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
Cake knife handle
Vehicle wheel rim protector
(4938
Switching element for a valve train of an internal combustion engine
Automatic engine oil life determination with a factor for oil quality
Systems and methods for generating a user profile based customized media guide with user-generated content and non-user-generated content
Notebook computer
  Randomly Featured Patents
Method and apparatus for constructing microlens ends for optical fibers
Wristband or other type of band having an adjustable antenna for use with a sensor reader
High-strength nylon battery separator material and related method of manufacture
Solid-state element and solid-state element device
Thread end holder for sewing machine
Method of compounding resin and fiber
DC power source unit with battery charging function
Configurator using markup language
Handle
Method and apparatus for tracking the navigation path of a user on the world wide web