Help - Design a Network Analyzer

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johnseven

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RF people,

I am trying to design a Network Analyzer.

Questions :
What detectors?
Analog Devices log amps ?
What signal source?
Use DDS (direct digital synthesis) ?
Use oscilloscope for display?
or computer display?
Or provision for both?
Software ?

Thank you for ANY suggestions


johnseven
 

I remember reading the article about the Hagtronics in QEX. It is a very clever setup and I think it is the way you should go.
 


look at circuit caller 150 there is a full design up to 1 gh

look at circuit caller 150 there is a full design up to 1 ghz

bobi
 

circuit caller ?

Bobcat1, can you explain me what is circuit caller ?

Thanks

Mandi
 

hi

i hope my experience in designing a spectrum analayzer can help u

1.For detector u can use a digital filter with dsp and measuring its power after filter
2.For log amp u can use ad8307 that have 80dB dynamic range and DC-500MHz Bandwidth
3.For signal source u can use a DDS or Hybrid PLL-DDS frequency synthesyzer
4.And finally if u use computer for display u can interface with ur DSP from computer easily.

Bests
 

Technical help from members

Bobcat1, Gakusei and Circuit_Seller.

I'm reading and following your many links/suggestions.
Very useful, indeed.
The first quick'n dirty experiment "to get a feel" for the problems, using
Analog Devices's AD8302 works. Good chip with mag and phase detectors,
but with only 60 dB range.
I'll proceed.
Thanks again,

J7
 

Hi johnseven

I read AD8302 datasheet, but i did not find anythings about its performance below 100MHz.
Do you have expriences in working with it below 100MHz? is it still have good performance?

Regards
 

Circuit_seller said:
Hi johnseven

I read AD8302 datasheet, but i did not find anythings about its performance below 100MHz.
Do you have expriences in working with it below 100MHz? is it still have good performance?

Regards
Click to expand...

Soryy for the delay. I was traveling ...

Yes. It works well in those frequencies too. I tried it as low as 5 MHz and it performed as well as at 100MHz.
 

there is design at cypress using the PSOC chip .. it was an awarded design .
i got all the parts and never put it together .But is a nice design
 

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