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UWB radar system (for medical imaging) in MATLAB simulink

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vsnr

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Hi all,

I am working on Ultra wideband radar for cardiac imaging. I want to design UWB radar system in Simulink i.e Signal transmission (sequence of pulses can be M-sequence), Signal propagation (model human heart as a sequence of dielectric layer skin-fat-muscle-cartilage-lung), and i need the receive signal coming all the way from heart to skin.
I am new to simulink, Can anyone please suggest me the best way I can do this? i would be very grateful for any suggestions.

Thank you,
Vsnr
 

Did you see articles which recommend this? It sounds as though you plan to send microwaves into human tissue (or to simulate it). Do the articles say it is possible to distinguish skin-fat-muscle-cartilage-lung?

Ultrasound is commonly used to 'see' into human tissue, in a manner similar to radar or sonar.
 

Hi BradtheRad,

Yes, it supposed to differentiate every specific layer as they differ in dielectric properties. There are many articles and also huge research going on medical imaging using UWB radar these days.One of the article discussing the UWB radar in medical is provided in below link.
https://e-reports-ext.llnl.gov/pdf/325992.pdf.

Thank you.
 

And yet the images are.... bleh.

For effective cardiac imaging you would need millimeter resolution, so you're looking at bandwidth of >50GHz.

If you want to try something, you need to start with a phantom of your anatomy with appropriate geometry and material properties. You can likely find this in existing literature. For solving the fields I don't think simulink is appropriate. You need a solver like HFSS or CST.
 

Thank you for your reply.
I am working in UWB frequency range of 3.1 GHz to 10.6 GHz.For electromagnetic simulation part, i am using Remcom XFdtd. My idea is to use Simulink for designing UWB signal generation and antenna part and then using that data i can proceed in XFdtd. Does it work? Is there any other best way?
Please suggest me.
 

you may need a UWB filter to follow the antenna? My degree thesis was the design of a sw that automated the design of that filter and I explained it's functionallity. Maybe is of your interest.

https://ddd.uab.cat/record/131445?ln=es

It is written in catalan. Hope that a translator will do the job.

BR
 

FDTD simulators are likely the ideal solution for the EM simulation portion of the problem, so that's good. So is simulink only for handling the signal chains to and from the antenna ports? That should be relatively trivial, I'm not sure what you need help with?
 

a signal in the 3.1 GHz to 10.6 GHz frequency range does not have a prayer of penetrating the rib cage and flesh to the depth of the heart. You might want to rethink your approach, maybe use a sub 1 GHz impulse? Otherwise you will just be seeing the skin of the chest moving, and the signal from the heart itself will be so small you will not see it.
 
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