Resources Contact Us Home
Direct fed spiral antenna

Image Number 3 for United States Patent #3949407.

A direct fed spiral antenna element array is disclosed for radiating electromagnetic energy. Each antenna element is a multi-arm spiral element having inner and outer ends. Phase shifting is obtained with internal phase control wherein switching means serve to interconnect selected ones of the inner arm ends. Each such antenna element is directly fed by a feed network which feeds currents directly to the outer ends of the spiral arms.

  Recently Added Patents
Image scanning apparatus and image forming apparatus
Real-time pricing of shipping vendors
Data security for dynamic random access memory using body bias to clear data at power-up
Method and apparatus for linking a web browser link to a promotional offer
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Adaptive switch mode LED system
  Randomly Featured Patents
Recorded volume holograms with multiple adhesive layers
Inorganic anisotropic hollow fibers
Miniature spot cleaner
Modular ski rack
Body support foam pad with adaptive shear stress control
Photonic switch
Valve selector assembly
Method and apparatus for implementing multi-grid computation for multi-cell computer models with embedded cells
Method for eliminating, or minimizing the effects of, defects in materials
Repair composition for steelmaking furnaces and the like