Antenna Module Impedance Matching for 5G Isolation
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Solution Overview
Problem
Next-generation communication systems, particularly 5G, require antenna modules that minimize the number and length of antennas and transmission lines to reduce size and manufacturing costs while improving signal isolation between transmission and reception antennas.
Innovation Solution
The antenna module design includes transmission lines with lengths determined by impedance matching between antennas and wireless communication chips, utilizing different polarizations for each line to achieve isolation without additional components, allowing for efficient communication and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of antennas and transmission lines is increased to achieve isolation between transmission and reception antennas using horizontal and vertical polarization, then the isolation performance is improved, but the size and manufacturing cost of the antenna module increase
Solution Approach 1:
The patent combines transmission and reception antenna functions into a single antenna element that operates in different frequency bands. The same antenna structure is used for both transmission in the first frequency band and reception in the second frequency band, eliminating the need for separate antenna elements and reducing overall module size while maintaining isolation performance through frequency-based separation.
Solution Approach 2:
The antenna module employs a universal antenna structure that serves multiple functions: it acts as both a transmission antenna in the first frequency band and a reception antenna in the second frequency band. This multi-functional design reduces the number of components needed while achieving the required isolation through frequency-selective operation.
2Reliability
If the number of antennas and transmission lines is increased to achieve isolation between transmission and reception antennas using horizontal and vertical polarization, then the isolation performance is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines transmission and reception antenna functions into a single antenna element that operates in different frequency bands. The same antenna structure is used for both transmission in the first frequency band and reception in the second frequency band, eliminating the need for separate antenna elements and reducing overall module size while maintaining isolation performance through frequency-based separation.
Solution Approach 2:
The antenna module employs a universal antenna structure that serves multiple functions: it acts as both a transmission antenna in the first frequency band and a reception antenna in the second frequency band. This multi-functional design reduces the number of components needed while achieving the required isolation through frequency-selective operation.
3Volume of stationary object
If the length of transmission lines is reduced to minimize the layout of antennas and transmission lines, then the antenna module size is reduced, but the impedance matching between antennas and wireless communication chip becomes more difficult to achieve
Solution Approach 1:
The patent adjusts the electrical parameters of the transmission lines, specifically their length and characteristic impedance, to achieve optimal impedance matching between the antenna and wireless communication chip. By carefully controlling these parameters, the design achieves both compact size and proper impedance matching without requiring excessively long transmission lines.
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 design reduces the size and cost of the antenna module while enhancing isolation performance, minimizing interference between transmission and reception signals, thereby improving communication efficiency.
Implementation Method 1
A length of the at least one transmission line is determined based on an impedance seen from the antenna through the at least one transmission line when the first signal or the second signal flows through the transmission line
Implementation Method 2
the antenna module used in the next generation mobile communication system can achieve isolation between the transmission antenna and the reception antenna of the antenna by using the horizontal polarization and the vertical polarization
Data Source
AI summary
The present disclosure relates to a communication technique for converging Internet of Things (IoT) technology with a 5th Generation (5G) communication system for supporting a higher data transfer rate beyond a 4th Generation (4G) system, and a system therefor. The disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail business, and services associated with security and safety) on the basis of 5G communication technology and IoT-related technology. An antenna module is provided. The antenna module includes an antenna, and at least one transmission line configured to transmit a first signal through the antenna for transmission or receive a second signal through the antenna for reception. The length of the transmission line may be determined based on the impedance when the first signal or the second signal flows through the transmission line.