Dual Antenna Microwave Resection Device With Choke
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Solution Overview
Problem
Current microwave ablation devices are inadequate for procedures requiring elongated ablation regions, as they typically generate round or oblong ablation zones, making them unsuitable for tissue resection procedures that demand longer, narrower ablation volumes.
Innovation Solution
A dual antenna microwave resection and ablation device is designed with a dual-sided choke and two antennas, where the first antenna receives a first microwave frequency signal and the second antenna receives a second microwave frequency signal, configured to limit electromagnetic field propagation between them, allowing for simultaneous radiation and generating an elongated ablation region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a single antenna is used for microwave ablation, then the device structure is simple, but the ablation region is round or oblong and cannot achieve elongated ablation volumes required for resection procedures
Solution Approach 1:
The single antenna is divided into multiple antenna elements (first antenna and second antenna) arranged in a specific configuration. Each antenna element contributes to creating a portion of the elongated ablation region, allowing the device to achieve the desired elongated shape that cannot be obtained with a single antenna.
Solution Approach 2:
Multiple antenna elements are combined in a specific spatial arrangement with their electromagnetic fields merging to create a unified elongated ablation region. The coordinated operation of multiple antennas produces the extended ablation volume required for resection procedures.
2Length of moving object
If multiple antennas are used to generate elongated ablation regions, then the ablation region length increases, but electromagnetic field interference between antennas occurs
Solution Approach 1:
A choke structure is introduced as an intermediary component between the multiple antenna elements. This choke acts as a barrier to electromagnetic field propagation, preventing interference between adjacent antennas while allowing each antenna to generate its ablation contribution without disruption from neighboring elements.
Solution Approach 2:
The harmful electromagnetic field propagation between antennas is extracted or removed by introducing the choke structure. The choke selectively blocks the unwanted electromagnetic interactions between antennas while maintaining the individual antenna functions, thereby eliminating the interference problem.
3Length of stationary object
If antenna elements are positioned close together to create elongated ablation, then the device diameter is reduced, but electromagnetic field interaction between elements increases
Solution Approach 1:
The choke structure serves as an intermediary that allows compact antenna positioning while preventing electromagnetic energy loss through interference. By blocking the harmful field propagation between closely spaced antennas, the choke enables the device to maintain a compact form factor without suffering from energy loss due to antenna interaction.
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 device effectively produces ablation regions that are up to three times longer than those generated by single-antenna devices, specifically suited for resection procedures by creating a synergistic heating effect and minimizing interaction between antennas.
Implementation Method 1
The first antenna receives the first microwave frequency signal and the second antenna receives the second microwave frequency signal, both antennas configured to simultaneously radiate electromagnetic fields
Implementation Method 2
A dual antenna microwave resection and ablation device is designed with a dual-sided choke and two antennas... allowing for simultaneous radiation and generating an elongated ablation region
Implementation Method 3
The first antenna and second antenna are positioned with respect to each other and a dual-sided choke, such that the dual-sided choke limits propagation of electromagnetic fields generated by the first and second antennas
Data Source
AI summary
A system for generating microwave energy includes a microwave generator that generates first and second microwave signals, a transmission line and a dual antenna microwave device. The transmission line transmits the first and second microwave signals to the microwave device. The microwave device includes a first antenna proximal a second antenna and a dual-sided choke positioned therebetween. The first antenna receives the first microwave signal from the transmission line between a first conductor and a second conductor and the second antenna receives the second microwave signal between the second conductor and a third conductor. The dual-sided choke includes a first and a second antenna choke circuit. The first antenna choke circuit limits the propagation of electromagnetic fields generated by the first antenna toward the second antenna and the second antenna choke circuit limits the propagation of electromagnetic fields generated by the second antenna toward the first antenna.