Multi-Band Front-End Circuitry With Shared PA Antenna Switching
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Solution Overview
Problem
Existing electronic devices with front end circuitry struggle to efficiently manage multiple frequency bands and antenna connections, leading to complexities in signal transmission and reception.
Innovation Solution
The electronic device incorporates multiple front end circuitries connected to different antennas, each equipped with power amplifiers and switches, allowing for flexible antenna switching and dual connectivity across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple front end circuitries are used to support multiple frequency bands, then frequency band coverage and communication robustness are improved, but device complexity increases
Solution Approach 1:
The first power amplifier is designed to perform multiple functions by supporting both the first frequency band (connected directly to second antenna) and the second frequency band (connected through first front end circuitry to first antenna). This multi-functionality allows the PA to serve multiple frequency bands with a single component, reducing the need for separate PAs for each band while maintaining comprehensive frequency coverage.
Solution Approach 2:
The patent combines the first power amplifier within the second front end circuitry, creating an integrated structure where the PA can be selectively connected to different antennas based on the required frequency band. This merging reduces the total number of discrete components and simplifies the overall device architecture while preserving the capability to support multiple frequency bands.
2Adaptability or versatility
If power amplifiers are integrated into front end circuitry for flexible antenna switching, then communication flexibility is improved, but thermal constraints worsen due to increased power density
Solution Approach 1:
The device is divided into multiple front end circuitries (first and second), each handling specific frequency bands with dedicated antenna connections. The first front end circuitry processes the first frequency band through the first antenna, while the second front end circuitry handles the second frequency band through the second antenna. This segmentation distributes thermal loads across separate circuit modules rather than concentrating all power amplification in a single integrated unit, thereby managing thermal constraints more effectively.
3Power
If multiple power amplifiers are used for different frequency bands, then transmit power capability is improved, but device size increases
Solution Approach 1:
The first power amplifier is designed as a universal component capable of amplifying signals for both the first frequency band (when connected to the second antenna) and the second frequency band (when connected through the first front end circuitry to the first antenna). This multi-functional design eliminates the need for separate dedicated PAs for each frequency band, reducing the total component count and device area while maintaining full transmit power capability across all supported frequency bands.
Data Source
AI summary
An electronic device is provided. The electronic device includes a first antenna. The electronic device includes a second antenna. The electronic device includes first front end circuitry including a low noise amplifier (LNA) configured to be connected to the first antenna to amplify a first signal on a downlink frequency range of a first frequency band received through the first antenna. The electronic device includes second front end circuitry that includes a first power amplifier (PA) configured to be connected to the first antenna through the first front end circuitry to obtain transmit (Tx) power of a second signal on an uplink frequency range of the first frequency band that is transmitted through the first antenna, and a second PA configured to be connected to the second antenna to obtain a Tx power of a third signal on an uplink frequency range of a second frequency band transmitted through the second antenna.