Multi-Band RF Filter and Amplifier Circuit for Compact Mobile Radios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing number of circuit components in mobile communication equipment to support multiple satellite systems and cellular communication systems leads to a size increase, necessitating a solution that supports both without enlarging the apparatus.
Innovation Solution
A radio-frequency circuit design incorporating a first filter with pass bands for cellular and satellite systems, an amplifier with adjustable amplification modes, and a switch to selectively connect input terminals, reducing the number of required components and enabling support for both systems without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple modules are individually installed to support different satellite systems and cellular communication systems, then the communication apparatus can support multiple bands and systems, but the size of the mobile communication equipment increases
Solution Approach 1:
The patent combines multiple filter functions into a single first filter that handles both cellular communication bands and satellite system bands. This merging of functions reduces the number of separate modules needed, thereby decreasing the overall size of the communication apparatus while maintaining support for multiple communication systems
Solution Approach 2:
The first filter is designed with multi-functionality to serve multiple purposes: it filters signals for cellular communication systems and simultaneously filters signals for satellite communication systems. This universal component replaces what would traditionally require separate dedicated filters for each system, reducing device size
2Adaptability or versatility
If the number of circuit components is increased to support multiple bands, then the communication apparatus can handle more communication systems, but the device complexity increases
Solution Approach 1:
The patent merges multiple band-filtering functions into a single first filter component. Instead of having separate filters for cellular bands and satellite bands, one filter performs all filtering operations across multiple bands, thereby reducing the total number of circuit components while maintaining multi-band support
Solution Approach 2:
The first filter is designed as a universal component that can handle different communication systems and bands through its multiple pass bands. This multi-functional design eliminates the need for multiple dedicated components, reducing overall device complexity
Data Source
AI summary
A radio-frequency circuit includes a filter circuit and a power amplifier circuit. The filter circuit includes a first pass band corresponding to a band of a cellular communication system and a second pass band corresponding to a band of a satellite communication system. The power amplifier is connected to the filter circuit. The second pass band is positioned between the first pass band and a third pass band corresponding to a band of a satellite navigation system, or the second pass band at least partially matches the first pass band.