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
Method for making an abrasion-resistant steel plate and plate obtained
Inhibitor of casein kinase 1delta and casein kinase 1E
Power conversion device for electric vehicle
System and method of supplying an electrical system with direct current
Combined high and low frequency stimulation therapy
Oxidative coupling of hydrocarbons as heat source
Pharmaceutical and diagnostic compositions for use in the treatment and diagnosis of neurodegenerative diseases or amyloid diseases
  Randomly Featured Patents
Process for detecting toxic substances
Power supply capable of receiving digital communications from electronic devices
Stable DNA constructs for expression of .alpha.-1 antitrypsin
Optical filling or weft bobbin feeler
Container for particulate material
Novel urethane-acrylate and radiation curable compositions
Continuous casting of metals
Vibrating nutrunner
Electrophotographic light-sensitive element
Gelled aqueous compositions