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varactor diode for vco application !

thread239-102418

varactor diode for vco application !

varactor diode for vco application !

(OP)
hi

im looking for the lowest Rs parameter varactor diode for a very low noise , wide band vco (2.5 - 3GHz).
the demands are for a :

1. 25v Br voltage diode
2. low Rs (high q) - around 0.4 ohm
3. low capacitance (from 5pf to 0.8pf Vs the Vt)
4. low cost

I saw the toshiba diodes and they look great ,but there
is no diode that meets my demands.
i also cheked the microsemi,infenion,sprague !

thanks

RE: varactor diode for vco application !

(OP)
thanks for the information , but i allready checked these sites.
i just wondered whether someone used such a diode in the past and could spair some tips regarding the issue !?
or can recommand on a reliable company which has great
low Rs varactors .

BR
guy

RE: varactor diode for vco application !

Check out Panasonic MA27V11.
Available at DigiKey, PN MA27V11CT-ND. Cost: reasonable.
Data sheet available online at DigiKey.

RE: varactor diode for vco application !

The highest Q diodes are made with GaAs.  A little hard to find now adays, but some are still out there.

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