MCR-WPT Printed Spiral Coils

MCR-WPT Printed Spiral Coils Prototype Circuit

Here we give a brief overview of the results and Design methodology used for the Magnetically Coupled Resonant Wireless Power Transmission (MCR-WPT) Printed Spiral Coils (PSC) designed for cellphones.

Below is a list of all the topics we cover in this page. Go ahead and click on any of these links, and you’ll be taken to that specific section.

If you would like to know more background information about the MCR-WPT Coils and why we designed them, click on button on the right to find out more.

Design Prototype

Play Video

Video showing an early test of the MCR-WPT coil prototypes.

Experimental setup for MCR-WPT-coil efficiency testing at different distances

Simulation vs Measurement Results (5×2.52In double layer FR4 design for cellphones)

Separation Distance Harmonic Balance Output Power Function Generator Output Power

0.5 inch

0.064 Watts

0.0576 Watts

1.0 inch

0.226 Watts

0.2401 Watts

1.5 inch

0.337 Watts

0.156 Watts

Design Layout in momentum

Double layer MCR-WPT coils layout design example

There are many things to consider when designing the MCR-WPT coils for high efficiency at a desired Self-Resonant Frequency (SRF). These considerations include the effects of changing the coil parameters such as wire width, wire spacing, coil diameter, etc.

For a brief overview of the effects of parameter changes on efficiency and the SRF, or for the final design parameter values, click on the respective button to find out more.

Double layer MCR-WPT Coils design example 3D model in Momentum

NOTE: The above 2D image of the 3D model does not explain much, and any additional images may make this section bloated. So a short 8 minute video is provided that shows the design, 3D model and simulation of the coils in Momentum starting at the 2:40 mark. Click the button below to go to the video.

Design Layout in empro

Double layer MCR-WPT Coils design example 3D model in EMPro

NOTE: As stated in the previous section, a 2D image of the 3D model just does not do it justice. So a short 5 minute video is provided to show the design modifications and simulation setup of the MCR-WPT coils in EMPro. Click the button below to go to the video.

mcr-wpt-psc Design Process

MCR-WPT-PSC Design Methodology flow chart

Step-By-Step MCR-WPT-PSC Design Flow Walkthrough Videos

A 2 part step-by-step video walk-through was made to demonstate the design flow using one of the final designs.
The videos are provided below for your convenience.

Play Video

Step-by-step video walkthrough of the design process for the final design part 1.

Play Video

Step-by-step video walkthrough of the design process for the final design part 2.