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a low phase noise , low cost vco design

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suwu

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coaxial vco design

a low phase noise , low cost vco design
 

shou

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how about the frequency?
 

xiongxiaogan

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not enough information.. for the design
 

sintis

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Frequency about 950MHz, tuning range 30MHz.
 

shogun

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Problem with microstrip resonators is that the overall Q is not very high, for the same space you could use a coaxial resonator and achieve lower phase noise. Whilst the high Q resonator will give you lower phase noise you really have to consider the matching from the resonator to the active device. ie resonator to the base of the transistor.
 

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