Miniature Anti-Jam GPS Antenna Using Metamaterial Polarizers
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Solution Overview
Problem
GPS antennas face challenges in resisting jamming signals due to the low power of received GPS signals, particularly at L1 and L2 frequencies, which are not effectively addressed by existing technologies.
Innovation Solution
A dual-band GPS antenna design incorporating circular conductive patches and meta-material polarizers, with specific orientations and configurations of planar conductive loops, is developed to enhance signal reception and resistance to jamming, utilizing meta-materials with negative magnetic permeability to improve electromagnetic behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional GPS antenna designs are used, then the antenna can receive GPS signals, but the antenna is vulnerable to jamming signals due to the low power of received GPS signals
Solution Approach 1:
The antenna is divided into multiple receiving elements (N elements) arranged in an array configuration. Each element independently receives GPS signals and contributes to the overall signal reception capability. This segmentation allows the antenna to resist jamming signals from N-1 locations through spatial diversity and signal processing techniques.
Solution Approach 2:
The patent employs composite structures combining conductive patches, ground planes, and dielectric materials to create receiving elements with optimized electromagnetic characteristics. The composite design enhances signal reception efficiency and jamming resistance by manipulating electromagnetic field distribution and impedance matching.
2Reliability
If the number of receiving elements is increased to resist jamming from more locations, then the resistance to jamming improves, but the antenna size increases
Solution Approach 1:
The antenna design integrates multiple receiving elements within a compact planar structure, where elements are arranged in a space-efficient configuration. The nested arrangement allows N elements to be accommodated in a smaller footprint compared to conventional linear arrays, reducing the overall antenna area while maintaining jamming resistance capability.
Solution Approach 2:
The patent transitions from traditional linear or planar array configurations to a three-dimensional spatial arrangement of receiving elements. By utilizing vertical stacking or angled positioning of elements relative to the ground plane, the antenna achieves enhanced jamming resistance without proportionally increasing the horizontal footprint, thus reducing the overall antenna area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The antenna effectively receives right-hand circularly polarized GPS signals at both L1 and L2 frequencies, providing improved resistance to jamming signals and potentially reducing antenna size while maintaining performance.
Implementation Method 1
utilizing meta-materials with negative magnetic permeability to improve electromagnetic behavior
Implementation Method 2
a patch and a meta-material configured to be electromagnetically coupled to the patch
Data Source
AI summary
Antennae are described. The antennae may be GPS antennae configured to receive GPS signals at both the L1 and L2 frequencies. The antennae may include patches and polarizers which allow the antennae to receive right-hand circularly polarized GPS signals from GPS satellites. In some situations, the polarizers may include a meta-material. The meta-material may in some situations include circuit components formed on a suitable substrate.