Waveguide for Intra-Package RF Signal Transfer
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Solution Overview
Problem
In multi-chip integrated circuit (IC) packages, existing communication methods rely on complex networks of conductive lines, which can be inefficient and limit the ability to effectively transfer radio frequency (RF) signals between chips.
Innovation Solution
A waveguide structure is introduced, comprising a rectangular-metal waveguide with a dielectric layer between top and bottom metal layers, allowing RF electromagnetic waves to propagate efficiently between chips, with probes or antennas facilitating communication and impedance matching circuits optimizing power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex network of conductive lines is used for communication between chips, then data transfer can be achieved, but the structure becomes complicated and RF signal transfer efficiency deteriorates
Solution Approach 1:
The patent replaces the traditional conductive line-based communication system with a waveguide-based electromagnetic field system. The waveguide structure (comprising conductive walls forming a enclosed path) guides RF electromagnetic waves between chips, substituting the mechanical/electrical conductive network with an electromagnetic field-based transmission medium that is better suited for RF signals.
Solution Approach 2:
The waveguide acts as an intermediary structure between transmitting and receiving antennas on different chips. This waveguide medium facilitates efficient RF energy transfer by confining and directing electromagnetic waves through its conductive walls, serving as a dedicated transmission channel that simplifies the overall communication architecture.
2Reliability
If traditional conductive lines are used for RF signal transfer, then connection can be established, but power transfer efficiency deteriorates
Solution Approach 1:
The patent replaces inefficient conductive line-based power transfer with a waveguide-based electromagnetic field system. The waveguide structure confines RF electromagnetic waves, enabling efficient wireless-like power transfer between chips without the resistive losses inherent in traditional conductive networks.
3Ease of manufacture
If probes are positioned without optimization, then simple alignment is achieved, but electric field alignment and power transfer efficiency deteriorate
Solution Approach 1:
The patent optimizes the positioning parameters of probes (antennas) within the waveguide structure to achieve maximum electric field alignment. By carefully selecting probe positions, orientations, and dimensions, the system maximizes coupling between transmitting and receiving elements, thereby improving power transfer efficiency while maintaining manufacturability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The waveguide enables efficient RF signal communication between chips within the IC package, reducing the need for complex conductive networks and enhancing power transfer by positioning probes for maximum electric field alignment and using impedance matching for improved power efficiency.
Implementation Method 1
allowing RF electromagnetic waves to propagate efficiently between chips
Implementation Method 2
a dielectric layer between top and bottom metal layers
Data Source
AI summary
An integrated chip (IC) package may include a waveguide that comprises a cavity, a first chip and a second chip. The first chip includes a first radio frequency (RF) transceiver that may be coupled to a first probe that extends into the cavity of the waveguide and/or a first antenna that is positioned over a first opening in the waveguide. The second chip includes a second RF transceiver that may be coupled to a second probe that extends into the cavity of the waveguide and/or a second antenna that is positioned over a second opening in the waveguide. The first and second chips may be configured to communicate with one another exclusively by the first and second RF transceivers transmitting and receiving RF signals through the cavity of the waveguide via the first and second probes and/or the first and second antennas.