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
DC/DC converter, power supply circuit, and semiconductor device
Method and apparatus for coordinating hopping of resources in wireless communication systems
Identification wristband
Frame timing synchronization in a geostationary satellite system
Formation of an optical waveguide
Audio processing in a multi-participant conference
Semiconductor device and manufacturing method thereof
  Randomly Featured Patents
Shared embedded trace macrocell
Apparatus for controlling the flow separation line of rocket nozzles
Decorative rear window protector for trucks
Prefabricated building panels
Ground support system for a grass cutting machine
Current mirror circuit
Joint construction between components of military projectile and releasable by melting of fusible eutectic helical member
Digital radio receiver
Frame including stable case and slidably movable case and backlight module using same
Releasable and interchangeable connections for golf club heads and shafts