SBIR Phase I: Multi-Frequency Patch Antennas on Biased Ferrite Substrates for High-Accuracy GPS [7223-680]

这个小型企业创新研究第一阶段项目将专注于为高精度全球定位系统(GPS)设计一种新的天线，用于大地测量、地球物理、气象学和地震研究的瞬变运动。提出了一种新的GPS用户天线设计方案，通过在偏置铁氧体衬底上使用微带贴片天线来减小多径误差并允许多频工作。偏置铁氧体的理想特性将使贴片更小、天线方向图更好、频率可调谐。因此，该天线将比现有的高精度GPS大地天线更小、更便宜、更轻，而且由于其电气性能的改善而提高了GPS测量的质量。由于GPS在需要高精度定位的科学研究中的应用越来越多，市场上推出一种新的多频低多径、更小、更轻的GPS用户天线，将为美国GPS大地测量设备的市场注入新的动力。此外，拟议中的天线将使依赖于毫米级动态GPS定位的新科学应用成为可能。铁氧体基片GPS天线将在国内外高精度GPS测量活动中得到广泛应用。

This Small Business Innovation Research Phase I project will focus on the design of a new antenna for high accuracy Global Positioning system (GPS) to be used for geodesy, geophysics, meteorology, and transient motion for earthquake studies. A new design is proposed for GPS user antennas that reduces multi-path error and allows multi-frequency operation by using a micro-strip patch antenna on biased ferrite substrates. The desirable properties of biased ferrite will enable a smaller patch, improved antenna pattern, and frequency tunability. Therefore the proposed antenna will be smaller, cheaper, and lighter than existing high-accuracy GPS geodetic antennas, besides enhancing the quality of the GPS measurements thanks to its improved electrical performances.Due to the increasing number of applications of GPS in scientific research studies that require high accuracy positioning, introducing in the market a new multi-frequency low-multi-path smaller and lighter GPS user antenna would give new impulse to the US market of GPS for geodetic equipment. Moreover, the proposed antenna will enable new science applications that depend on dynamic GPS positioning at the millimeter-level. Ferrite Substrate GPS antennas would be widely used in national and international high accuracy GPS measurement campaigns.