Abstract
The high precision (centimetre accuracy) positioning systems are set to play a key role in revolutionising smart farming, self-driving cars, drone deliveries, heavy machine navigation, etc. With so much at stake the technology also needs protection from an intentional sabotage or denial of service. It is very easy with current satellite-based navigation jammers to disrupt a navigation service. Our proposed technology solves this challenge in a compact and cost-effective way. Compared to normal navigation patch antennas our proposed dual ring antenna offers over 30 dB of protection. Thus, if a patch antenna-based navigation system is disturbed at 1 watt of interference power, it will take 1000 watts to disrupt navigation system working on our proposed system. With the size of only 130 mm $\times130$ mm and cheap large-scale manufacturing, our proposed antenna is perfectly suitable for applications for safety and prosperity of the smart nation-based living.
Highlights
High precision positioning can be achieved by combining multiple GNSS (Global Navigation Satellite Systems) for UAVs (Unmanned Arial Vehicles), automated and connected agriculture, interconnected cars and robotic guidance
The jamming cancellation systems which currently are on market [1] consist of at least three or more antennas working in tandem, are of a very large in size (300 mm × 300 mm) and are expensive
For the first time this paper presents the integration with the GNSS receiver and an autonomous null steering mechanism
Summary
High precision positioning can be achieved by combining multiple GNSS (Global Navigation Satellite Systems) for UAVs (Unmanned Arial Vehicles), automated and connected agriculture, interconnected cars and robotic guidance. In further works [8]–[10], multiple radiating modes of concentric shorted patch antennas are investigated for providing full hemispherical null steering. This eliminates the high value of the inductance in the input impedance and transforms the large value of the resistance of the input impedance to an appropriate value With this circular slot, the input impedance attains 49-j7 enabling the antenna to achieve a good impedance match to the 50 feed line at 1.575 GHz. The outer annular ring patch is fed at two points P3 and P4 located at the same distance 39.2 mm from the centre. The null steering in both the elevation and the azimuth plane can be achieved by combining TM11 mode axial beam and TM21 mode conical beam with different amplitude ratio, α, and phase shift values, β, FIGURE 6.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
