Resources Contact Us Home
Low cost linear/circularly polarized antenna

Image Number 2 for United States Patent #4062019.

A linear/circularly polarized antenna system is provided by four conductive elements. The conductive elements are joined in pairs at their ends with the joined ends spaced by a conductive support member from a flat reflector. The lengths of the conductive elements of each dipole element are changed from being equal lengths of approximately a quarter operating frequency wavelength to one slightly longer and the other slightly less than a quarter wavelength to selectively change operation from that of a linearly polarized antenna to that of a circularly polarized antenna.

  Recently Added Patents
Adaptive period network session reservation
Prevention and treatment of oxidative stress disorders by gluthathione and phase II detoxification enzymes
Elastic polypropylene-based film compositions
Methods and systems for automated backups and recovery on multi-os platforms using controller-based snapshots
Analogue-to-digital converter
Compositions and methods using microspheres and non-ionic contrast agents
Patient interface
  Randomly Featured Patents
Simultaneous physical and protocol layer analysis
Composite intermediate bonding structures
Waterproofing agent for ink jet printing paper
Receiving device, receiving method, and program
Hydrodynamic bearing and spindle motor
Washing process for the purification of polymers containing N or amino, ammonium or spirobicyclic ammonium groups
Medical and surgical procedure pack
Belt tensioner system
Punch press with automatic tool changer
Silver halide photographic material