>-----Original Message-----
>From: [email protected] [mailto:[email protected]]
>Sent: Tuesday, September 10, 2002 11:40 AM
>To: [email protected]
>Subject: Signal Generation
>
>
>
>Certainly someone out there has devised a simple, lost cost method of
>extending the operating frequency of their signal generator by
>using some
>type of harmonic generating device such as a mixer or step
>recovery diode
>and filters. In one application, I need to extend a 1 GHz
>generator to 2 GHz
>and in another to 25 GHz (fat chance?). Any suggestions (other
>than buying
>new generators)?
>
>Richard Woods
>Sensormatic Electronics
>Tyco International
Rich:
If you have a fixed 1 GHz generator in addition to your variable frequency 1
GHz generator, you might try using a balanced mixer. This will yield sum and
difference values of the two signals (plus other higher-order products).
It's not clean, but it might work.
Depending on what frequency accuracy and stability you need, you might try
eBay or the surplus market for something like an old Wiltron or HP-8690
sweeper.
As for coverage to 25 GHz, you might be able to find a Gigatronix 901(?)
sweeper with an external frequency doubler module. If you are really
desperate, you might even find some old HP-626 or 628 series microwave
generators. HP also had a 938/940 frequency doubler. This is really
"stone-age" stuff, but it does make vibrations up to 26 GHz or so.
Regards,
Ed
Ed Price
[email protected]
Electromagnetic Compatibility Lab
Cubic Defense Systems
San Diego, CA USA
858-505-2780 (Voice)
858-505-1583 (Fax)
Military & Avionics EMC Is Our Specialty
Shake-Bake-Shock - Metrology - Reliability Analysis
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