Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Direct fed spiral antenna










Image Number 2 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
Biomedical electro-stimulator
Mobile browser context switching
Porous objects having immobilized encapsulated biomolecules
Polymeric structures comprising a siloxane
Nanoparticles in a flash memory using chaperonin proteins
Device for determining the absolute angular position of the steering wheel of an electric power-assisted steering column of a motor vehicle using weighted dynamic parameters of the vehicle
Methods and systems providing desktop search capability to software application
  Randomly Featured Patents
Optical disc copy prevention system
System and process for vacuum thermolysis treatment of liquid or gas products the disposal of which is detrimental to the environment
Device and method in electronics systems
Method for topographical patterning of materials
Prevention of decubital ulcers using implanted magnet
Reverse coupling effect with timing information
Bidirectional trellis coding
Direct drive can opener
Forced-air heater control system and method
Multi-color electrophoretic displays and materials for making the same