10 GHz analog front end for a sampling oscilloscope

Hi All,
I am working on sampling oscilloscopes but with no much knowledge on the components I need for the front-end of the data acquisition module. I want to sample repetitive analog signals of as high frequency as 10GHz using an approach similar to equivalent-time sampling.
I want to introduce small time delays to the signal but the delay will depend on the frequency of the signal being measured. Am thinking of using an FPGA ADC that can sample 600ksps. What are the analog components do I really need for this job? Can someone help me please. Thanks in advance.

why don't you study the circuits and operation manuals of existing sampling oscilloscopes, e.g. from Tektronix. A lot is available on the internet.

but the delay will depend on the frequency of the signal being measured

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Don't understand what you're referring to.

Generally, the control circuitry for equivalent time sampling is rather slow, except for a critical jitter specification. Classical 60th/70th sampling oscilloscopes with e.g. 18 GHz bandwidth have been sampling the input signal directly without any preamplifier. They are using schottky sampling diodes, avalanche pulse generators and step recovery diode pulse shapers. I guess, you would need some years of trial to reproduce the performance of these instruments in a new design.

On the other hand, the front ends of today's digital high speed oscilloscopes are achieving similar speeds with real-time sampling, mostly on a single chip.

Hi,
Thanks for your contribution. Am sorry for posting a question that is not very clear.

I think what I need at the moment is a fast sample-and-hold circuit that can handle up to around 10 GHz frequency. Somebody please help me. Thanks in advance.