DUAL MODE WAVE ENERGY TRANSDUCER DEVICE

• US 3,701,158 A
• Filed: 01/22/1970
• Issued: 10/24/1972
• Est. Priority Date: 01/22/1970
• Status: Expired due to Term

• Current Assignee: Robert Henry Johnson
• Original Assignee: Robert Henry Johnson
• Inventors: Johnson, Robert Henry
• Primary Examiner(s): Lieberman, Eli
• Application Number:
  US05/004,975
• Time in Patent Office: 1,006 Days
• Field of Search: 343/720,753,754,755,840,909,770,725,770,853
• US Class Current: 343/725
• CPC Class Codes: G01S 13/86 Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 25/02 providing sum and difference patterns H01Q25/04 takes precedence

Abstract

A compact, efficient and inexpensive unitary structure comprising a circular conductive sheet having dipole slots therein and a transducer device operative at a wavelength different than that of the dipole slots centered on the sheet and fixed thereto and extending perpendicular to the sheet is disclosed for sensing both radio waves reflected from a target and infrared or other rays emanating from the target.

Claims

1. A combined radio frequency antenna array and an antenna for a substantially higher frequency band comprising a first substantially flat circuit board of a predetermined area and having a film layer of conducting material on one face thereof and a first layer of dielectric material immediately therebehind, said conducting film layer facing in the direction of energy transmission and reception, a plurality of slots of substantially the same dimensions in said conducting film layer forming an antenna array for transmitting and receiving radio waves of a certain wave length, said slots being positioned in different sectors of said board symmetrically with respect to the center lines of said board to produce several sectorial radio frequency antenna arrays, a second substantially flat circuit board comprising a second dielectric layer with sectorially arranged conducting film circuits thereon disposed with said sectorial circuits immediately against the dielectric material of said first circuit board, each one of said conducting film circuits being disposed behind a respective one of said arrays for receiving wave energy therefrom and transmitting radio frequency energy thereto, a connector in each of said sectors, the conducting film circuit in each sector having one End terminating adjacent each of the slots in said sector on the side of said first dielectric layer opposite to said slots and having the other end terminating at the connector in said sector, whereby the conducting film circuit in each sector picks up and adds together the wave energy from the slots in that sector only, and transmitting and receiving antenna means which operates with waves in a substantially higher frequency band than said radio frequency positioned at least in part in said area of said board, said higher frequency transmitting and receiving antenna having an axis which is perpendicular to the face of said board.

2. The combined antenna of claim 1 in which said area is central of said circuit board.

3. The combined antenna of claim 2 in which said higher frequency antenna means device operates with infrared waves.

4. The combined antenna of claim 3 in which said infrared ray higher frequency antenna means device has directional characteristics.

5. The combined antenna of claim 1 in which said slots are of dipole shape.

6. The combined antenna of claim 1 in which said slots are parallelly positioned with respect to each other.

7. The combined antenna according to claim 1 wherein said sectors are quadrants.

8. The combined antenna according to claim 7 wherein the conducting film circuits are printed circuit means.

9. The combined antenna of claim 7 in which a like plurality of slots are positioned in each quadrant.