Annular Circularly Polarized Antenna Layout for Easier Frequency Tuning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies face increased complexity and reduced efficiency in adjusting the operating frequency of circularly polarized antennas due to constraints imposed by physical dimensions, affecting wearable devices.
Innovation Solution
A circularly polarized antenna design with a frequency tunning component connected at specific angles and positions on the annular radiator, maintaining a 90° phase difference between resonant modes, and a dual-frequency design using FM filters to adjust frequencies without affecting polarization formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic components are used to adjust the operating frequency of the circularly polarized antenna, then the frequency can be tuned, but the complexity of adjusting the operating frequency increases and the adjustment efficiency is reduced
Solution Approach 1:
The patent extracts the frequency tuning function from the circular polarization formation mechanism by using separate electronic components (inductors or capacitors) connected to specific positions on the annular radiator. This separation allows independent adjustment of operating frequency without affecting the circular polarization characteristics, thereby reducing adjustment complexity while maintaining frequency adaptability
Solution Approach 2:
The patent introduces electronic components (inductors or capacitors) as intermediary elements between the power source and the annular radiator. These intermediaries enable frequency tuning by modifying the resonant frequency of the radiator without directly interfering with the circular polarization formation mechanism, thus improving frequency adaptability while keeping the adjustment process simple
2Adaptability or versatility
If electronic components are used to adjust the operating frequency, then frequency tuning is achieved, but the adjustment efficiency is reduced
Solution Approach 1:
By extracting the frequency tuning function to separate electronic components connected at specific positions on the radiator, the patent enables rapid frequency switching without requiring mechanical adjustments or complex reconfigurations. This extraction improves adjustment efficiency while maintaining full frequency tuning capability
Solution Approach 2:
The patent utilizes parameter changes in electronic components (varying inductance or capacitance values) to adjust the operating frequency. This approach allows for efficient and rapid frequency tuning by simply changing the electrical parameters of the components rather than physically reconfiguring the antenna structure, thereby improving adjustment efficiency
3Volume of moving object
If the physical dimensions of the antenna structure are constrained, then the antenna size is reduced, but the complexity of adjusting the operating frequency increases
Solution Approach 1:
The patent compensates for the limited physical dimensions by using parameter changes in electronic components (inductors or capacitors) to achieve frequency tuning. This allows the antenna to maintain a compact size while still providing full frequency adjustment capability through electrical parameter modification rather than physical dimension changes
Solution Approach 2:
The electronic components serve as intermediaries that enable frequency adjustment without requiring changes to the physical dimensions of the antenna structure. This mediation allows the antenna to remain compact while providing flexible frequency tuning through the electronic components connected to the annular radiator
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
Reduces adjustment complexity and enhances efficiency in tuning operating frequencies, minimizing spatial footprint and improving satellite positioning performance.
Implementation Method 1
a frequency tunning component, configured to adjust a frequency of the communication frequency band of the circularly polarized antenna, the frequency tunning component being electrically connected to the radiator at the access portion
Implementation Method 2
a feeding terminal, one end of the feeding terminal being electrically connected to the radiator at a feeding point, and another end of the feeding terminal being electrically connected to the main board
Data Source
AI summary
A circularly polarized antenna is provided, including a main board; an annular radiator provided with an access portion; a feeding terminal, one end of the feeding terminal is electrically connected to the radiator at a feeding point, and the other end of the feeding terminal is electrically connected to the main board; a frequency tunning component which is configured to adjust a frequency of the communication frequency band of the circularly polarized antenna, and is electrically connected to the radiator at the access portion. A first connecting line is a line connecting the feeding point and a center point of the annular radiator, a second connecting line is a line connecting the access portion and the center point of the radiator, and the first connecting line and a second connecting line form a first included angle α along a counterclockwise circumferential direction of the radiator, where, α∈(80°, 100°)∪(170°, 190°)∪(260°, 280°).