Can we use the capacitors(smd) and resistors(smd 0805,smaller) that we use in low frequency (under 100mhz)circuits for up to 3GHZ rf frequency?
If no,what types is suitable?
As far as I know, if the working frequency is under the series resonant frequency of the component, then there is no problem. Unfortunately, not all the manufacturers offers informations about SRF. For example, take a look at Kemet spice, , this manufacturer offers nice graphs with impedance vs freq. for their caps. I use regular 0603 and 0402 at 2,5GHz with no problems.
in the @DS component library none of the capacitors have SRF more than 6-7 GHz. How to design a capcitor which has SRF more than 10 GHz or what can be alternate to this?
Can you make your own capacitors? One type is thin filaments in an interdigital structure. I have also seen parallel plates, air dielectric, types soldered perpendicular to the PC foil. This is really a short open circuited transmission lines.