DC to 5Ghz Attenuator with evaluation PCB

Hittite Microwave Corporation provides samples for their line of standard
RF and Microwave ICs.

I just requested a 5Ghz attenuator and a sales guy confirmed they are on the way.

HMC541LP3
https://www.hittite.com/content/documents/data_sheet/hmc541lp3.pdf

You have to register here:

https://www.hittite.com/shop/register.php

And request samples here:

https://www.hittite.com/sample_request

There are a lot of forms to be filled up so be patient.
You may write "research" or "evaluation" in the applications section.

Hittite has a wide range of RF and Microwave ICs from VCOs, Amplifiers,
Filters ,etc. Although, they usually are in surface mount package , they come with
an evaluation PCB so it is easy for you to make connections.

They don't however sample the non standard parts, designers kits and assembly modules.