X band power amplifier using ads

HELLO
I AM DESIGNING A X BAND SSPA WITH OUTPUT POWER OF 10W....INPUT POWER IS 20db.... CLASS AB USING A HEMT NOT USING A MMIC........I NEED TO KNW RIGHT NW VICH HEMT FRM POPULAR MANUFACTURERS CAN SUITE MY SPECIFICATIONS......

mtechnikhil said:

HELLO
I AM DESIGNING A X BAND SSPA WITH OUTPUT POWER OF 10W....INPUT POWER IS 20db.... CLASS AB USING A HEMT NOT USING A MMIC........I NEED TO KNW RIGHT NW VICH HEMT FRM POPULAR MANUFACTURERS CAN SUITE MY SPECIFICATIONS......

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Hi there welcome to the forum.
a few friendly suggestions....
Please turn off the caps lock ... on the net caps lock infers shouting etc
please dont demand answers right now ... impatience like that doesnt encourage people to answer you
please dont use shortened words like you are texting some one on your phone

you said input power 20dB .... 20dB what ? dBm ? dBW ? dBuV ?
I will assume 20dBm (100mW) .. have you done a google search for such devices fitting your requirements ?
for the output power level you are looking at MMIC amplifiers are the best way to go, much easier to build and more stable in use.
Eudyna is a popular company for producing FETS and MMIC's for the microwave bands ... check out their www site and see what they have

cheers
Dave

Thanx dave for your invaluable suggestions :smile:
i have found FLM0910-25F fitting.........actually i am supposed to do my project based on fet only as we know by using mmic one doesnt need to do much regarding the design in ads....
Also i need to know if there are any predefined tools in ads which help in bringing linearity & efficiency in the SSPA......
& to bring 10W output from 20 dbm input is there any other way than going for two stage SSPA....

What is SSPA?

tony_lth said:

What is SSPA?

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Solid State Power Amplifier a relatively common term around the bands these days ;-)
just to differentiate it from a tube amp or hybrid transistor / tube amp

to the OP'er as far ADS goes sorry cant help with that part, have never used that software

The FLM0910-25F ... wow 20W capability a nice device, being internally matched for 50 Ohms makes that one much easier to use as well :smile: makes my 3W amps look pretty weak!! haha
Dave

haha yup so much r&d going on in this sector its amazing........
Hey dave at what frequency did you make your 3W amp & using which software......can you show me your outputs??
i need to know what internally matched means?? dont i need to design the matching networks for 50ohm terminations?
also what does term "octave band" means?? Its now & then used in SSPA literature....

mtechnikhil said:

i need to know what internally matched means?? dont i need to design the matching networks for 50ohm terminations?
also what does term "octave band" means?? Its now & then used in SSPA literature....

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No, you don't need do anything for internally matched.
Octave band means the stop freq point is double than the start freq point, say 5G~10G.

mtechnikhil said:

haha yup so much r&d going on in this sector its amazing........
Hey dave at what frequency did you make your 3W amp & using which software......can you show me your outputs??
i need to know what internally matched means?? dont i need to design the matching networks for 50ohm terminations?
also what does term "octave band" means?? Its now & then used in SSPA literature....

Click to expand...

As Tony replied, internally matched means no elaborate stripline impedance matching is required.
Actually I dont use any software ... one day must have a play with one or two packages. Primarily, I experiment by physically building and refining as I go. As far as my microwave band work goes, it isnt for commercial use and hence I dont have to be as exact with my activities. But I do need to make sure, of course, that various devices are being operated within their parameters. my 10Ghz activities are on the 10 - 10.5GHz amateur band and specifically 10.368GHz for narrow band FM and SSB operations and 10.4GHz for ATV amateur TV operations.
for my amps I'm using the eudyna FMM5061VF X-Band 2W MMIC Pwr Amp (9.5 - 13.3GHz) produces an easy 2 - 3 W output with 10-20mW of drive.

cheers
Dave