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
Computerized information and display methods
Liquid crystal display device with a control mechanism for eliminating images
Print control server, print controlling method, and print control program
Process for filtering interferograms obtained from SAR images acquired on the same area
Anti-GITR antibodies
System and method for measuring an analyte in a sample
Methods and apparatus for deactivating internal constraint curves when inflating an N-sided patch
  Randomly Featured Patents
Display device and electronic device having the display device, and method for manufacturing thereof
Segmented mirror
Fabricated crown plate for Francis-type hydraulic turbine runner
Semiconductor integrated circuit
Adjustable traction block
Display unit and method of fabricating the same
Method and structure for ultra narrow crack stop for multilevel semiconductor device
System, method, and computer program product for securing data on a server based on a heuristic analysis
Photoelectrical encoder employing an optical grating
Portable medical equipment for clinical analysis