Antenna Matching Apparatus for Carrier Aggregation
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Solution Overview
Problem
Existing antenna matching systems for mobile communication terminals fail to maintain optimal transmission-reception characteristics across multiple frequency bands during carrier aggregation, leading to degraded communication performance when both low and high bands are simultaneously used.
Innovation Solution
An antenna matching apparatus comprising high and low pass filters, switches, and phase circuits that allow for independent matching of high and low band antennas, ensuring excellent matching in both bands even during carrier aggregation, thereby enhancing communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a matching circuit is adjusted for one band in carrier aggregation, then the matching for that band is optimized, but the matching for other bands deteriorates
Solution Approach 1:
The matching circuit is divided into multiple independent matching units, each dedicated to a specific frequency band. Each matching unit includes its own matching element (inductor or capacitor) and switch, allowing independent adjustment and optimization for each band without affecting other bands. This segmentation enables simultaneous optimal matching across multiple bands during carrier aggregation.
Solution Approach 2:
The matching circuit employs switches to dynamically connect different matching elements based on the active frequency band. When carrier aggregation is detected, the control unit activates specific switches to enable multiple matching units simultaneously, allowing the circuit to adapt its configuration in real-time to maintain optimal matching across aggregated bands.
2Device complexity
If a single matching circuit is used for multiple bands, then the device complexity is reduced, but the transmission-reception characteristics in each band deteriorate
Solution Approach 1:
Rather than using a single complex adjustable matching circuit, the invention segments the matching function into multiple simple, fixed-value matching units. Each unit is optimized for a specific band with a dedicated matching element, eliminating the need for complex adjustable components while maintaining simple overall circuit structure.
Solution Approach 2:
Each matching unit is designed with local optimization for its specific frequency band, using matching elements with values specifically tailored to that band's characteristics. This local quality approach ensures optimal transmission-reception characteristics for each band without requiring a universally complex circuit design.
3Productivity
If the matching circuit is optimized for carrier aggregation, then the communication performance improves, but the matching for individual bands may deteriorate
Solution Approach 1:
The control unit dynamically determines the operating mode (single band or carrier aggregation) and configures the matching circuit accordingly. When carrier aggregation is detected, multiple matching units are activated simultaneously; when operating in a single band, only the corresponding matching unit is active. This dynamic reconfiguration ensures optimal matching precision in all operating conditions while maximizing communication performance during carrier aggregation.
Solution Approach 2:
The circuit changes its effective configuration by switching between different combinations of matching units based on the operating mode. The switch states are changed to either enable all matching units for carrier aggregation or enable only the relevant unit for single-band operation, thereby adapting the circuit's electrical characteristics to match the required operating conditions.
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 solution effectively suppresses the reduction in transmission-reception characteristics across bands, improving communication performance by ensuring excellent matching in both high and low bands during carrier aggregation, thus enhancing the overall communication speed and reliability of mobile communication terminals.
Implementation Method 1
The high pass filter includes one end connected to the first terminal. The high pass filter is a filter that transmits a signal in a first frequency band.
Implementation Method 2
The low pass filter includes one end connected to the first terminal. The low pass filter is a filter that transmits a signal in a second frequency band lower than the first frequency band.
Data Source
AI summary
A high pass filter includes a first end connected to a first terminal and is a filter that transmits a signal in a first frequency band. A second terminal is connected to a second end of the high pass filter. A first switch includes a first end connected to the second end of the high pass filter. A third terminal is connected to a second end of the first switch. A low pass filter includes a first end connected to the first terminal and is a filter that transmits a signal in a second frequency band lower than the first frequency band. A fourth terminal is connected to a second end of the low pass filter. A second switch includes a first end connected to the second end of the low pass filter. A fifth terminal is connected to the second end of the second switch.