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mems based high Q resonator

Posted 2011年1月7日 GMT-5 01:08 MEMS & Nanotechnology, MEMS & Piezoelectric Devices Version 4.1 3 Replies

Vikram Kumar Singh
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sir

i want to know why high Q is nessary in resonators and which type resonators will gv high Q at high freq(GHz)

generally disk resonator gives high Q around 11500 other then that

and which type couple field analysis we should use.

and how we can increase the quality factor

3 Replies Last Post 2013年10月18日 GMT-4 03:52
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 2011年1月7日 GMT-5 02:12
Hi

well for me your question is the quest of most "resonator" engineers, there is no one answer anyhow. But I can just remind you that Q is related to damping and damping is in my view one of the most difficult thing to model correctly, because there are many physical phenomena that bring damping, including the "numerics" and sometimes the solvers themselves

--
Good luck
Ivar
Hi well for me your question is the quest of most "resonator" engineers, there is no one answer anyhow. But I can just remind you that Q is related to damping and damping is in my view one of the most difficult thing to model correctly, because there are many physical phenomena that bring damping, including the "numerics" and sometimes the solvers themselves -- Good luck Ivar
Vikram Kumar Singh
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Posted: 1 decade ago 2011年1月7日 GMT-5 02:22
thank u sir for ur reply

sir as you said Q is related to damping and which is difficult to model,
sir can u reply what r the different physical phenomena that bring damping, including the numerics and sometimes the solvers .
thank u sir for ur reply sir as you said Q is related to damping and which is difficult to model, sir can u reply what r the different physical phenomena that bring damping, including the numerics and sometimes the solvers .
Li Chenchen
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Posted: 1 decade ago 2013年10月18日 GMT-4 03:52
hi,Ivar
if i just consider the air damping ,could you just give me an example?
hi,Ivar if i just consider the air damping ,could you just give me an example?

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