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

这项小型企业创新研究第一阶段项目将重点设计一种用于高精度全球定位系统（GPS）的新型天线，用于大地测量学、地球物理、气象学和地震瞬态运动研究。提出了一种新的GPS用户天线设计方案，通过在偏置铁氧体基板上使用微带贴片天线来减少多径误差并实现多频率工作。偏置铁氧体的理想特性将实现更小的贴片、改进的天线方向图和频率可调性。因此，拟议的天线将比现有的高精度GPS大地测量天线更小、更便宜、更轻，此外，由于其改进的电气性能，还可以提高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，在市场上推出一种新的多频、低多径、更小、更轻的GPS用户天线，将给美国的GPS大地测量设备市场带来新的推动力。此外，拟议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。铁氧体基板GPS天线将在国内外高精度GPS测量中得到广泛应用。

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.