Developing a Dual Polarization Antenna (DPA) for High Dynamic Applications

Sherman Lo, Yu Hsuan Chen, Fabian Rothmaier, Godwin Zhang, Chiawei Lee

Abstract: GNSS spoofing is a growing concern due to the increasing use of GNSS in safety and economically important applications. The foremost task to manage GNSS spoofing is detection. Indeed, many potential means and measurements have been proposed for spoof detection but there are no panaceas. One measurement that is both useful for detection and independent of other metrics is direction of arrival (DOA). One way to get DOA is using a dual polarization antenna (DPA). While we can get DOA from more specialized antennas such as directional and array antennas, the DPA can offers this capability with a single patch antenna. Stanford has developed a prototype DPA using only commercial off the shelf (COTS) parts that has demonstrated the ability to determine direction. However, for the developed prototype to be practical, especially for high dynamic applications such as flight, the DOA determination needs to be faster and preferably more accurate. This paper examines our development to improve DOA determination time. Two approaches are used. First, a software defined radio (SDR) is developed to improve the DPA DOA determination time, reducing the minute long determination to near instantaneous. The paper examines the development and testing of SDR processing of DPA measurements for DOA determination. However, the cost of this approach is specialized dedicated hardware and additional processing which will be detailed in the paper. Hence the paper also examines improvements to our COTS design hardware to speed up DOA determination. DOA determination at about 0.5 Hz was demonstrated using an improved COTS design.
Published in: Proceedings of the 2020 International Technical Meeting of The Institute of Navigation
January 21 - 24, 2020
Hyatt Regency Mission Bay
San Diego, California
Pages: 1001 - 1020
Cite this article: Lo, Sherman, Chen, Yu Hsuan, Rothmaier, Fabian, Zhang, Godwin, Lee, Chiawei, "Developing a Dual Polarization Antenna (DPA) for High Dynamic Applications," Proceedings of the 2020 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2020, pp. 1001-1020.
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