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
System and method to obtain signal acquisition assistance data
Base station synchronization for a single frequency network
Thermal conductivity and phase transition heat transfer mechanism including optical element to be cooled by heat transfer of the mechanism
System and method for browsing tabbed-heterogeneous windows
Automatic search system and method
Moving structure and micro-mirror device using the same
Liquid crystal display device
  Randomly Featured Patents
Fast AGC setting using RSS (I) measurement procedure
Centrifuge cartridge for removing soot from oil in vehicle engine applications
Fast phase locking system for automatically calibrated fractional-N PLL
Off-line MCPA calibration
Gas laser
Drive circuit for brushless DC motor
Process for modifying unsaturated triacylglycerol oils: resulting products and uses thereof
Sound field control apparatus, signal processing apparatus, sound field control program, and signal processing program
Cable connector assembly
Microwave generated plasma light source apparatus