Hi Indrajit, In reviewing my own reply, I found that I had misspoken. The spacing is near a 1/2 wavelength at the Bragg frequency, not 1/4. The rest still applies! Sorry for the error. I have sent this several times but the MEMS-talk filters do not like short replies! (thinks not enough of original message is trimmed off) So I am making my reply longer by not saying much of anything but consuming bits nonetheless. Best Regards, Art > > > > Message: 2 > > > > Date: Wed, 24 Dec 2003 23:52:59 +0530 (IST) > > > > From: "Mr. Indrajit Paul"> > > > Subject: [mems-talk] bragg frequency(RF MEMS) > > > > > > > > Hello everyone > > > > I am working on RF MEMS based phase shifters, in almost all the > > > > publications there is a mention of bragg frequency which limits the > > > > operation range of the device. However i am yet to get a > single paper > > > > where proper derviation/ implications of this Bragg frequency is > > > > mentioned. > > > > I would be thankful if anyone can help me in this regard. I > > > want details > > > > on bragg frequency . > > > > Thanks in advance > > > > Indrajit