SRS Antenna Switching Layout for Lower PCB Loss and IL Imbalance
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Solution Overview
Problem
Increasing the number of transmission antennas for SRS transmission in electronic devices to enhance data throughput leads to increased power loss and IL imbalance due to multiple conductive wiring lines, complicating PCB design and reducing actual data throughput.
Innovation Solution
The electronic device employs a configuration with reduced conductive wiring lines by using multiple antennas and RFFE units, along with a communication processor to control switches for sequential connections during SRS transmission, minimizing power loss and IL imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple conductive wiring lines are employed to increase the number of transmission antennas for SRS, then the number of transmission antennas increases, but power loss and IL imbalance increase
Solution Approach 1:
The patent segments the transmission function by using a single conductive wiring line that is sequentially connected to multiple antennas through switches. Instead of having separate wiring lines for each antenna, the system divides the transmission process into time segments where each antenna is activated in sequence, thereby reducing the number of physical wiring lines while maintaining multiple transmission capabilities.
Solution Approach 2:
The patent employs dynamic switching mechanisms that allow a single conductive wiring line to be dynamically connected to different antennas based on transmission requirements. The switches enable the wiring line to change its connection state sequentially, providing adaptive transmission paths that reduce static wiring complexity and associated power losses.
2Quantity of substance
If multiple conductive wiring lines are employed to increase the number of transmission antennas for SRS, then the number of transmission antennas increases, but IL imbalance between transmission wiring lines increases
Solution Approach 1:
By segmenting the transmission process into sequential time slots with a single wiring line, the patent eliminates IL imbalance issues that arise from having multiple wiring lines with different characteristics. Each antenna receives signals through the same standardized connection interface, ensuring consistent impedance and signal quality across all transmission paths.
Solution Approach 2:
The single conductive wiring line is designed to serve multiple antenna interfaces universally. By creating a multi-functional wiring solution that can connect to any antenna in the array through sequential switching, the patent ensures that all transmission paths share identical electrical characteristics, thereby maintaining uniform IL balance across all antennas.
3Quantity of substance
If multiple conductive wiring lines are employed to increase the number of transmission antennas for SRS, then the number of transmission antennas increases, but mounting area for conductive wiring lines increases
Solution Approach 1:
The patent segments the spatial arrangement by using a single wiring line that serves multiple antennas sequentially rather than requiring simultaneous connections. This temporal segmentation allows the system to achieve multi-antenna functionality with minimal physical wiring space, dramatically reducing the mounting area required on the PCB.
Solution Approach 2:
The patent transitions from a spatial arrangement (multiple parallel wiring lines) to a temporal arrangement (sequential switching of a single wiring line). By adding the time dimension to the transmission architecture, the system achieves multi-antenna capability without proportionally increasing the physical mounting area, effectively utilizing the fourth dimension (time) to resolve spatial constraints.
4Quantity of substance
If multiple conductive wiring lines are employed to increase the number of transmission antennas for SRS, then the number of transmission antennas increases, but device complexity increases
Solution Approach 1:
The patent merges multiple wiring line functions into a single conductive wiring line by implementing sequential switching. Instead of having separate dedicated lines for each antenna, the system combines all transmission paths into one shared wiring resource that is time-multiplexed across different antennas, thereby simplifying the overall PCB design and reducing wiring complexity.
Solution Approach 2:
The patent introduces switches as intermediary components that mediate between the single conductive wiring line and multiple antennas. These switching elements act as intelligent intermediaries that dynamically route signals to the appropriate antenna based on transmission requirements, simplifying the wiring architecture while maintaining flexible multi-antenna operation.
Data Source
AI summary
An example portable electronic device can include: a first antenna, a second antenna, and a third antenna; a first RFFE, a second RFFE, and a third RFFE which are configured to pre-process an RF signal; a first conductive wiring; a first switch including a (1-1)th terminal connected to the first antenna, a (1-2)th terminal connected to one end of the first conductive wiring, and a (1-3)th terminal connected to the first RFFE; a second switch including a (2-1)th terminal connected to the second antenna, a (2-2)th terminal connected to the third antenna, a (2-3)th terminal connected to the second RFFE, a (2-4)th terminal connected to the third RFFE, and a (2-5)th terminal connected to the other end of the first conductive wiring; an RFIC configured to convert RF signals inputted from the first RFFE, the second RFFE, and the third RFFE into a baseband signal, and convert the baseband signal into an RF signal so as to output the RF signal to the first RFFE; and a communication processor configured to control the first switch so as to sequentially connect the (1-3)th terminal to the (1-1)th terminal and the (1-2)th terminal when the portable electronic device operates in a first transmission mode for transmitting a sounding reference signal (SRS) to the wireless communication network by using the first RFFE, and control the second switch so as to sequentially connect the (2-1)th terminal and the (2-2)th terminal to the (2-5)th terminal while the (1-2)th terminal is connected to the (1-3)th terminal.