Microwave Radio Project

[Django Fawkes]

I am looking to recreate a microwave radio device from US Patent No. 4,877,027 of which here is a link:

http://www.google.com/patents/US4877027

To save reading all of that, refer to Fig 1 which provides an overview flowchart of the devices functionality and a succint summary is provided in the Apparatus subsection of the Description which in other more detailed words describes of how the microwave generator is model no. PH40K of Applied Microwave Laboratories, which acts as the signal source. The cable connecting the microwave generator and antenna is RG8 Coaxial Cable available from Belden Industries, the antenna maybe a standard parabolic antenna and finalizes by saying the the fm modulator has to be specially built to include the spacing runction which is obtained by a frequency generator built into a "srandard" fm generator. (I assume they meant "standard").

Basically, I have plans to create a homemade version of this device, however, I need as much input as possible before I proceed.

Firstly, I need to gain some clarification as to the microwave generator as it appears that either Applied MIcrowave Labs is no longer available or if they go by another name, no other vendor seems to have that model number with the appropriate model.
So I am now at the predicament where I have to find another microwave generator without paying stupidly expensive prices. The patent author specifies that the microwave generator should operate at the safe 1,000 megahertz. I would like the oscillator/microwave generator to be in the "safety" zone, however, realistically, I am willing to accept anything between 100mhz to 10,000 mhz.

So getting to the point: Does anyone know what would be the best place to find an ideal solution to the generator, I have my eye on a few on ebay such as this one, which is dirt cheap despite being over the safety limit of 1000mhz:

link

But I thought I should ask first as I do not want to be buying the wrong thing and wasting time and money as I am not very savvy with physics and truly do not fully understand the patent. On which note, is the 1000 mhz safety limit for a good reason or can it be stretched for the slack of us?

Lastly, I also would like to ask as to whether a software defined radio could act as a way to both modulate the frequency and generate the pulses and therefore I could use my computer to send information to it and use a USB mic to speak into it and even if I cannot control the pulse, is there any way to have the sound output of my computer be outputted in this microwave device. I'm thinking Arduino if not Software Defined Radio?

Thanks in advance.

 

[(*steve*)]

I might be old fashioned, but I wouldn't be deliberately beaming radiation at my head.

I would have thought the power would be a safety issue more than frequency, but I'm no expert in this area.

 

[CDRIVE]

As Steve stated, output power is more of a safety issue than freq. The FCC limits experimental transmissions on none licensed transmitters to no greater than 1mW into a 50 Ohm test load. This is more of an insurance against interference to other services than it is about your safety though. Most experimenters don't have the instruments to accurately measure this anyway.

 

[davenn]

ohhh my gosh

the circuit originator actually wants to beam microwaves at some one's head!!!!!

Unbelieveably stupid --- seriously!! he should have been put against the wall rather than being granted a patent

Django .... PLEASE, PLEASE dont follow up on this project
there's still lots of debate as to if and how much damage can be done by RF to the human body. I and a lot of others who have and or do work with RF at microwave frequencies are very careful about exposure limits.

So getting to the point: Does anyone know what would be the best place to find an ideal solution to the generator, I have my eye on a few on ebay such as this one, which is dirt cheap despite being over the safety limit of 1000mhz:

Django .... as you go up in frequency it becomes less safe, dont forget ( maybe you dont know) a microwave oven uses 2.4 GHz (2400MHz) to cook food!


cheers
Dave

 

[CDRIVE]

OMG! I didn't click that link till you posted this! Eeeek!

 

[Django Fawkes]

I might be old fashioned, but I wouldn't be deliberately beaming radiation at my head.

Neither would I, I am using the device's concept for an entirely different reason.

I would have thought the power would be a safety issue more than frequency, but I'm no expert in this area.

Ok, thanks I'll look into that.

 

[Django Fawkes]

As Steve stated, output power is more of a safety issue than freq. The FCC limits experimental transmissions on none licensed transmitters to no greater than 1mW into a 50 Ohm test load. This is more of an insurance against interference to other services than it is about your safety though. Most experimenters don't have the instruments to accurately measure this anyway.

Yeah, I was going to look into the legal side of things once I had acquired a solid workable plan. Thanks for letting me know.

 

[Django Fawkes]

ohhh my gosh

the circuit originator actually wants to beam microwaves at some one's head!!!!!

Unbelieveably stupid --- seriously!! he should have been put against the wall rather than being granted a patent

In fact, this device was borne out of a genuinely true to life experiment conducted by the CIA called Project MKULTRA. And who's gonna "put the cia up against a wall".

Django .... PLEASE, PLEASE dont follow up on this project
there's still lots of debate as to if and how much damage can be done by RF to the human body. I and a lot of others who have and or do work with RF at microwave frequencies are very careful about exposure limits.

I am more than aware of the dangers such as cancer and seizures, however, despite my original post made it look like I was a bored teen trying to play Frankenstein, I am uber safety conscious and was only asking you guys to generate a conceptually workable device without venturing into creating it, upon so doing, I would then of course look into many areas of both law and safety and contact legal advisor about my workings.

Django .... as you go up in frequency it becomes less safe, dont forget ( maybe you dont know) a microwave oven uses 2.4 GHz (2400MHz) to cook food!


cheers
Dave

I already know and have done for a long time, like I said, I am trying to build a virtual concept, NOT a real life model. And furthermore, please do not think I was going to use this device to beam at somebody's head, I was learning in fact how to make an utterly different device which employed the same method of operation that is NOT used against living beings.

 

[Django Fawkes]

OMG! I didn't click that link till you posted this! Eeeek!

It wasn't my intention to use it in this way, however, here is a youtube video a "top scientist" that does: