GPS Quadrifilar Antenna Designs for Portable Devices

Low cost, high performance Global Positioning System (GPS) antennas are in demand for portable devices. The effects of partial dielectric loading and physical volume (height and diameter) are very important factors in antenna design. Parameter tradeoffs have a direct bearing on antenna pattern and therefore the overall usability of the system. This whitepaper covers several aspects of small Quadrifilar Helical Antennas (QHA) relative to portable GPS applications.

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