Questions about X-band tunable DRO

[alimirsaeedi]

I have some questions about dielectric resonator oscillators.

1-I want to know the tuning ranges attainable by mechanical and electronical
tuning of the DROs.(specially electronic tuning)



3-how much can the oscillation frequency of a DRO deviate from
the DR resonance frequency(indicated in the DR datasheet)?

4-Can we have wideband tuning range and at the same time high loaded Q? If yes,How ?

can anybody help please ?

 

[khouly]

X_band tunable DRO

1)the tuning range is limited , coz it depends on the mechanical tuning

2) there are 2 usually used , topologies , serie feedback , and parallel , the parallel used alot in the SAT receivers

3) i don't know , how much it will deviate but it will depend on ur layout , and the prasitics

4) if u want wide band low phasenoise , u should use YIG resosntor , but with DRO u will add a varactor so it will be narrow band

khouly

 

[alimirsaeedi]

Re: X_band tunable DRO

i want the tuning range of dro quantitativly not qualitativly
thanks very much

 

[khouly]

X_band tunable DRO

quantitavly , it will depend on how much the capactaice of the varactor will be changed

khouly

 

[ldynasa]

Though it's been little late, but you could check out "Review of some types of varactor tuned DROs" by N. Popovic.

Electronically tuned DROs at X band are generally expected a tuning range of 1% without serious Q degradation