Antenna System With Integrated Passive Components For Multi-Band Filtering
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Solution Overview
Problem
Antenna systems experience nonlinear distortion and increased power loss due to signal interference from multiple bands, leading to significant power distortion, especially at higher power levels, which affects signal quality.
Innovation Solution
The integration of N integrated passive components (IPCs) and M receiving switches directly coupled to an antenna, with bypass switches having high turning-on impedances and small gate widths, effectively filters signals and reduces parasitic capacitance, preventing interference between different bands and improving nonlinear distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple bands are transmitted through the antenna system, then the functionality and versatility of the system is improved, but signal interference and nonlinear distortion increase
Solution Approach 1:
The patent divides the antenna system into multiple independent signal paths, each dedicated to a specific frequency band with its own LNA. This segmentation prevents signals from different bands from interfering with each other, as each band is processed separately through dedicated components rather than sharing common signal paths.
Solution Approach 2:
The patent introduces band-selective switches and filtering components as intermediaries between the antenna and individual LNAs. These intermediaries selectively pass only the desired frequency band to the corresponding LNA while blocking other bands, thereby preventing inter-band interference and allowing multiple bands to coexist without distortion.
2Power
If higher power output signals are transmitted, then the transmission capability is improved, but power loss and nonlinear distortion increase
Solution Approach 1:
The patent segments the power amplification function into multiple independent LNAs, each optimized for specific frequency bands. This allows each LNA to operate at optimal power levels for its designated band, avoiding the excessive power loss that occurs when a single amplifier must handle all bands at high power levels.
Solution Approach 2:
The patent changes the operating parameters of each LNA to match the specific requirements of its assigned frequency band. By optimizing gain, impedance, and power consumption parameters individually for each band, the system achieves high output power for each band without the cumulative power loss associated with broadband amplification.
3Device complexity
If integrated passive components are used, then the device size and cost are reduced, but parasitic capacitance effects increase
Solution Approach 1:
The patent carefully controls the physical dimensions and electrical parameters of the integrated passive components (inductors, capacitors, resistors) to minimize parasitic capacitance effects. By optimizing component values and layout parameters, the design achieves compact integration while maintaining signal integrity across multiple frequency bands.
Solution Approach 2:
The patent applies different design qualities to different parts of the integrated circuit. Critical signal paths use components with minimized parasitic effects, while less critical functions can tolerate higher integration density. This localized optimization allows compact integration without sacrificing performance in sensitive areas.
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 suppresses signal interference between various bands, enhances signal quality by reducing nonlinear distortion, and minimizes parasitic capacitance effects, leading to improved output power handling and reduced distortion at higher power levels.
Implementation Method 1
A first end of each IPC of the N IPCs is directly coupled to the antenna, for receiving signals of a band corresponding to the IPC from the antenna and filtering signals of bands corresponding to other IPCs of the N IPCs
Implementation Method 2
A first end of each of the M receiving switches is directly coupled to the antenna for receiving signal from the antenna by turning on the switch
Data Source
AI summary
An antenna system includes an antenna and N integrated passive components (IPCs). A first end of each IPC of the N IPCs is directly coupled to the antenna for receiving signals of a band corresponding to the IPC and filtering signals of bands corresponding to other IPCs of the N IPCs. The antenna system can prevent signals of various bands from interfering with each other, reduces parasitic effect, and further improves nonlinear distortion.