Ring Resonators Enhance GPS Antenna Zenith Gain
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Solution Overview
Problem
Mobile devices face challenges in achieving precise GPS positioning due to limited space, which prevents GPS antennas from aligning their maximum gain direction with the zenith, resulting in imprecise location processes.
Innovation Solution
Incorporating ring resonators on a ground plane within the mobile device to enhance the radiation gain of the GPS antenna in the zenith direction, specifically configuring them to resonate with the GPS frequency band and modify the surface current distribution to align the maximum gain direction with the zenith.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the GPS antenna is installed in a mobile device with limited space, then the device can perform GPS positioning function, but the antenna cannot align its maximum gain direction with the zenith direction, resulting in imprecise positioning
Solution Approach 1:
The patent introduces ring resonators as intermediary structures between the GPS antenna and the ground plane. These ring resonators modify the surface current distribution on the ground plane, which in turn enhances the antenna's radiation gain in the zenith direction without requiring the antenna itself to be repositioned or reoriented, thus achieving precise positioning within limited device space
Solution Approach 2:
The patent modifies the electrical parameters of the ground plane by adding ring resonators that resonate at GPS frequencies. This changes the surface current distribution pattern and impedance characteristics, thereby altering the radiation pattern of the antenna to achieve maximum gain in the zenith direction while maintaining the same physical antenna structure
2Reliability
If conventional GPS antenna structures are used in mobile devices, then the antenna can be integrated, but the radiation gain in the zenith direction is insufficient, leading to poor GPS performance
Solution Approach 1:
The ring resonators are designed to resonate at GPS frequencies, creating controlled electromagnetic oscillations that enhance the surface current distribution. This resonant behavior amplifies the radiation gain in the zenith direction, improving GPS signal reception reliability without increasing the physical size of the antenna system
Solution Approach 2:
The patent creates a composite electromagnetic structure by combining the GPS antenna element with the ground plane and adding ring resonator structures. This composite configuration produces synergistic effects where the ring resonators enhance the overall radiation characteristics of the antenna system, achieving superior GPS performance compared to conventional single-structure antennas
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 solution significantly improves the GPS performance by increasing the antenna gain in the zenith direction, expanding the bandwidth, and simplifying the antenna structure while reducing manufacturing costs, making it suitable for small-size mobile communication devices.
Implementation Method 1
the antenna element resonates with the ring resonators in a GPS (Global Positioning System) frequency band
Data Source
AI summary
A mobile device includes a ground plane, an antenna element, and one or more ring resonators. The ground plane has a first region and a second region. The antenna element is disposed on the first region. The ring resonators are disposed on the second region. Each of the ring resonators includes a first loop structure and a second loop structure. The ring resonators are configured to enhance the radiation gain of the antenna element in a zenith direction.