Dual Loop Antenna Phase Control for Balanced Communication Area
Solution Overview
Problem
Existing dual loop antennas struggle to create a balanced communication area in all directions, particularly front-back and right-left, while being centered, as they expand the communication area mainly in one direction.
Innovation Solution
A dual loop antenna configuration where two loop antennas are serially arranged with opposite magnetic moment vectors, and the phase difference between their feed signals is adjusted between 130° to 230°, along with the substrates being oriented to prevent unstable communication characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two loop antennas are arranged with parallel or antiparallel magnetic moments and connected in series, then the communication area is expanded in the direction of arrangement, but the communication area becomes unbalanced in front-back and right-left directions
Solution Approach 1:
The patent applies asymmetry by intentionally creating unbalanced magnetic field distributions in specific directions. By arranging loop antennas with controlled phase differences (130°-230°) and using asymmetric substrate orientations, the antenna system creates stronger magnetic fields in desired directions while suppressing fields in other directions, achieving a balanced overall communication area despite asymmetric individual contributions
Solution Approach 2:
The patent transitions from one-dimensional linear arrangement to three-dimensional spatial distribution by tilting substrates at specific angles relative to each other. This dimensional change allows the antenna system to create a more uniform spherical communication area by distributing magnetic field strength uniformly in three-dimensional space, resolving the imbalance problem caused by planar arrangements
2Area of stationary object
If loop antennas are arranged to expand communication area in one direction, then the communication area increases, but the aspect ratio and uniformity of magnetic field distribution deteriorate
Solution Approach 1:
The patent applies local quality by creating directionally selective magnetic field distributions. Each loop antenna is configured with specific phase differences and substrate orientations to generate strong magnetic fields in desired local directions while suppressing fields in other directions. This localized control of field quality enables the overall system to achieve uniform spherical coverage with improved aspect ratio
Solution Approach 2:
The patent uses counterweight by balancing the directional biases of individual loop antennas. By setting phase differences between 130°-230° and using complementary substrate orientations, the strong field generation in one direction is counterbalanced by suppressed fields in perpendicular directions, resulting in uniform overall distribution and improved aspect ratio
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
This configuration allows for a well-balanced communication area with improved aspect ratio and reduced instability, ensuring consistent magnetic field distribution across all directions.
Implementation Method 1
A dual loop antenna includes a first loop antenna and a second loop antenna, each having a loop surface extending in a vertical direction... magnetic fields generated by the two loop coils may have mutually opposite phases
Implementation Method 2
magnetic field distribution created by the dual loop antenna... magnetic fields generated by the two loop coils may have mutually opposite phases
Data Source
Figure 1
Figure 2~3
Figure 4(a)~4(b)
AI summary
A dual loop antenna is provided which can clearly set a boundary of a communication area and create a well-balanced communication area. A dual loop antenna 100 includes a first loop antenna 11 and a second loop antenna 21. The first loop antenna 11 and the second loop antenna 21 are formed on an x-y plane. The center of the first loop antenna 11 and the center of the second loop antenna 21 are located at positions on an x-axis at the same distance from the point of origin being the center of the dual loop antenna 100. A phase difference between currents flowing on the first loop antenna 11 and the second loop antenna 21, respectively, is a value in a range from 130 degrees to 230 degrees.