Coupled Radiating Elements for Shared MIMO Frequency Tuning
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Solution Overview
Problem
The increasing number of frequency bands supported by communication apparatuses leads to a higher cost due to the need for multiple frequency adjustment elements in MIMO systems, where each antenna requires a corresponding frequency adjustment element.
Innovation Solution
An antenna device with a reduced number of frequency adjustment elements, where a single frequency adjustment element is used to control the operating frequency bands by electric-field-coupling or magnetic-field-coupling between two radiating elements, allowing for multiple frequency bands to be adjusted collectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a frequency adjustment element is provided for each antenna in MIMO systems, then each antenna can independently adjust its operating frequency band, but the cost increases with the number of frequency adjustment elements
Solution Approach 1:
The patent merges the frequency adjustment function from individual antenna level to system level by coupling radiating elements between antennas. A single frequency adjustment element controls the resonant frequencies of multiple radiating elements through electromagnetic coupling, thereby reducing the total number of frequency adjustment elements while maintaining multi-frequency band support capability.
Solution Approach 2:
The frequency adjustment element is designed to serve multiple radiating elements simultaneously through coupling mechanisms. One frequency adjustment element can adjust the resonant frequencies of multiple radiating elements by exploiting electromagnetic coupling, making the frequency adjustment function universal across multiple antenna elements rather than dedicated to each individual antenna.
2Productivity
If the number of antennas is increased to support MIMO and multiple frequency bands, then communication capability is improved, but the number of frequency adjustment elements must also increase proportionally
Solution Approach 1:
The patent combines frequency adjustment resources across multiple antennas by establishing electromagnetic coupling between radiating elements. This allows a shared frequency adjustment mechanism to control multiple radiating elements, breaking the one-to-one correspondence between antennas and frequency adjustment elements, thereby supporting MIMO and multiple frequency bands with fewer adjustment elements.
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 reduces the number of frequency adjustment elements required, lowering costs while maintaining the ability to support multiple frequency bands, thereby enhancing the efficiency of communication apparatuses.
Implementation Method 1
a second radiating element at a position at which at least one of electric field coupling and magnetic field coupling to the first radiating element is capable of being generated
Implementation Method 2
a second radiating element at a position at which at least one of electric field coupling and magnetic field coupling to the first radiating element is capable of being generated
Implementation Method 3
the coupling of the first radiating element to the second radiating element is generated at a first point of the first radiating element where a maximum electric field is obtained at a resonant frequency
Data Source
AI summary
An antenna device includes first and second radiating elements, a frequency adjustment element, and first and second feed circuits. The second radiating element is at a position at which at least one of electric field coupling and magnetic field coupling to the first radiating element can be generated. The frequency adjustment element is connected to the first radiating element or the second radiating element. The first feed circuit is configured to supply a radio frequency signal to the first radiating element. The second feed circuit is configured to supply a radio frequency signal to the second radiating element.