Coupled GPS Antenna Structure for Multi-Mode Radiation
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Solution Overview
Problem
Existing GPS antennas in electronic devices operate in a single-mode manner, leading to poor radiation performance due to concentrated operating currents and limited excitation of transverse currents.
Innovation Solution
The proposed antenna structure includes an antenna radiation body between coupled radiation branches, with matching circuits and feeds designed to create multiple current loops, supporting multiple operating modes and enhancing radiation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wide-sized metals are used for connection between antenna radiation bodies and ground, then operating currents can quickly return to ground, but operating currents become concentrated in small area resulting in poor radiation performance
Solution Approach 1:
The ground connection is segmented into multiple paths through the coupled radiation branches. Instead of a single wide metal connection, the patent divides the current return path into multiple smaller paths through the coupled branches, which disperses the operating currents and prevents concentration in a small area, thereby improving radiation performance while maintaining efficient current return.
Solution Approach 2:
The patent transitions from a planar ground connection to a three-dimensional coupled radiation branch structure. By adding vertical and lateral dimensions through the coupled branches, the current paths are expanded in space, allowing currents to distribute more effectively and excite stronger transverse currents for improved radiation.
2Device complexity
If single-mode operation is used in GPS antennas, then the structure is simple, but radiation performance is poor due to limited transverse current excitation
Solution Approach 1:
The coupled radiation branches serve multiple functions simultaneously: they act as current return paths to ground, they create additional current loops for multi-mode operation, and they provide coupling mechanisms to excite transverse currents. This multi-functionality enables improved radiation performance without proportionally increasing structural complexity.
Solution Approach 2:
The patent merges the ground connection function with the radiation function by integrating the ground paths into the radiation branch structure. The coupled branches simultaneously serve as both current return paths and radiation elements, creating multiple operating modes while maintaining a compact and integrated design.
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 enhanced antenna structure supports multiple operating modes, increases the antenna's equivalent diameter, and excites stronger transverse currents, thereby improving radiation performance and coverage, especially in the upper hemisphere.
Implementation Method 1
The first matching circuit includes a first capacitor, the second matching circuit includes a second capacitor
Data Source
AI summary
This application discloses an antenna structure and an electronic device. The antenna structure includes an antenna radiation body, a first coupled radiation branch, a second coupled radiation branch, a first feed, a first matching circuit, and a second matching circuit. The antenna radiation body is located between the first coupled radiation branch and the second coupled radiation branch, there is a gap between the antenna radiation body and the first coupled radiation branch, and there is a gap between the antenna radiation body and the second coupled radiation branch. The first feed is disposed between a first feed point on the antenna radiation body and a ground plane. The first matching circuit is disposed between a first position of the antenna radiation body and a ground plane. The second matching circuit is disposed between a second position of the antenna radiation body and a ground plane.