I am looking for a circuit which can generate an emf oscillating at frequency of 2.5Ghz.
My setup is in such a way that, I am passing particles (negligible mass) from a tunnel and want an emf perpendicular to the flow. The emf should have frequency of 2.5Ghz
Adding to the colleagues above there are many structures of the such oscillators where they can be built from discrete elements using one transistor such as colpitts oscillator or integrated oscillators with controlling voltage to tune them.
I would propose that you use an integrated voltage controlled oscillator at 2.5 Ghz. You can search the web for data sheet. If the output power is not sufficient to drive your load then you can use a class E or F amplifier tuned at the 2.5GHz .
If you want crystal stability you can use an frequency synthesizer FS with crystal reference as George hinted.
Best wishes
Hi Saurav L. Chaudhari ,
it depends on the field strength your set-up needs.
For a few V/m, a quarz oscillator (e.g. 25 MHz), a PLL circuit capable of an output frequency of 2.5 GHz, and an amplifier would do.
For high field strength, I think the easiest way is to use a magnetron, fed by a power supply as those in microwave ovens. In this case, however, you have to take measures to limit the radiation to the inside of your set-up because powerful microwave radiation is harmful to biological systems. E.g. your eyes could be incurably damaged before you even feel anything.
In any case, if you need a simple field geometry you have to absorb the radiation after passing the particles in order to avoid reflection.
Dear Saurav,
Can you show a schematic of the set-up you areworking on, an which type of tunneling particles? As, Dr. Jorge said, the oscillator design strongly relies on the application specifications of frequency and field strength
Adding to the colleagues above there are many structures of the such oscillators where they can be built from discrete elements using one transistor such as colpitts oscillator or integrated oscillators with controlling voltage to tune them.
I would propose that you use an integrated voltage controlled oscillator at 2.5 Ghz. You can search the web for data sheet. If the output power is not sufficient to drive your load then you can use a class E or F amplifier tuned at the 2.5GHz .
If you want crystal stability you can use an frequency synthesizer FS with crystal reference as George hinted.
Best wishes
There are several required specifications for your oscillator before you can select an architecture. As a minimum please state the following:
DC POWER REQUIRED, V and I
FREQUENCY STABILITY
OUTPUT POWER
TUNE RANGE
LOAD IMPEDANCE
COST AND WEIGHT...SIZE
These are a few but necessary to provide a starting point to select a circuit as well a design architecture.
Applications of MESFETs were initially in microwave circuits for high frequency performance, generally in the range of 1 to 10 gigahertz. As hole mobility in GaAs is 5 to 10 times higher than it is in Silicon and allows MESFET operation at frequencies higher than can be achieved with Silicon devices.
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