Building a WiFi Amp (2.4 - 2.47 Ghz Amp)

anrkey · 03-21-2004

I would like to build a Wi-Fi Amp in the 2.4 - 2.47Ghz range and about 1 Watt (more would be cool :P). Is there any1 with the know how or a diagram for one of these. Any help would be gr8. Thanks

Thorn · 03-21-2004

Quote:

Originally posted by anrkey
I would like to build a Wi-Fi Amp in the 2.4 - 2.47Ghz range and about 1 Watt (more would be cool :P). Is there any1 with the know how or a diagram for one of these. Any help would be gr8. Thanks

A couple of things:

1) More than 1 Watt is illegal under FCC regulations, unless you are a Ham. (Of course, if you're a Ham, you probably know the limits already.)

2) Building microwave amps requires precision (+/- thousands of an inch) PCB techniques and components. It's difficult, to say the least.

Because of these things it is usually better to purchase an amp. Yes, they are expensive, but they are costly for a reason.

By the way, please drop the "any1" and "gr8" junk. Proper English is the accepted language here.

Thorn · 03-21-2004

OK, I just looked at your profile and realized you are in South Africa, so obviously the FCC regulations don't affect you. However, you might want to check the RF regulations for your country. Many countries are very restrictive about the ISM band.

renderman · 03-22-2004

I looked into this a while ago myself.

Thorn is quite right that the tolerences are very tight requiring some precise (read: expensive) pcb work. so unless you have access to this equipment on a regular basis at work or school, it's going to cost you alot more than a pre-fab AMP. At the very least you'll know that it si going to work.

Given your location and shipping costs, it might be cheaper to build one. Price it out and weight the costs.

The other option is to keep an eye open on ebay and around here for stuff for sale. You can get some pretty decent deals around here.

anrkey · 03-23-2004

I still have not found out what I need to know. Does anyone have a design for an AMP? Anything up to a 500mWatt will do just fine. I was joking about the 10Watt Amp. I dont think I will need more than a 200mWatt anyway.

Thanks for your remarks.

wrzwaldo · 03-23-2004

Quote:

Originally posted by anrkey
I still have not found out what I need to know. Does anyone have a design for an AMP? Anything up to a 500mWatt will do just fine. I was joking about the 10Watt Amp. I dont think I will need more than a 200mWatt anyway.

Thanks for your remarks.

Did you attempt any kind of SEARCH?

anrkey · 03-23-2004

Yes I did

wrzwaldo · 03-23-2004

And what did you find?

Gonarat · 03-23-2004

I would try building an antenna before going with an amp. A good antenna will give you quite a bit of gain (and thus signal) without the need of any extra power. For the cost of an amp (build it yourself or manufactured) you can build several antennas which can be used as needed. There are plenty of wifi antenna designs out on the internet (Google is your friend), so you should find something that meets your needs.

If you really need an amp to do the job, then I agree that purchasing is better unless you have real good skills and real good equipment -- building amps at 2.4 Ghz can be a real challenge -- antennas, on the other hand are fairly easy to build.

Bill

anrkey · 07-01-2004

Please only reply if you have an answer for my question. All I would like to know is, are there any people that know of a good amp design. I am not a retard

I know how do build these kind of things... All I need is a design. I need to do a 50 KM distance. Thank you anyway for the replies so far though.

wrzwaldo · 07-01-2004

Been three months. Don't look like anyone knows. Except you have already been given a couple answers. I found three the last time I searched with google. No I will not post the links, go find the your damn self.

nimrod35c · 08-30-2004

Yes, I am a machinest and would like to build my own amp, precision is my game and I want to build this amp as well, pluss I have several years in electronics..

kleptophobiac · 08-31-2004

Well, we built one that put out about 250mW of output power. It required several major modules. It had to have switching circuitry to detect RX and TX and to direct power. It had to have a power regulator module to provide power to other modules. It had a RX amp and a TX amp. I'll see if we still have it (we blew up the output transistors (two for RX, two for TX) trying to go for 700 mW)... and I don't know if it has been taken apart yet or not.

03-21-2004	#1 (permalink)
anrkey Registered Member Join Date: Mar 2004 Location: George, South Africa Posts: 4	Building a WiFi Amp (2.4 - 2.47 Ghz Amp) I would like to build a Wi-Fi Amp in the 2.4 - 2.47Ghz range and about 1 Watt (more would be cool :P). Is there any1 with the know how or a diagram for one of these. Any help would be gr8. Thanks __________________ It's just an R key!

03-21-2004	#3 (permalink)
Thorn Did you do the math? Join Date: Apr 2002 Location: Villa Straylight Posts: 10,359	OK, I just looked at your profile and realized you are in South Africa, so obviously the FCC regulations don't affect you. However, you might want to check the RF regulations for your country. Many countries are very restrictive about the ISM band. __________________ Thorn "Read Altas Shrugged. Compare it to today. Repeat as necessary"

03-22-2004	#4 (permalink)
renderman Drunken Stumbler Join Date: Jun 2002 Location: Anywhere but Utah Posts: 1,862	I looked into this a while ago myself. Thorn is quite right that the tolerences are very tight requiring some precise (read: expensive) pcb work. so unless you have access to this equipment on a regular basis at work or school, it's going to cost you alot more than a pre-fab AMP. At the very least you'll know that it si going to work. Given your location and shipping costs, it might be cheaper to build one. Price it out and weight the costs. The other option is to keep an eye open on ebay and around here for stuff for sale. You can get some pretty decent deals around here. __________________ Never drink anything larger than your head! Scaramental Wine Taster for the Church Of WiFi Buy our books! "I reject your reality, and substitute my own!" – Adam Savage CoWF WPA Hash Tables

03-23-2004	#5 (permalink)
anrkey Registered Member Join Date: Mar 2004 Location: George, South Africa Posts: 4	OK... So now what :P I still have not found out what I need to know. Does anyone have a design for an AMP? Anything up to a 500mWatt will do just fine. I was joking about the 10Watt Amp. I dont think I will need more than a 200mWatt anyway. Thanks for your remarks. __________________ It's just an R key!

03-23-2004	#7 (permalink)
anrkey Registered Member Join Date: Mar 2004 Location: George, South Africa Posts: 4	Yes... Yes I did __________________ It's just an R key!

03-23-2004	#8 (permalink)
wrzwaldo I amuse you? Join Date: Dec 2003 Posts: 9,147	And what did you find?

03-23-2004	#9 (permalink)
Gonarat Use the Search, Luke... Join Date: Apr 2002 Location: Louisville, KY Posts: 29	Try an Antenna first I would try building an antenna before going with an amp. A good antenna will give you quite a bit of gain (and thus signal) without the need of any extra power. For the cost of an amp (build it yourself or manufactured) you can build several antennas which can be used as needed. There are plenty of wifi antenna designs out on the internet (Google is your friend), so you should find something that meets your needs. If you really need an amp to do the job, then I agree that purchasing is better unless you have real good skills and real good equipment -- building amps at 2.4 Ghz can be a real challenge -- antennas, on the other hand are fairly easy to build. Bill

07-01-2004	#10 (permalink)
anrkey Registered Member Join Date: Mar 2004 Location: George, South Africa Posts: 4	Please only reply if you have an answer.... Please only reply if you have an answer for my question. All I would like to know is, are there any people that know of a good amp design. I am not a retard I know how do build these kind of things... All I need is a design. I need to do a 50 KM distance. Thank you anyway for the replies so far though. __________________ It's just an R key!

07-01-2004	#11 (permalink)
wrzwaldo I amuse you? Join Date: Dec 2003 Posts: 9,147	Been three months. Don't look like anyone knows. Except you have already been given a couple answers. I found three the last time I searched with google. No I will not post the links, go find the your damn self.

08-30-2004	#12 (permalink)
nimrod35c Registered Member Join Date: Aug 2004 Posts: 1	Yes, I am a machinest and would like to build my own amp, precision is my game and I want to build this amp as well, pluss I have several years in electronics..

08-31-2004	#13 (permalink)
kleptophobiac Registered Member Join Date: Sep 2002 Posts: 310	Well, we built one that put out about 250mW of output power. It required several major modules. It had to have switching circuitry to detect RX and TX and to direct power. It had to have a power regulator module to provide power to other modules. It had a RX amp and a TX amp. I'll see if we still have it (we blew up the output transistors (two for RX, two for TX) trying to go for 700 mW)... and I don't know if it has been taken apart yet or not.

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