What is the smaller receiver one can make for 300KHz?

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SignalBlocking

Joined May 2, 2021
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BobTPH

Joined Jun 5, 2013
3,308
A loopstick antenna is typically for low frequencies. They respond to the varying magnetic field instead if the electric field and are not sensitive to wavelength the way other antennae are.

Bob
 

Thread Starter

SignalBlocking

Joined May 2, 2021
23
I suggest that you consult the datasheet.

The tuning inductor is often used as the antenna. You can attach an external antenna if desired.

Edit:
View attachment 238112
Above is a photo of a test fixture I made.

View attachment 238114
What does your device do? Is it like a crystal radio?

A loopstick antenna is typically for low frequencies. They respond to the varying magnetic field instead if the electric field and are not sensitive to wavelength the way other antennae are.

Bob
Do you think something like that could be miniaturized to put in an implant for 300 KHz?
 

BobTPH

Joined Jun 5, 2013
3,308
[QUOTE="SignalBlocking]
Do you think something like that could be miniaturized to put in an implant for 300 KHz?
[/QUOTE]

My bad. I should have noticed who posted this before answering.

Bob
 
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andrewmm

Joined Feb 25, 2011
1,466
If I can may be draw a line under this,

To answer the original question, how small can a 300 Khz receiver be made,
As I think is covered in the other forum post,

Given enough resources, a chip could be made , hat would be able to receive,
and indeed one could be made that can transmit.

As for antenna,
yes if its electrically the right length, then that gives maximum range, be that receive or transmit,
But, as has been said, any conductor that has a changing signal on it radiates,
you just need more transmit power / receive gain.

About power,
even if one did make say a receiver that was minuscular,
then how do you power it ?
things like cochlea implants have large external power couplings for a reason,

Then, I think your talking about an implant in the head,
what would that do ?
if it was to say simulate the brain so that it senses something,
the brain needs about 20 watts of power,
to make an impact you are going to need some wide ranging connections to the brain , and some power.

If you look at cochlea implants,
the scar left on is substantial, and that's with an external power system,
assuming you want to keep the power inside the head, then that's going to be quiet big,

I hope this helps you

there were suggestions in the previous post as to what you could do to investigate .

I wish you well.
 

anniel747

Joined Oct 18, 2020
1,043
Given enough resources, a chip could be made , hat would be able to receive,
and indeed one could be made that can transmit.

As for antenna,
yes if its electrically the right length, then that gives maximum range, be that receive or transmit,
But, as has been said, any conductor that has a changing signal on it radiates,
you just need more transmit power / receive gain.

About power,
even if one did make say a receiver that was minuscular,
then how do you power it ?
Look up RFID.
 

Thread Starter

SignalBlocking

Joined May 2, 2021
23
My bad. I should have noticed who posted this before answering.

Bob
I didn't know you were intimidated with my intelligence that much.

Why do you want to reinvent the wheel? Implants are common now and cost next to nothing.
I don't want to reinvent the wheel, I want to know if it's feasible or not?

Why 300 KHz ?

Are you back to the question about you have an illegal implant in your head ?

https://forum.allaboutcircuits.com/...-frequency-of-an-implant.178860/#post-1627446
The reason for 300KHz is in this post: https://forum.allaboutcircuits.com/threads/what-is-the-feminist-frequency.178814/

Didn't realize it was the same guy.
What difference would it make?

If I can may be draw a line under this,

To answer the original question, how small can a 300 Khz receiver be made,
As I think is covered in the other forum post,

Given enough resources, a chip could be made , hat would be able to receive,
and indeed one could be made that can transmit.

As for antenna,
yes if its electrically the right length, then that gives maximum range, be that receive or transmit,
But, as has been said, any conductor that has a changing signal on it radiates,
you just need more transmit power / receive gain.

About power,
even if one did make say a receiver that was minuscular,
then how do you power it ?
things like cochlea implants have large external power couplings for a reason,

Then, I think your talking about an implant in the head,
what would that do ?
if it was to say simulate the brain so that it senses something,
the brain needs about 20 watts of power,
to make an impact you are going to need some wide ranging connections to the brain , and some power.

If you look at cochlea implants,
the scar left on is substantial, and that's with an external power system,
assuming you want to keep the power inside the head, then that's going to be quiet big,

I hope this helps you

there were suggestions in the previous post as to what you could do to investigate .

I wish you well.
Thanks for your informative post. I suspect the implant could be field powered.

Look up RFID.
Okay.
 

anniel747

Joined Oct 18, 2020
1,043
I don't want to reinvent the wheel, I want to know if it's feasible or not?
I is used daily worldwide and you can buy a 10 pack for $20.


What 300KHz has to do with 325MHz? Is there a secret hidden formula?

What difference would it make?
Not the same answers would have been provided.
 

Thread Starter

SignalBlocking

Joined May 2, 2021
23
I is used daily worldwide and you can buy a 10 pack for $20.

What 300KHz has to do with 325MHz? Is there a secret hidden formula?

Not the same answers would have been provided.
Maybe I'm wrong in assuming it was MHz, maybe it is KHz, because Q in that word, seems to indicate q branch and I can't get to see q branch at 325MHz, I can only see q branch at 300KHz.
 
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