RF Module Layout for Low-Loss 5G-NR Hybrid Filter Paths
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Solution Overview
Problem
Hybrid acoustic LC filters with multiple transfer paths in radio-frequency modules for multiple bands suffer from increased wiring losses due to numerous components, leading to poor low-loss signal transfer characteristics.
Innovation Solution
A radio-frequency module design with hybrid filters and power amplifiers arranged on a substrate, where power amplifiers and inductors are positioned closer to a reference point, and hybrid filters are disposed closer to the center, reducing wiring lengths and losses across multiple communication bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hybrid acoustic LC filter is formed by an acoustic wave resonator element-inductor-capacitor combination, then the filter achieves a wide pass band and strict out-of-band rejection, but the filter includes many components which increases wiring losses in the radio-frequency module
Solution Approach 1:
The patent combines multiple filter functions into a single integrated filter unit that incorporates both the acoustic wave resonator element and the inductor-capacitor combination. This merging reduces the number of separate components and their interconnections, thereby reducing wiring losses while maintaining the wide pass band and strict out-of-band rejection characteristics.
Solution Approach 2:
The integrated filter unit serves multiple functions simultaneously: it provides both the acoustic wave filtering characteristics and the inductor-capacitor tuning functionality within a single component structure. This multi-functionality eliminates the need for separate discrete components, reducing wiring losses while achieving the desired signal transfer characteristics across multiple bands.
2Adaptability or versatility
If a radio-frequency module for multiple bands has multiple transfer paths each including the hybrid acoustic LC filter, then the module supports multiple communication bands, but the wiring losses in the transfer paths increase
Solution Approach 1:
The patent segments the multi-band filter system into multiple independent integrated filter units, each handling specific frequency bands. By segmenting the transfer paths into separate integrated units rather than using a single complex multi-band filter, the wiring losses in each path are minimized while maintaining overall multi-band capability.
Solution Approach 2:
The patent merges the acoustic wave resonator and inductor-capacitor components into unified integrated filter units for each transfer path. This merging reduces the number of discrete components and interconnections in each path, thereby reducing wiring losses while preserving the multi-band adaptability of the radio-frequency module.
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 design achieves low-loss signal transfer characteristics by minimizing wiring losses and reducing power consumption in the radio-frequency module for multiple bands.
Implementation Method 1
a first hybrid filter including a first acoustic wave resonator element, a first inductor, and a first capacitor
Data Source
AI summary
A radio-frequency module includes a hybrid filter for 5th Generation New Radio (5G-NR) n77, a filter for 5G-NR n79, power amplifiers, a third inductor coupled to the power amplifier, and a fourth inductor coupled to a power amplifier. When a module substrate is viewed in plan view, the power amplifiers are disposed in a first quadrant, the third inductor and the fourth inductor are disposed in a second quadrant, the hybrid filter and the filter are disposed in a third quadrant, the power amplifier is disposed closer to a reference point than the power amplifier, the third inductor is disposed closer to the reference point than the fourth inductor, and the hybrid filter is disposed closer to the reference point than the filter.