Resources Contact Us Home
Leaky wave antenna with radiating structure including fractal loops

Image Number 10 for United States Patent #7250916.

An antenna is provided for acquiring RF signals from various satellite ranging systems including GPS, GLONASS, GALILEO and OmniSTAR.RTM.. The antenna configuration includes a radiating structure of multi-arm spiral slots terminated with fractal loops. A leaky wave microstrip spiral feed network is used to excite the radiating structure of the antenna. The fixed beam phased array of aperture coupled slots is optimized to receive a right hand polarized signal. The proposed antenna is made out of a single PCB board. The antenna has a very uniform phase and amplitude pattern in the azimuth plane from 1.15 to 1.65 GHz, therefore providing consistent performance at GPS, GLONASS, GALILEO and OmniSTAR.RTM. frequencies. The antenna also has a common phase center at the various frequencies from 1175 MHz to 1610 MHz and substantially the same radiation pattern and axial ratio characteristics.

  Recently Added Patents
Method and apparatus for executing load distributed printing
Combination immunotherapy for the treatment of cancer
Method, base station and system for adjusting cell wireless configuration parameter
Solution based precursors
Using location based services for determining a calling window
Wireless control system for a patient support apparatus
Configurable memory controller/memory module communication system
  Randomly Featured Patents
Alloys having excellent erosion resistance and stress corrosion cracking resistance
Vapor pressure sensor and flow measuring devices
Transportable turf grasses and grass sports surfaces having porous foundations
Method for electroplating high-impact plastics
Portable coagulation monitoring device and method of assessing coagulation response
Bottle shipping top cap insert
Process of preparing carbon nanotube having improved conductivity
Apparatus for supercritical processing of a workpiece
Optical connection component which has a shutter member and which can be reduced in size