Novel Timing Antennas for Improved GNSS Resilience
Abstract
Global Navigation Satellite System (GNSS) antennas installed at fixed site infrastructure are susceptible to interference, jamming, and spoofing signals incident along the direction of the horizon. In this paper, a set of requirements are derived for GNSS antennas that ensure critical infrastructure timing receivers have access to sufficient satellites to derive resilient time and frequency while placing a null in all polarizations at and below the horizon. Multiple quadrifilar helix antennas that meet these requirements are also presented. The efficacy of the designs is demonstrated with field test results. The salient feature of these antennas is a null in the gain pattern in the direction of the horizon and around all azimuth angles to suppress ground-based interference. Other types of antennas have been developed to minimize interference, such as controlled reception pattern antennas. However, none of these antennas simultaneously have sufficient performance, size, weight, power, and cost for widespread applications in commercial and military installations. The proposed high-performance antennas provide GNSS resilience in a small form factor at a low-cost due to the simple architecture.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2018
- Accession Number
- AD1107974
Entities
People
- Erik Lundberg
- Ian Mcmichael
Organizations
- Homeland Security Systems Engineering and Development Institute