Resources Contact Us Home
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
Embedded package and method for manufacturing the same
Automatic misalignment balancing scheme for multi-patterning technology
Configuration method and system of complex network and configuration and management module of server resources
Navigation device, navigation method, and navigation program
Vehicle headlight
Electromagnetic sensor cable and electrical configuration therefor
Lightning-protective explosion-preventive fastener
  Randomly Featured Patents
Foundation screw with portions of variable diameter
Vibration-damping rubber in suspension of vehicle
Operating status of a shutter for electromagnetic energy curing systems
Solar collectors and process for the manufacture thereof
Multiple stage valve
Image forming apparatus having function of automatically selecting one of sheet feeders, method of controlling the image forming apparatus and storage medium
High strength-high modulus rubber composition comprising a mixture of rubbery copolymers of an acenaphthalene copolymer and another rubber
Clipping device with a negative resistance
Fan assembly and fan frame thereof
Preparations for sustained release of nutraceuticals and methods of controllably releasing nutraceuticals