Dual Circularly Polarized Antenna Layout With Lower Signal Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional antenna structures achieve circular polarization at high cost due to the use of dual-feed phase shifters, leading to significant signal loss.
Innovation Solution
A dual circularly polarized antenna structure with overlapping sub-antennas and a feed module that generates opposite circular polarizations using 180-degree and 90-degree phase differences, reducing the need for phase shifters and minimizing signal loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antenna structures use dual-feed phase shifters to achieve circular polarization, then circular polarization is achieved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and removes the phase shifter component from the antenna system. Instead of using dual-feed phase shifters to achieve circular polarization, the invention uses a single feed point with specifically designed antenna elements (orthogonal dipoles or patch antennas with 90-degree phase difference in current distribution) that inherently generate circular polarization, thereby eliminating the expensive phase shifter hardware
Solution Approach 2:
The patent uses geometric symmetry and repetition to create the circular polarization effect. By arranging identical antenna elements in orthogonal orientations with specific spatial relationships (90-degree phase difference), the system copies the polarization function through structural design rather than requiring active phase-shifting components
2Reliability
If conventional antenna structures use power dividers to achieve circular polarization, then circular polarization is achieved, but signal loss increases
Solution Approach 1:
The patent removes the power divider from the signal path. Instead of splitting the signal through a power divider and introducing loss, the invention feeds a single signal to an antenna structure that naturally divides the current into orthogonal components with 90-degree phase difference through its geometric design, avoiding the insertion loss of power divider components
Solution Approach 2:
The antenna structure performs the polarization function autonomously through its own geometry. The antenna elements are designed so that the incident signal automatically generates orthogonal current distributions with the required phase difference, making the system self-sufficient without requiring external power division or phase shifting components that would introduce loss
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 proposed antenna structure achieves low manufacturing costs and reduced signal loss by utilizing a feed module with overlapping sub-antennas and specific phase differences, enabling efficient dual circular polarization.
Implementation Method 1
a 90-degree phase difference is provided between each of the first receiving feed points and any one of the second receiving feed points
Implementation Method 2
the feed module is electrically coupled to each of the M antenna arrays for generating a first circular polarization and a second circular polarization
Data Source
AI summary
A dual circularly polarized antenna structure includes a substrate, an M number of antenna arrays, and a feed module. Each of the antenna arrays includes two first antennas and two second antennas. Each of the first antennas and the second antennas includes two sub-antennas and two microstrip lines electrically coupled to the two sub-antennas. The two sub-antennas of the first antenna overlap through translation. The two sub-antennas of the second antenna overlap through translation. A center point is defined between the first antennas and the second antennas. One of the sub-antennas of each of the first antennas and one of the sub-antennas of each of the second antennas are adjacent to the center point, and have a 4-fold rotational symmetry relative to the center point. The feed module is electrically coupled to each of the antenna arrays for generating a first circular polarization and a second circular polarization.