High Frequency Circuit Multi-Band Filter Switch Configuration
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Solution Overview
Problem
Existing high frequency circuits in mobile communication devices experience a decrease in noise figure (NF) due to the adoption of carrier aggregation, dual connectivity, and multiple-input multiple-output (MIMO) technologies, which affects data rate improvements.
Innovation Solution
A high frequency circuit design that includes multiple filters and switches, allowing for simultaneous reception of multiple frequency bands across different regions, reducing parasitic capacitance and improving NF by optimizing filter connections and switch configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation, dual connectivity, and MIMO are adopted to improve data rates, then multi-band and multi-antenna reception is enabled, but noise figure decreases
Solution Approach 1:
The patent divides the frequency band reception into separate paths using multiple filters (first filter for first band, second filter for second band, third filter for first band, fourth filter for third band) and switches to handle different band combinations. This segmentation allows selective signal routing that prevents noise figure degradation while maintaining multi-band reception capability for improved data rates.
Solution Approach 2:
The patent employs switches that can dynamically connect different filters and terminals based on the operating mode (first mode, second mode, third mode). This dynamic reconfiguration allows the system to optimize the signal path for each specific carrier aggregation or dual connectivity scenario, maintaining low noise figure across different frequency band combinations while supporting high data rates.
2Adaptability or versatility
If multiple filters and switches are used to support multiple frequency bands and regions, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent designs filters and switches to serve multiple functions across different operating modes. For example, the first filter handles both first band and fifth band signals, and the switches can configure various connection patterns for different region combinations. This multi-functionality reduces the total number of components needed while maintaining broad adaptability across frequency bands and regions.
Solution Approach 2:
The patent combines multiple filter functions and switch configurations into an integrated high frequency circuit. By merging the first filter, second filter, third filter, fourth filter, and multiple switches into a single unified circuit design, the patent reduces overall device complexity while maintaining the ability to support multiple frequency bands and regions through coordinated operation of the integrated components.
Data Source
AI summary
A high frequency circuit includes a filter that has a passband including a reception band of a first band that can be used in a first region and a second region, a filter that has a passband including a reception band of a second band that can be used in the first region, a filter 330 that has a passband including the reception band of the first band, a filter that has a passband including a reception band of a third band that can be used in the second region, and a switch including a terminal connected to an antenna connection terminal, a terminal connected to an antenna connection terminal, a terminal connected to a plurality of filters including the filters and, and a terminal connected to a plurality of filters including the filters.