Multi-band antenna formed of closely spaced folded dipoles of increasing length

• US 3,167,775 A
• Filed: 09/29/1960
• Issued: 01/26/1965
• Est. Priority Date: 10/07/1959
• Status: Expired due to Term

• Current Assignee: Guertler Rudolf
• Original Assignee: Guertler Rudolf
• Inventors: GUERTLER RUDOLF
• Application Number:
  US04/059,333
• Time in Patent Office: 1,580 Days
• US Class Current: 343/806
• CPC Class Codes: H01Q 11/10 Logperiodic antennas H01Q11/08 takes precedence
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 5/49 with parasitic elements used for purposes other than for dual-band or multi-band, e.g. imbricated Yagi antennas
• CPC Class Codes: H01Q 9/26 with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength resonant loop antennas H01Q7/00

Claims

1. AN ANTENNA CONSISTING OF A PLURALITY OF PAIRS OF DIPOLES HAVING PARALLEL AXES DISPOSED IN A COMMON PLANE WITH THE CENTERS OF SAID DIPOLES DEFINING A STRAIGHT LINE, THE SPACING BETWEEN ADJACENT POLES BEING LESS THAN ONETENTH OF A WAVELENGTH AT THE HIGHEST FREQUENCY OF OPERATION, THE LENGTH OF THE DIPOLES INCREASING FROM PAIR TO PAIR, ALL DIPOLE ELEMENTS ON ONE SIDE OF SAID STRAIGHT LINE BEING CONNECTED SERIALLY, THE TERMINALS OF THE LAST LONGEST DIPOLE BEING SHORT-CIRCUITED, AND ALL DIPOLE ELEMENTS ON THE OTHER SIDE OF SAID STRAIGHT LINE BEING CONNECTED SERIALLY, SO THAT A CONTINUOUS MEANDERING CONDUCTING PATH IS PROVIDED STARTING FROM ONE TERMINAL OF THE FIRST SHORTEST DIPOLE AND CONTINUING SERIALLY THROUGH ALL DIPOLE ELEMENTS ON ONE SIDE OF SAID STRAIGHT LINE, THENCE THROUGH ALL DIPOLE ELEMENTS ON THE OTHER SIDE OF SAID STRAIGHT LINE AND FINISHING AT THE OTHER TERMINAL OF THE FIRST SHORTEST DIPOLE, THUS ENABLING EACH ELEMENT TO ACT AS A RADIATING ELEMENT IN COOPERATION WITH THE ELEMENT OPPOSITE WITH REFERENCE TO SAID STRAIGHT LINE AND TO TAKE PART IN TRANSMISSION LINE STUB OPERATION WITH AN ADJACENT ELEMENT, THE ENTIRE ANTENNA SO FORMED EXHIBITING HIGHEST SENSITIVITY ALONG SAID STRAIGHT LINE, AND BEING CAPABLE OF OPERATING OVER A WIDE RANGE OF FREQUENCIES.