Hi I am in the process of designing some X-band microstrip Combline filters. Of course the choice of substrate is very important. I believe the starting point...
Hosam Hasan
hosam_hasani@...
Nov 2, 2005 4:43 pm
1221
I am studying the coupled line theory from Malherbe (Microwave Transmission Line Filters). The text (pp10) develops an equivalent circuit for a pair of coupled...
jrk_636
jrk_636@...
Nov 7, 2005 5:04 pm
1222
James, You can see the expanded versions of the same derivations in Chapter-12 and Chapter-17-C of the manual of Filpro in my web page: ...
Thank you very much for this reply, I will study these sections of the manual. James ... equivalent ... a ... to ... multiplying ... cannot ... I ... two ... ...
jrk_636
jrk_636@...
Nov 10, 2005 12:02 pm
1224
I would like to add some general circuit analysis capabilities to my filter design software and after a reasonable search this reference appears to be one of...
richard_gipps
rgipps@...
Nov 14, 2005 3:53 pm
1225
You can find some useful techniques for analyzing arbitrarily connected microwave networks in chapter 11 of the book "Computer-aided design of microwave...
Hi Richard, A few years ago I had a project at Microwave and High Speed Electronics Research Center, Ericsson AB for Tolerance Analysis of 60 GHz CPW to...
Dear Dr. Snyder, In Table 1 of your paper "A compact, high Power Notch Filter with Adjustable Fo and Bandwidth", MTT, Vol. 42, No. 7, July 1994, how do you...
caaintheusa
caaintheusa@...
Nov 18, 2005 12:14 am
1228
Cti is a tuning capacitance used to adjust the impedance of the shunt, short circuited stub. It is a practical tuning necessity. It is found within an ...
Dear all, I want to know the the analysis method for peak power handling, the analysis of the wideband transient signal flowing throw the filter, the ...
amicloudly
amicloudly@...
Nov 21, 2005 1:51 pm
1230
Dear Sir, My project is design cross coupling coaxial cavity filter for IMT-2000 band. (1920-1980MHz) I have some problem with CST5.0 software. When i use...
dopperranger
dopperranger@...
Nov 22, 2005 1:23 pm
1231
- Loop Coupling - Tap coupling - Probe Coupling - Port coupling On CST software, I can't understand tap port for my cross coupling cavity filter, I used 4...
dopperranger
dopperranger@...
Nov 22, 2005 1:28 pm
1232
That fact that you cannot see a correct 4 pole response probably has nothing to do with the type of ports you are using. From this and your other email it...
Swanson, Daniel
swansond@...
Nov 22, 2005 3:03 pm
1233
... Thank You very much... ... Behalf Of ... for...
dopperranger
dopperranger@...
Nov 23, 2005 12:25 pm
1234
Dan, can you explain how your method can be applied to dielectric resonator filters? I can see how it works for combline but I can't figure how to implement it...
amir_2001_ca
amir_2001_ca@...
Nov 23, 2005 2:13 pm
1235
This subject was discussed a few times in this forum, Here are some references: A simplified analysis for high power microwave bandpass filter structures ...
Dear experts, My design encountered strange phenomenon.The filter with the f0=2.0GHz has two spurious signals in 4.1GHz and 4.8GHz. These are not the second...
amicloudly
amicloudly@...
Nov 26, 2005 5:27 pm
1237
Dear Dr.Yu, Thanks for your response. Yes, the analysis of continuous power handling can be found from Dr.Wang's paper and some other papers. But I think peak...
amicloudly
amicloudly@...
Nov 26, 2005 5:29 pm
1238
Does the spurious frequency have sensitivity to either the diameter of the brass rod or to the diameter of the capacitive disks? I am thinking that perhaps...
None of those papers limit its analysis to CW only. Actually in many applications, CW power level is very much lower than peak power anyway. Once the thermal...
Dear Dr.Snyder, I think it is the problem. I have enlarge the length and the reduce the disk diameter,found it moved a little(about 100MHz), not very...
amicloudly
amicloudly@...
Nov 27, 2005 2:52 pm
1241
If you model the coupling circuit as a sub-network, you might be able to break the brass rod into two or more sections, i.e. change the diameter, and also...
Dr. Richard V. Snyder
rsnyder@...
Nov 27, 2005 3:42 pm
1242
I agree with everything that Ming states, except for the figure of 29 kV/cm for the breakdown voltage in air at STP (standard temperature and pressure). The...
Ralph Levy (r.levy@....
r.levy@...
Nov 27, 2005 7:41 pm
1243
I found very often that customer's spec have connectors of different height in the same product.If I use microstrip for connection, there will be microstrip...
amicloudly
amicloudly@...
Nov 30, 2005 1:01 pm
1244
Hi, take a look at patent libraries, there are plenty of solutions. ...
Hi, I have two questions which are related to each other: 1-What is the relationship between the phase of S11(jw) and S22(jw) for a lossless reciprocal...
amir_2001_ca
amir_2001_ca@...
Dec 6, 2005 4:16 pm
1246
If you consider s=jw, lossless is expressed by the unitary condition of the S matrix; for a reciprocal network this means that: ...
Prof. Macchiarella is absolutely correct in his statement: 'This means that the reflection zeros of S22 can be coincident with those of S11 (on the imaginary...
Oh, sorry, reference [1] in my previous post was Dr. Cameron's paper [1] R.J.Cameron, MTT Transaction, Vol. 51, N.1 Jan. 2003, pp. 1-10 amir ... with ... image...
amir_2001_ca
amir_2001_ca@...
Dec 7, 2005 2:07 pm
1249
1-I understand the need for para-conjugation of the zeros of S11 and S22 and it was mentioned in [1] as well but the relationship given here between F11 and...
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