| 摘要 |
Lensed antenna methods and systems are provided for navigation or other signals. A dielectric lens is positioned adjacent an antenna. A dielectric lens adjacent an annular ring patch antenna may broaden the acceptance angle of the antenna, providing the desired signal reception characteristics of the annular ring patch antenna, but with more acceptance of signals closer to the horizon. More desired phase center stability, improved phase response, and/or desired axial ratio may be provided by the dielectric lens. The dielectric lens may increase at least one performance characteristic of stacked or multi-frequency antennas. The lens modifies a radiation pattern for determining a range as a function of the navigation signals received through the dielectric lens. The methods and systems are used for GNSS, communications, multimedia, or other radio frequency signals on a mobile or stationary platform, such as a vehicle or hand-carried device.
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