Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Information processing apparatus and display control method
Mobile electronic device
Targeted gene deletions for polysaccharide slime formers
Light modulators and optical apparatuses including the same
Organic electroluminescence element
Pre-fetching map data using variable map tile radius
Signal processor and signal processing method
  Randomly Featured Patents
Trolley
Expansion base for a notebook personal computer
Process for coating electrically conductive substrates, an aqueous coating composition, process for the preparation of an adduct containing urethane groups and an adduct containing urethane gr
Universal methods and device for hand-held promotional opportunities
Method for creating an avoidance zone
Multipurpose waterproof lighting device with electronic glow stick
Gas- and liquid-proof safety suit
Injection molding with annular gate and sleeve shutoff valve
Fireplace unit
Pay-per-click system and method that determine whether a requested link to a merchant website is legitimate or fraudulent