RF PA Mid Integration for Multi-Antenna SRS Polling
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Solution Overview
Problem
The integration of multiple discrete switches in radio-frequency systems for supporting polling transmission among multiple antennas leads to increased cost and substrate area occupation, which is not efficient for 5G communication technologies.
Innovation Solution
Integrating a power amplifier, first filtering unit, and multi-channel selection switch into a single chip within the radio-frequency PA Mid device, reducing the substrate area by at least 10 mm^2 and maintaining the same size as the device without the multi-channel selection switch, while supporting polling transmission among multiple antennas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple discrete switches are disposed in transmitting paths to support polling transmission among multiple antennas, then the radio-frequency system can achieve polling transmission among multiple antennas, but the cost increases and the substrate area occupied becomes relatively large
Solution Approach 1:
The patent combines multiple discrete switches into a single multi-channel selection switch component. This merging approach maintains the polling transmission capability among multiple antennas while significantly reducing the substrate area occupied by switch components and simplifying the overall circuit structure.
Solution Approach 2:
The multi-channel selection switch is designed to perform multiple functions: it can selectively connect different antennas to the power amplifier and dithering injection unit, enabling polling transmission among multiple antennas while also providing filtering and signal injection capabilities through integrated components.
2Adaptability or versatility
If multiple discrete switches are disposed in transmitting paths to support polling transmission among multiple antennas, then the radio-frequency system can achieve polling transmission among multiple antennas, but the cost increases
Solution Approach 1:
The patent merges multiple discrete switch components into a single multi-channel selection switch, reducing the total component count and associated manufacturing costs. The integrated design eliminates the need for multiple separate switch devices, thereby lowering material costs and assembly complexity.
Solution Approach 2:
The integrated multi-channel selection switch provides universal functionality for antenna selection while incorporating additional features such as filtering and dithering injection, reducing the need for separate components and thereby lowering overall system cost.
3Ease of manufacture
If the power amplifier, first filtering unit, and multi-channel selection switch are integrated into the same chip, then the integration level increases and costs are reduced, but the device complexity increases
Solution Approach 1:
The patent integrates the power amplifier, first filtering unit, and multi-channel selection switch into a single chip package. This merging approach reduces the number of external components and interconnections, simplifying the overall system architecture despite the increased integration complexity within the chip itself.
Solution Approach 2:
The patent employs a nested integration structure where the multi-channel selection switch, power amplifier, and filtering unit are combined in a hierarchical manner within the same chip, with each component nested within the integrated circuit package, thereby reducing external connections and simplifying system-level complexity.
Data Source
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Figure 4A~4B
Figure 5A~5B
AI summary
Provided is a radio-frequency Power Amplifier Modules including Duplexers (PA Mid) device. The radio-frequency PA Mid device has a transmitting port (RFIN) configured to connect to a radio-frequency transceiver and a plurality of antenna ports (SRS) configured to connect to an antenna. The radio-frequency PA Mid device includes: a power amplifier (110) having an input terminal connected to the transmitting port (RFIN) to perform a power amplification processing on a received radio-frequency signal; a first filtering unit (110) connected to an output terminal of the power amplifier (110) to perform a filtering processing on the received radio-frequency signal; and a multi-channel selection switch (130) including at least one first terminal and a plurality of second terminals. The multi-channel selection switch (130) has one of the at least one first terminal connected to the first filtering unit (110) and the plurality of second terminals connected to the plurality of antenna ports (SRS) in a one-to-one correspondence to selectively switch on a transmitting path between the transmitting port (RFIN) and any one of the plurality of antenna ports (SRS), for transmitting the radio-frequency signal and supporting a function of polling transmission of a Sounding Reference Signal (SRS) among the plurality of antenna ports (SRS).