Duplexer TX Contour Alignment for Multi-Band RF Front Ends
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Solution Overview
Problem
Front end architectures in radio-frequency devices require numerous impedance matching components, leading to increased cost, complexity, and space usage due to the need for multiple matching networks to accommodate various frequency bands.
Innovation Solution
The proposed front end architectures conglomerate transmission contours by configuring duplexers to present a targeted impedance zone, eliminating the need for additional matching components between the transmission switch and duplexers, and using shunt capacitors where necessary to align contours within this zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple impedance matching components are included to enable proper operation of each frequency band, then transmission performance across multiple frequency bands is improved, but device complexity and the number of components increase
Solution Approach 1:
The duplexer is designed to serve multiple frequency bands simultaneously with a single device, eliminating the need for separate matching networks for each band. The resonator within the duplexer is configured to provide impedance matching across multiple bands, making the duplexer a multi-functional component that handles both filtering and impedance matching for various frequency bands
Solution Approach 2:
The patent combines the impedance matching function with the duplexer structure by integrating a resonator directly into the duplexer circuit. This merging of functions allows the same component to perform both signal filtering and impedance matching, reducing the total component count while maintaining multi-band operation capability
2Adaptability or versatility
If numerous impedance matching components are used to accommodate various frequency bands, then transmission performance is improved, but manufacturing cost increases
Solution Approach 1:
The duplexer is designed to serve multiple frequency bands simultaneously with a single device, eliminating the need for separate matching networks for each band. The resonator within the duplexer is configured to provide impedance matching across multiple bands, making the duplexer a multi-functional component that handles both filtering and impedance matching for various frequency bands
Solution Approach 2:
The patent combines the impedance matching function with the duplexer structure by integrating a resonator directly into the duplexer circuit. This merging of functions allows the same component to perform both signal filtering and impedance matching, reducing the total component count while maintaining multi-band operation capability
3Adaptability or versatility
If multiple impedance matching components are included for each frequency band, then proper operation across bands is achieved, but space requirements increase
Solution Approach 1:
The duplexer is designed to serve multiple frequency bands simultaneously with a single device, eliminating the need for separate matching networks for each band. The resonator within the duplexer is configured to provide impedance matching across multiple bands, making the duplexer a multi-functional component that handles both filtering and impedance matching for various frequency bands
Solution Approach 2:
The patent combines the impedance matching function with the duplexer structure by integrating a resonator directly into the duplexer circuit. This merging of functions allows the same component to perform both signal filtering and impedance matching, reducing the total component count while maintaining multi-band operation capability
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 approach reduces the number of surface mount technology components, lowers costs, minimizes space requirements, and enhances performance across a wider range of frequency bands without additional matching networks.
Implementation Method 1
individual duplexers of the plurality of duplexers include a resonator tuned so that signals within the particular frequency range of that duplexer have a contour within the target impedance zone
Implementation Method 2
a shunt capacitor between a duplexer of the plurality of duplexers and the transmission switch, the shunt capacitor configured to rotate transmission signals of a particular frequency band into the target impedance zone
Data Source
AI summary
The disclosed front end architectures are configured to conglomerate duplexer transmission (TX) contours into a specific or targeted region. This enables the power amplifier (PA) to match a larger number of frequency bands without the help of additional matching networks. The disclosed architectures are advantageous because they reduce the number of components (e.g., surface mount technology components (SMTs)) required for radio-frequency (RF) modules, such as front end modules, power amplifier modules, and the like. The disclosed architectures are also advantageous because they improve performance of the modules across a wider range of frequency bands.