Resources Contact Us Home
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
Avalanche photodiodes having accurate and reproductible amplification layer
Water purification using energy from a steam-hydrocarbon reforming process
LO generation with deskewed input oscillator signal
Electronic dispersion compensation within optical communications using reconstruction
System for setting programmable parameters for an implantable hypertension treatment device
Wine bottle
Improving alignment target contrast in a lithographic double patterning process
  Randomly Featured Patents
Isobarically labeled analytes and fragment ions derived therefrom
Covalent dimer of kit ligand
Body support
Voltage detection circuit and method for semiconductor memory devices
Method of overcoming substance abuse
Support assembly for a pagewidth printhead module
Variable pressure regulated flow controllers
System and method for determining the well load of a hopper suction dredge
Glass for use in substrate for information recording medium, substrate for information recording medium and information recording medium, and their manufacturing method