Contactless Connector Circuit for Full-Duplex Self-Interference Cancellation
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Solution Overview
Problem
Conventional contactless connectors face challenges with self-interference in high-speed two-way communications, resulting in limited data-transfer speeds and bandwidth density.
Innovation Solution
A contactless connector system utilizing an antenna system and a wireless transceiver with a transformer, wide-band phase shifter, and combiner to simultaneously transmit and receive signals, achieving self-interference cancellation through a two-stage process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If contactless connectors are designed for two-way high-speed communications, then data transfer capability is improved, but self-interference increases
Solution Approach 1:
The self-interference cancellation process is segmented into two distinct stages: a first stage using a transformer to provide initial rejection, and a second stage using a wide-band phase shifter to provide additional cancellation. This segmentation allows each stage to be optimized independently for its specific function, achieving overall high-performance cancellation while maintaining high data transfer speeds.
Solution Approach 2:
The patent introduces intermediate processing components (transformer and phase shifter) between the antenna system and the receiver that actively mediate and cancel the self-interference signal. These intermediaries process the received signal to remove artifacts from the transmission signal, enabling clear high-speed bidirectional communication.
2Reliability
If self-interference cancellation is implemented, then signal quality is improved, but device complexity increases
Solution Approach 1:
The transformer and phase shifter are integrated into a unified self-interference cancellation system that works together in sequence. The transformer combines differential signaling with isolation properties, while the phase shifter combines delay and attenuation functions, merging multiple functions into coordinated subsystems that achieve high signal quality without excessive complexity.
Solution Approach 2:
The wide-band phase shifter dynamically adjusts signal parameters (phase and amplitude) to match and cancel the self-interference artifacts. By changing parameters adaptively rather than using fixed complex circuitry, the system achieves high signal quality with controlled complexity.
3Productivity
If bandwidth density is increased, then communication efficiency is improved, but susceptibility to interference increases
Solution Approach 1:
The system applies preliminary anti-action by preemptively canceling self-interference through the two-stage process before the interference can degrade the high-bandwidth signal. The transformer and phase shifter are configured to counteract the expected self-interference artifacts, enabling the system to operate at high bandwidth density without suffering from increased interference susceptibility.
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 system enables high-bandwidth concurrent bidirectional communications at data rates of at least 2 Gbps over a distance of up to 50 mm, with improved signal-to-noise ratio and increased bandwidth density.
Implementation Method 1
The transformer has a primary coil with a center tap to which the transmission signal is coupled and a first end that is coupled to the antenna system
Implementation Method 2
The wide-band phase shifter comprises a wide-band variable-delay line that introduces a time delay specified by a first control signal
Implementation Method 3
an output of the secondary coil is coupled to a first input of the combiner, an output of the wide-band phase shifter is coupled to a second input of a combiner, and an output of the combiner provides a self-interference-canceled version of the received signal
Data Source
AI summary
Provided is a contactless connector that includes an antenna system and a wireless transceiver coupled to the antenna system and configured to simultaneously transmit a transmission signal and receive a received signal through the antenna system. The wireless transceiver includes a transformer, a wide-band phase shifter and a combiner. The transformer has a primary coil with a center tap to which the transmission signal is coupled and a first end that is coupled to the antenna system. The transmission signal also is coupled to an input of the wide-band phase shifter. The transformer also has a secondary coil, an output of the secondary coil is coupled to a first input of the combiner, an output of the wide-band phase shifter is coupled to a second input of a combiner, and an output of the combiner provides a self-interference-canceled version of the received signal.