How to design a vco(1.4G)

[neil1981]

I am a beginer of Rf.and i am designing a oscillator of 1.4G.But i dont't konw how to begin it.i have ever read some articles which design it with S-parameter.but not clearly.can u help me?how to design it?Thank u.

 

[gecky]

Hi Neil,

I'm new to this field too but here's a few suggestions:
- go to rfic.co.uk : there is a tutorial for a lumped element (LC) feedback oscillator at 1.2GHz if i remember correctly. The tutorial will get you started.

- next, you'll need CAD tools. Put in the schematic, tune the elements and see things work!

Good Luck!

 

[khouly]

visit www.rfic.co.uk
u will find usefull tutorials there

 

[neil1981]

the examples in that web are helpfull.but i find they are not quite accurate.
for example,in the article designing reflection osc,how dose it choose reflection coefficent of the source ?thank u.

 

[vagarwal]

Hi all,

To understand more on VCO and other designs using S-parameters u can refer to the book by Gozalez. Its available at mcu.cz
Also u can refer to book on oscillator design by Randall Rhea. These would help you to initiate the design and understand the concept.

Regards.

 

[neil1981]

Hi vagarwal:

I am sorry that i can't find the articles or books you have mentioned.can you upload them .Thank u,