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 and system for electronic distribution of product redemption coupons
Image display device and capsule endoscope system
Software self-checking systems and methods
High frequency vertical spring probe
Video recording and playing apparatus and its control method
Packaging for socks
Operation controlling apparatus
  Randomly Featured Patents
Controlled dispersion flow analysis system
Enzymatic diagnostic composition
Pneumatic tire tread and buttress
Mouthguard
Wide-band transistor amplifier
Method of and means for grinding pairs of gear wheels as spiral or curved toothed bevel gear wheels
Game system with enhanced low power mode-related processing
Semiconductor device having an insulated gate and a fabrication process thereof
Device for stripping wire and cable
Muffler holding member