Monopulse antenna system providing independent control in a plurality of modes of operation

• US 3,392,395 A
• Filed: 04/26/1966
• Issued: 07/09/1968
• Est. Priority Date: 05/22/1961
• Status: Expired due to Term

• Current Assignee: Peter W. Hannan
• Original Assignee: Peter W. Hannan
• Inventors: Hannan, Peter W.
• Application Number:
  US04/545,324
• Time in Patent Office: 805 Days
• US Class Current: 343/755
• CPC Class Codes: G01S 13/4409 HF sub-systems particularly adapted therefor, e.g. circuits for signal combination multi-lobing aerials or aerial systems H01Q25/00
• CPC Class Codes: H01Q 19/08 for modifying the radiation pattern of a radiating horn in which it is located corrugated horns H01Q13/0208; producing a circular polarisation H01Q13/0241
• CPC Class Codes: H01Q 25/04 Multimode antennas corrugated horns H01Q13/0208

Claims

1. AN ANTENNA SYSTEM PROVIDING INDEPENDENT CONTROL IN A PLURALITY OF MODES OF OPERATION, COMPRISING:

AN ARRAY OF MULTIMODE HORNS STACKED IN THE DIRECTION OF THE ELECTRIC FIELD EACH HORN HAVING AT LEAST THREE NATURAL HORN MODES INCLUDING AN EVEN HORN MODE AND AND ODD HORN MODE;

FIRST INDEPENDENT CONTROL MEANS COUPLED TO EACH MULTIMODE HORN FOR PROVIDING PRELIMINARY SIGNALS FROM EACH HORN REPRESENTING SELECTIVE SUMMATIONS OF SAID NATURAL MODES, THE NATURAL MODES BEING SEPARATED ACCORDING TO THEIR EVEN OR ODD NATURE;

COMPARISON MEANS COUPLED TO SAID FIRST INDEPENDENT CONTROL MEANS FOR PROVIDING A PLURALITY OF INTERMEDIATE SIGNALS REPRESENTING SUM AND DIFFERENCE COMPARISONS OF THE PRELIMINARY SIGNALS OBTAINED FROM DIFFERENT HORNS;

AND SECOND INDEPENDENT CONTROL MEANS COUPLED TO SAID COMPARISON MEANS FOR PRODUCING FINAL MODE SIGNALS AT LEAST ONE REPRESENTING SELECTIVE SUMMATION OF SAID INTERMEDIATE SIGNALS.