3720953

Information

• Patent Grant
• 3720953

• References
• Source

• Patent Number

  3,720,953

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  51 years ago

• CPC

  • H01Q21/24 - Combinations of aerial elements or aerial units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
  • H01Q3/34 - by electrical means
  • H01Q13/10 - Resonant slot aerials
  • H01Q19/138 - Parallel-plate feeds
  • H01Q21/0031 - Parallel-plate fed arrays; Lens-fed arrays

• US Classifications

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