Hi, I'm currently sourcing this material for my friend. Material: Barium Tetratitanate Epsilon 78 Can anybody tell me the spec or the relevant website? Thanks...
... Do you mean something like this? http://www.temex.net/temex/product/microwav/ceramic/dm.html Perhaps you could be a little more specific as to the...
Any one is there to tell about significance of Q factor in receiver down conversion- I got this doubt to know technically the purpose of selection of...
G.L.Narasimha murthy
murthi_ki@...
Feb 8, 2005 4:14 pm
979
There are sevaral suppliers 1. Polezero with several tunable filters 2. Bowie (china) Roni ... require ... may ... termed ... conduct a ... someone...
Hello, I am interesting in FBAR or MEMS technology for filters. till now I found only narrow BW application for both. I will be glad if someone can advise for...
terry2buchi
terry2buchi@...
Feb 12, 2005 4:28 pm
981
Dear Mr. Saar, I see that apparently no one has responded yet, so here are a few references. The first paper on suspended substrate stripline (SSS) was by ...
Ralph Levy
r.levy@...
Feb 14, 2005 10:41 pm
982
Is the Coupling Coefficient concept a useful one when, for example, two shunt LC resonators are coupled by a series connected parallel LC element? If valid,...
Nevzat, Yes, the concept of coupling coefficient is valid when the coupling element is resonant. The concept is discussed in my joint paper with P. Petre in...
Ralph Levy
r.levy@...
Feb 22, 2005 6:02 am
984
Hi there, It is an interesting question. How do I evaluate or analysis the variation of group delay among samples in production? I have a few clues but am not...
feicaguo
feicaguo@...
Feb 22, 2005 5:02 pm
985
Hello, I have a design of some components (stip line ) in a box, salt water / ice and other environmental depositions on the box are seriously hampering the...
You need to have the housing hermetically sealed. There are a number of techniques for doing this, such as solder-sealing, laser sealing, or using gaskets....
Ralph Levy
r.levy@...
Feb 23, 2005 10:21 pm
987
Hello Dr. Levy and Lazar Ilchev, Thank you for replying to my question. But my problem is a bit different, the circuit is housed in an absolutely hermetically ...
Sorry, I thought that the problem was water inside the box, not just on the outside. If the box is constructed of metal than it is impossible to see how...
Ralph Levy
r.levy@...
Feb 24, 2005 6:44 pm
989
or is the box intentionally a radiating element?...
The material of the box is Nylon. Yes there are radiating elements inside the box. The salt water interferes with the radiation patterns. ... just on ... ...
if you cannot coat the box with teflon or frying pan non-stick spray PAM (or other brands of course), then I suggest you put a shower nozzle near the box and...
Dr. Snyder, This is a very real problem faced in the automotive electronic industry. The volume of production of which, far exceeds millions per year. The...
I am sorry if you thought my answer was too flip. You clearly have a problem with a great prize for solution, but many problems exist that simply cannot be...
I am sorry if you thought my answer was too flip. You clearly have a problem with a great prize for solution, but many problems exist that simply cannot be...
I have been asked to seek possible expert reviewers for the MWCL, covering the subject areas that include the phrases "Defected Ground Planes", "EBG", and...
There are analog problems faced by some broadcast antennas in radomes. An unusual solution there, is in the form of metallic conductors on the radome surface....
Hello, I came across a few messages posted by J. Baabuei, et al with reference to a circulator. (messages # 908 to 911) I am working on a similar problem with...
The extent of coupling between port 1 and port 2 and between port 1 and port 4 can be maipulated. So if we so choose, we can have (say) 80% of the power from...
That still leaves open the question of what you meant by "perfect" coupling. Clearly, energy is conserved so that what couples from the input to another port...
Hi, I want to design a 1 to 16 power spliter in 12.2-12.7 GHz on board RO4003.My approach is using Wilkinson divider but I want the smallest layout which is...
I am not sure I understand your question. I will try to answer what I do understand the question to be. According to my opinion, and I could be wrong, I would ...
The idea proposed by your partners can not possibly work. As Dr, Snyder points out, the directional coupler is a reciprocal device and can not act as a...
Ralph Levy
r.levy@...
Mar 3, 2005 6:50 pm
1004
I agree absolutely with you and Dr. Snyder. That is the reason that I mentioned: " I am not sure if this is entirely possible. If port 1 and 2 are ... But I...
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