3750180

Information

• Patent Grant
• 3750180

• References
• Source

• Patent Number

  3,750,180

• Date Filed

  Not available

• Date Issued

  Tuesday, July 31, 1973
  52 years ago

• CPC

  • H03F7/02 - using variable-inductance element using variable-permeability element
  • H01F21/08 - by varying the permeability of the core
  • H01F29/146 - Constructional details
  • H01Q3/26 - varying the relative phase or relative amplitude of energisation between two or more active radiating elements varying the distribution of energy across a radiating aperture
  • H01Q7/06 - with core of ferromagnetic material

• US Classifications

  • 343 - Communications: radio wave antennas
  • 342 - Communications: directive radio wave systems and devices