Dear Experts, I have to design a waffle-Iron filter with pass-band, 3.7 - 4.2 GHz, which can provide 60 dB rejection upto fourth harmonic and with high-power ...
ramagiri santhosh kumar
santhoshr@...
Apr 6, 2007 12:08 pm
1584
Hi,all experts, Has anybody designed a reject filter which only reject a point freq(for example 900MHz) to -20dB, but the total bandwidth of ripple is about ...
Dear experts, I've got a couple of questions with regard to combline filters: (1) Normally in transformer coupled comblines, by which I mean using extra...
amir_2001_ca
amir_2001_ca@...
Apr 6, 2007 12:13 pm
1586
Amir, You may take a look at Chapter-12 of the manual of Filpro for all of your questions. http://www.eee.metu.edu.tr/~nyil/manual In Figure 12.64 you will see...
Dear All, I have a question about Eigen value analysis of a filter, say a 4-pole filter operating at 2GHz. Assume that that the eigen value analysis of a stand...
salehi_h
salehi_h@...
Apr 18, 2007 2:32 pm
1588
Dear Experts: When we design a coupling window, we always construct a seperated 2-resonator model, unconsidering using the eigen mode method or the driven mode...
Liu, You may find the effect of extra resonators in a quad arrangement in this paper: M. E. Sabbagh, K. Zaki, and Ming Yu,"Full-Wave Analysis of Coupling...
Dear experts, I'm designing a dual-mode canonical filter at 12.68 Ghz ( Ku band ) with elliptic function.. i'm having problem in calculating the cut-off ...
The cut off wavelength for the TE11 mode in a circular waveguide is 1.706 D, where D is the diameter. At 12.68 GHz this cut-off diameter is 0.5456 in., so the...
Ralph Levy
r.levy@...
Apr 22, 2007 6:24 pm
1593
Liu, As far as a design method, I would advocate the port tuning approach. I you build a complete model of the filter in HFSS all the physics of the problem is...
Swanson, Daniel
swansond@...
Apr 22, 2007 9:21 pm
1594
Dear Experts, I an recently looking forward to synthesis coupled resonators filters with finite transmission zeros. I understand Richard Camerron's paper 1999,...
pal_srikanta
pal_srikanta@...
Apr 24, 2007 5:11 pm
1595
Dear Doctor Ralph Levy, As I read several papers, I saw the resonant frequency is f0,k=f0*[sqrt(1+((Mk,k*Bn)/2)^2)-(Mk,k*Bn/2)], where Mk,k is the frequency...
Hello dears... iam facing a problem in simulatng a four pole cross coupled resonator in ADS for extraction of two resonanat peaks , quality factor and group...
waheed313
waheed313@...
May 14, 2007 12:43 pm
1597
Hi all. I m simulating filter freq respond with lump RLC and 1/4 wavelength TLine nework in ADS. RLC is the shunt resonater, Tline is the coupling between...
I am observing in the last months more and more people facing the design of microwave (distributed elements) filters without a real background on this matter....
I would recommend the following literature: A. I. Zverev, Handbook of Filter Synthesis, page 295, John Wiley and sons G. L. Ragan, Microwave Transmission...
Dear Experts, I found it is very difficult to design a helical filter with wide bandwidth,for example 20MHz with a center freq about 200MHz. The input coupling...
It is only because the tap coupling greatly increased the resonating freq of a helical filter. so after a compensation for the freq, it became OK. Sorry for...
Dear experts, I think low freq and wideband hybrid is challenging,for example 100MHz-200MHz. perhaps lumped circuit can be used, can anybody give some...
You have but to look in commercial catalogs to see that the challenges have been solved many years ago. Many companies (examples: Minicircuits, Merrimac...)...
Dear Dr.Snyder, sorry I only read some very recent papers which have not given a wideband solution, it is not long for me to consider the problem and have not...
Dear all, I am not sure if this has been discussed before or not, I am trying to increase the coupling between a metallic combline resonator and a DR resonator...
salehi_h
salehi_h@...
Jun 3, 2007 6:16 am
1607
Hamid, Did you rotate the combline resonator by 90 degree? You may also check this patent 6,081,175 for more information. Best Regards, Chi Wang "salehi_h" ...
Chi Wang
wang.chi@...
Jun 9, 2007 3:25 am
1608
Thanks Chi for your response, Yes, I am aware of that patent but the problem is that I can not change the location of the resonators, so I am left with a step...
salehi_h
salehi_h@...
Jun 11, 2007 1:06 pm
1609
Hamid, it's actually that the size of the tuning screw or gap (capacitance) controlling the coupling. Chi Wang "salehi_h" <salehi_h@... om>...
Chi Wang
wang.chi@...
Jun 11, 2007 1:47 pm
1610
Hello, How can we calculate the unloaded Q factor of microstrip resonator say the open loop square resonator or hair pin resonator? And also does the same...
amohan1232001
amohan1232001@...
Jun 17, 2007 2:55 pm
1611
Dear all. My actual design is about a microwave tubular filter. I need to design this kind of filter using this technology of tubular. To begin i use the...
romain_sevestre
rsevestre@...
Jun 18, 2007 11:57 am
1612
The tubular bandpass filter circuit is what is known as the "dumbell" circuit, based on the physical appearance of the circuit. The circuit consists of dumbell...
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