Modular PEMF Applicator With Integrated RF Matching
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Solution Overview
Problem
Current PEMF applicators are either limited by integrated power supplies or require complex, heavy power supplies due to separate components with fixed impedance matching, leading to inefficiencies and flexibility issues in delivering therapeutic electromagnetic fields.
Innovation Solution
A two-part PEMF applicator system with a generator module that includes a power supply and signal conditioning, but not power amplification or impedance matching, and an applicator module with integrated power amplification and impedance matching, allowing for removable and reattachable components for improved flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If PEMF applicators use integrated power supplies and signal generators, then the device is compact and wearable, but the power supply becomes limited and the device lacks flexibility
Solution Approach 1:
The PEMF applicator is divided into two separate modules: a generator module containing the power supply and signal generator, and an applicator module containing the RF power amplifier and loop antenna. These modules can be removably coupled together, allowing the lightweight applicator module to be worn on the body while the generator module can be detached when not in use. This segmentation resolves the contradiction by enabling wearability through modular separation while maintaining flexibility through the removable coupling mechanism.
2Device complexity
If PEMF applicators use separate components with fixed impedance matching, then the design is simple, but radio frequency power losses increase and efficiency decreases
Solution Approach 1:
The RF power amplifier and the loop antenna are integrated into a single applicator module with matched impedance between them. This merging of components with fixed impedance matching eliminates the need for complex external impedance matching circuits while minimizing radio frequency power losses. The integration ensures efficient power transfer from the amplifier to the antenna, resolving the contradiction between design simplicity and energy efficiency.
3Adaptability or versatility
If PEMF applicators use modular design with removable components, then flexibility and efficiency are improved, but the device complexity increases
Solution Approach 1:
The device is segmented into two functional modules that connect through a simple removable coupling mechanism. The generator module contains the power supply and signal generator, while the applicator module contains the RF power amplifier and antenna. The coupling mechanism provides electrical connection between the modules without requiring complex alignment or assembly procedures. This segmentation approach enables flexibility and efficiency improvements while keeping the overall device complexity manageable through standardized interfaces.
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 lightweight, wearable, and efficient delivery of PEMF therapy with reduced radio frequency power losses and increased flexibility in field strength and frequency, enhancing therapeutic efficacy while maintaining a compact and user-friendly design.
Implementation Method 1
A two-part pulsed electromagnetic field (PEMF) apparatus includes a generator module adapted to produce electrical signals and an applicator module that includes an RF power amplifier and a loop antenna. The RF power amplifier is matched to the loop antenna with substantially fixed impedance.
Data Source
AI summary
Pulsed electromagnetic field (PEMF) apparatuses and methods of making and using them. In particular, described herein are two-part PEMF apparatuses that include a self-contained, lightweight, small, compact (e.g., in some variations, wearable) generator unit that is adapted to releasably and replaceably mate with an applicator unit. The generator unit typically includes a power source and a controller that generated PEMF waveforms to be applied, including the shape and timing of the PEMF waveforms. The applicator unit typically includes a radio frequency (RF) power amplifier, a loop antenna, and impedance matching circuitry for matching the impedances for the connection between the antenna loop and the RF power amplifier. Thus, the generator module may control the application of PEMF signals without requiring impedance matching between the separable generator unit and the applicator unit. The applicator unit can include a plurality of variable capacitors that can be used to tune the PEMF signals.