Diode for very high frequencies

hi All,
i'm interesting for diodes that are working at very high frequencies (over 50GHz)
any suggestion is welcome.

Hi,
I suggest you to have a look at PDB (Planar dopped Barrier) diode. We use it for the power measurement of RF signal at 50 GHZ.
See Application Note of Agilent.

Plannar Gun Diode over 100GHz.

http://eprints.gla.ac.uk/3984/
http://iopscience.iop.org/1674-1056/19/12/127203

Novel planar Gunn diode operating in fundamental mode up to 158 GHz
http://iopscience.iop.org/1742-6596/193/1/012029

thanks for your replies,
i will follow your suggestions,

Also take a look at Virginia Diodes.

http://vadiodes.com/

At above 50 GHz, most diodes are marketed in chip form. If you need a really good Schottky diode , please contact Spacek Labs. Inc. "www.spaceklabs.com" for the diodes in "picopill" enclosures, 0.5 mm dia. x 0.4 mm long, usable up to >110 GHz.

thank you very much for your answers.

I think same you

Step recovery diodes are also an option for the >10GHz application.