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 reducing power consumption used in communication system having time slots
Door-activated entry light fixture
Information processing apparatus, non-transitory computer-readable recording medium, and information processing method
Imaging apparatus, control method thereof, and program
Metal-doped oxide, method of preparing the same, and solid oxide electrolyte using the metal-doped oxide
Memory access monitoring method and device
  Randomly Featured Patents
Cytokine design
Method of suppressing tumor cell growth by administering a decorin gene or gene product
Photodetector including enhanced light receiving portion
Hybrid powertrain with efficient electric-only mode
Dual function exposure time display and control circuit for SLR camera
Chrysanthemum plant named `Yotabitha`
Telescopic sun visor extension sleeve
System and method for limiting energy in an industrial control system
Device for distributing incoming gases in an internal combustion air supply system
Inhibiting excess precursor transport between separate precursor zones in an atomic layer deposition system