RF Filter and Combiner Layout for Multiple Power Classes
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional radio frequency circuits struggle to support multiple power classes, which limits their versatility and efficiency in various communication systems.
Innovation Solution
A radio frequency circuit design that includes a first filter and a second filter, both with passbands covering a specific transmission band, a combiner, and a switch configuration that allows for the combination and routing of transmission signals to support multiple power classes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional radio frequency circuit is used, then the circuit structure is simple, but it cannot support multiple power classes
Solution Approach 1:
The radio frequency circuit is divided into multiple independent signal paths, each capable of handling different power classes. The circuit includes a first signal path with a first power amplifier for a first power class and a second signal path with a second power amplifier for a second power class, allowing each path to be optimized independently for its specific power requirements.
Solution Approach 2:
The radio frequency circuit is designed to perform multiple functions by incorporating both a first power amplifier for a first power class and a second power amplifier for a second power class within the same circuit. This multi-functional design enables the circuit to support multiple power classes and operate across different transmission bands, achieving versatility without requiring separate dedicated circuits for each power class.
2Adaptability or versatility
If filters are designed for high power durability to support multiple power classes, then multiple power classes can be supported, but the filter size and complexity increase
Solution Approach 1:
The filtering function is segmented into multiple dedicated filters, each optimized for a specific power class. The circuit includes a first filter for the first power class and a second filter for the second power class, allowing each filter to be designed with appropriate power durability requirements rather than requiring all filters to handle maximum power levels.
Solution Approach 2:
Each filter is designed with local quality optimized for its specific operating conditions. The first filter is designed with power durability appropriate for the first power class, while the second filter is designed with power durability appropriate for the second power class, rather than requiring all filters to have uniform high power durability for all power classes.
3Adaptability or versatility
If a single power amplifier is used, then the circuit is simpler, but it cannot efficiently support multiple power classes
Solution Approach 1:
The power amplification function is segmented into multiple dedicated amplifiers, each optimized for a specific power class. The circuit includes a first power amplifier for the first power class and a second power amplifier for the second power class, allowing each amplifier to operate in its optimal efficiency range for its designated power level.
Solution Approach 2:
The circuit dynamically selects which power amplifier to use based on the required power class. A switching mechanism routes signals through the first power amplifier when the first power class is required and through the second power amplifier when the second power class is required, enabling efficient adaptation to different power requirements.
Data Source
AI summary
A radio frequency circuit includes: a first filter having a passband that includes a transmission band of a first band to which power classes are applicable; a second filter having a passband that includes the transmission band of the first band; a first combiner that includes a first input terminal, a second input terminal, and an output terminal; and a first switch that includes a first terminal, a second terminal, a third terminal, a fourth terminal, and a fifth terminal. The output terminal of the first combiner is connected to an antenna connection terminal.