US 4,829,314 A
• Filed: 12/09/1986
• Issued: 05/09/1989
• Est. Priority Date: 12/20/1985
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Barbier, Pascal, Falgat, Francis, Sorel, Alain
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Johnson, Doris J.
• Application Number:
  US06/939,602
• Time in Patent Office: 882 Days
• Field of Search: 343/769, 343/777, 343/778, 343/786, 343/787, 343/799, 343/756, 343/700 MS File
• US Class Current: 343/778
• CPC Class Codes: H01Q 21/0081 using suspended striplines
• CPC Class Codes: H01Q 21/064 using horn or slot aerials slotted waveguides arrays H01Q21/005
• CPC Class Codes: H01Q 25/001 Crossed polarisation dual antennas orthomode horns H01Q13/0258; cross-polarised rear feeds H01Q19/136; orthomode transducers H01P1/161

Abstract

Multi-element microwave plane antenna for receiving satellite television signals with two simultaneous polarizations. The antenna is provided with two systems of lines (1) whose ends (3, 30) form probes emerging into wave-guides (2). The probes of one system (3) are perpendicular to those of the other system (30). Between the two systems of lines there is placed only a thin sheet (150) bored with cross-shaped cut-outs (6), and provided with separating studs made from a silk-screen-printed insulating material.

Claims

1. A planar high-frequency antenna including, in order:

a. a rigid waveguide unit of material having a plurality of openings therethrough bounded by conductive surfaces defining respective waveguides;

b. a first planar member having openings therethrough aligned with the openings in the rigid block and bounded by conductive surfaces defining continuations of the respective waveguides;

c. a second planar member of dielectric material bearing a network of strip conductors having ends extending into respective ones of the waveguides in a first direction;

d. a third planar member having cross-shaped openings therethrough aligned with the openings in the first planar member and bounded by conductive surfaces defining continuations of the respective waveguides, said third planar member having a thickness which is relatively small with respect to an operating wavelength of the antenna;

e. a fourth planar member of dielectric material bearing a network of strip conductors having ends extending into respective ones of the waveguides in a second direction perpendicular to the first direction;

f. a fifth planar member having openings therethrough aligned with the openings in the third planar member and bounded by conductive surfaces defining continuations of the respective waveguides;

g. a rigid chassis for supporting the planar members;

h. a first pattern of separating studs disposed between the first and second planar members, and a corresponding second pattern of separating studs disposed between the second and third planar members; and

i. a third pattern of separating studs disposed between the third and fourth planar members, and a fourth pattern of separating studs disposed between the fourth and fifth planar members;

said patterns of studs being supported on respective ones of the planar members and being arranged to inflexibly secure the second and fourth planar members between solid portions of the rigid waveguide unit and the rigid chassis.

2. An antenna as in claim 1 where the patterns of studs are disposed on the first, third and fifth planar members.

3. An antenna as in claim 1 or 2 where the patterns of studs consist essentially of silk-screen-deposited dielectric material.

4. An antenna as in claim 1 or 2 where the third planar member comprises first and second sheets of material disposed on each other.

5. An antenna as in claim 1 or 2 where the openings in the rigid waveguide unit are square shaped.