Two-part pulsed electromagnetic field applicator for application of therapeutic energy
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.
1. A modular apparatus for applying pulsed electromagnetic field (PEMF) energy to a subject, the apparatus comprising:
a generator unit including a signal generator configured to generate a PEMF waveform and a first connector;
an applicator unit including
a second connector adapted to mate with the first connector,
a radio frequency (RF) power amplifier adapted to receive waveform information from the generator unit though the second connector and generate PEMF signals therefrom,
a loop antenna connected to the RF power amplifier and adapted to deliver the PEMF signals to the subject wearing the applicator unit,
impedance matching circuitry configured to match the impedance between the RF power amplifier and the loop antenna;
a generator housing enclosing the signal generator; and
an applicator housing enclosing the RF power amplifier,
wherein the generator unit is configured to releasably connect to the applicator unit to drive transmission of PEMF signals from the applicator unit based on the PEMF waveforms, further wherein the generator housing and the applicator housing are adapted to engage with each other to releasably connect the generator unit to the applicator unit.
2. The apparatus of claim 1 , wherein the generator unit comprises a power source.
3. The apparatus of claim 1 , wherein the signal generator comprises a controller including the signal generator.
4. The apparatus of claim 1 , further comprising a memory within the generator unit adapted to store information about one or more of applied stimulation, operational status, or error codes.
5. The apparatus of claim 1 , wherein the generator unit does not include a separate RF power amplifier.
6. The apparatus of claim 1 , further comprising a couple/uncouple control configured to engage or disengage the generator unit from the applicator unit.
7. The apparatus of claim 1 , further comprising a wireless communications unit in the generator unit.
8. The apparatus of claim 1 , the impedance matching circuitry comprising one or more variable capacitors.
9. A modular apparatus for applying pulsed electromagnetic field (PEMF) energy to a subject, the apparatus comprising:
a generator unit including a signal generator configured to generate a PEMF waveform and a first connector; and
an applicator unit including
a second connector adapted to mate with the first connector,
a radio frequency (RF) power amplifier adapted to receive waveform information from the generator unit though the second connector and generate PEMF signals therefrom,
a loop antenna connected to the RF power amplifier and adapted to deliver the PEMF signals to the subject wearing the applicator unit,
impedance matching circuitry configured to match the impedance between the RF power amplifier and the loop antenna;
wherein the generator unit is configured to releasably connect to the applicator unit to drive transmission of PEMF signals from the applicator unit based on the PEMF waveforms,
further wherein the first connector comprises a first magnetic structure on the generator unit and the second connector comprises a second magnetic structure on the applicator unit configured to complementarily engage with the first magnetic structure.
10. A modular apparatus for applying pulsed electromagnetic field (PEMF) energy to a subject, the apparatus comprising:
a self-contained, lightweight generator unit including a signal generator configured to generate a PEMF waveform and a first connector, wherein the generator unit does not include a separate radio frequency (RF) power amplifier; and
an applicator unit, wherein the generator unit is adapted to releasably connect with the applicator unit when the applicator unit is worn by the subject, the applicator unit including:
a second connector adapted to mate with the first connector,
a radio frequency (RF) power amplifier adapted to receive waveform information from the generator unit though the second connector and to generate PEMF signals therefrom,
a loop antenna connected to the RF power amplifier and adapted to deliver the PEMF signals to the subject wearing the applicator unit,
impedance matching circuitry configured to match the impedance between the RF power amplifier and the loop antenna;
wherein the generator unit is configured to power the applicator unit to drive transmission of PEMF signals from the applicator unit based on the PEMF waveforms,
further comprising a generator housing enclosing the signal generator and an applicator housing enclosing the RF power amplifier, wherein the generator housing and the applicator housing are adapted to engage with each other to releasably connect the generator unit to the applicator unit.
11. The apparatus of claim 10 , wherein the generator unit comprises a power source.
12. The apparatus of claim 10 , wherein the signal generator comprises a controller including the signal generator.
13. The apparatus of claim 10 , further comprising a memory within the generator unit adapted to store information about one or more of applied stimulation, operational status, or error codes.
14. The apparatus of claim 10 , further comprising a couple/uncouple control configured to engage or disengage the generator unit from the applicator unit.
15. The apparatus of claim 10 , further comprising a wireless communications unit in the generator unit.
16. The apparatus of claim 10 , wherein the impedance matching circuitry comprises one or more variable capacitors.
17. A modular apparatus for applying pulsed electromagnetic field (PEMF) energy to a subject, the apparatus comprising:
a self-contained, lightweight generator unit including a signal generator configured to generate a PEMF waveform and a first connector, wherein the generator unit does not include a separate radio frequency (RF) power amplifier; and
an applicator unit, wherein the generator unit is adapted to releasably connect with the applicator unit when the applicator unit is worn by the subject, the applicator unit including:
a second connector adapted to mate with the first connector,
a radio frequency (RF) power amplifier adapted to receive waveform information from the generator unit though the second connector and to generate PEMF signals therefrom,
a loop antenna connected to the RF power amplifier and adapted to deliver the PEMF signals to the subject wearing the applicator unit,
impedance matching circuitry configured to match the impedance between the RF power amplifier and the loop antenna;
wherein the generator unit is configured to power the applicator unit to drive transmission of PEMF signals from the applicator unit based on the PEMF waveforms,
wherein the first connector comprises a first magnetic structure on the generator unit and wherein the second connector comprises a second magnetic structure on the applicator unit configured to complementarily engage with the first magnetic structure.