Antenna Panel Master Chip and RF Front End Integration
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Solution Overview
Problem
Conventional wireless receivers with mechanical adjustments for antenna positioning face high implementation costs and complexity due to the need for extensive routing of electrical signals to thousands of antennas integrated on a single printed circuit board (PCB) with hundreds of RF front end chips.
Innovation Solution
A wireless receiver design that integrates a master chip and RF front end chips on a single PCB, using a multi-layer substrate with a flat panel array of antennas, where the master chip drives parallel control buses to segments of RF front end chips, reducing the number of routing paths and enabling efficient phase shift signal delivery without mechanical parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If thousands of antennas are integrated on a single PCB with hundreds of RF front end chips, then the receiver can achieve fully electronic beamforming without mechanical adjustments, but the routing complexity and implementation cost increase significantly
Solution Approach 1:
The antenna panel is divided into multiple segments, with each segment containing a subset of antennas and associated RF front end chips. The master chip is divided into multiple control bus segments that can independently control different antenna groups. This segmentation reduces the routing complexity by organizing the thousands of connections into manageable segments rather than requiring all connections to route through a single complex path.
Solution Approach 2:
The patent utilizes the third dimension by routing control buses through multiple PCB layers. Instead of attempting to route all control signals on a single plane, the master chip drives control buses that traverse through different layers of the multi-layer PCB, allowing signals to reach different antenna segments through vertical and lateral paths. This dimensional approach significantly reduces the complexity of signal routing on any single layer.
2Measurement precision
If a ten-bit bus is used to deliver phase shift information to hundreds of RF front end chips, then accurate phase control is achieved, but the number of traces required on the PCB increases to thousands
Solution Approach 1:
The phase shift control is segmented by dividing the antenna panel into multiple segments, each controlled by a dedicated control bus segment. Instead of requiring all hundreds of RF front end chips to receive full ten-bit phase shift information simultaneously through separate traces, each control bus segment delivers phase control to its assigned antenna group, reducing the total trace requirement while maintaining precision.
Solution Approach 2:
Multiple antenna control functions are merged onto shared control bus segments. The master chip utilizes parallel control buses that can be shared among multiple RF front end chips within a segment, allowing the same control signals to serve multiple antennas through the phased array architecture rather than requiring dedicated traces to each individual chip.
3Adaptability or versatility
If multiple control and data buses are routed from the master chip to each RF front end chip, then comprehensive control capability is achieved, but the implementation cost and complexity increase
Solution Approach 1:
The control buses are designed with multi-functionality to serve multiple purposes. The same control bus infrastructure is used for both control signals and data communication between the master chip and RF front end chips. This universal bus system reduces the need for separate dedicated traces for each function, thereby lowering implementation cost while maintaining comprehensive control capability.
Solution Approach 2:
The patent employs multi-layer PCB routing where control and data buses traverse through different layers to reach various RF front end chips. This three-dimensional routing approach allows comprehensive control capability without requiring all connections to be made on the surface layer, reducing the overall complexity and cost of the routing infrastructure.
Data Source
AI summary
A wireless receiver includes an antenna panel divided into a plurality of segments, each segment having a group of antennas, each segment having a set of radio frequency (RF) front end chips. Each RF front end chip is coupled to some antennas in the group of antennas. A master chip is configured to drive in parallel a plurality of control buses. Each control bus is coupled to a respective one of the plurality of segments, where each RF front end chip in the set of RF front end chips is serially coupled to another RF front end chip in the set of RF front end chips. Each control bus carries phase shift signals and amplitude control signals from the master chip to a respective set of RF front end chips in each segment. The master chip and the plurality of segments in the antenna panel are integrated on a single printed circuit board.