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29 Threads found on edaboard.com: Combline Filters
I want to design Design combline. I practised followed the A Practical Design of Lumped, Semi-Lumped and Microwave Cavity filters (Dhanasekharan_Natarajan'book) with Hfss Software but i don't know how to turning length of skew to achieve results? Please help me. I found the document :
Hello everyone, I am trying to design combline cavity filters according to Puglia 1 Puglia 2. I can calculate lowpass g-goefficients and coupling factors for my
combline filters, due to using loading capacitors on the resonator lines, the total line dimensions are smaller compared to other filters as, Interdigital, Parallel Coupled, Hair Pin, etc. Regarding the question, where can be used, the answer is: mainly in UHF up to few GHz circuits.
Hello Martin, The Default Filter Wizard in MWO is a very Basic tool or template for filters design...You need to use advanced tools available in AWR MWO such as iFilter or Nuhertz Filter Solutions Wizards to quickly design combline filters... See the below attached pictures which generates ready to use layout & schematic for (...)
Combine filters are microstrip-based, so same problems with limited Q and tolerance . Am I missing something here? The combline filters being mentioned here are the cavity type, so it has low insertion loss unlike microstrip.
Hello, There is a free tool from Nuhertz Filter solutions for Filter design... & also a 30 days full version trial license also available it even as the dxf & sonnet export for Planar combline Transmission line filters... Then finally use the Sonnet Lite free version to validate, see here some examples
Hello yosi123, for Filter design if you use Nuhertz Filter Solutions product along with AWR Microwave Office you should be able to impliment any filter structure... Also for accurate EM analysis of Filter structures with Box efects use the Sonnet em simulator... Here are the some of the published articles on the same... combline filte
hi , im designing combline round rod filters for c band but im having doubt that is round rods are solid or hallow ?can tuning be done on the top of the rod or in to the rods also as rods are like tube ............? is there any change in the design of those solid rods and hollow rods filter design ....any one know this is ? thank y
hi to all, any one tell me that the length calculations for the both interdigital and combline round rod cavity filters are same or not?(becas it only depends on frequency ) thank you
hi, how to calculate band width rejection in cavity filters(combline &interdigital case )? thank you
hi to all, i have the design equations of the inter digital filter , how can use these equations for the combline filter design , is there any equations are modified for the combline filter. if both filters can use the same equations, plz tell me ihave this paper with me to design inter digital filter ,plzzzzzz clear my doubt, (...)
Hello mallelauma, Try Nuhertz Filter solutions Filter Free ... Multi-Conductor filters Interdigital, Hairpin, and combline filters are available. Interdigital and Hairpin filters may be calculated with and without tapped and hairpin resonator end-couplings, and with and without ground en
Hello mallelauma, Attached are the requested documents on combline filter design... Design Equations for Tapped Round Rod combline and Interdigital Bandpass filters ---manju---
combline filters are transmission line filters. Cavity filters are totally hollow areas enclosed by metal and have standing wave patterns. Power is coupled in and out by irises in the case of waveguides and electric or magnetic probes in the case of coaxes.
Hello All, I am simulating a cross coupled combline filter on HFSS using Irises for cross coupling. I have got the normalized coupling matrix but now I am facing difficulty in finding out the Iris dimensions for the given cross coupling values. What I did was that I simulated a pair of combline resonators with an Iris in between and ran an e
Hi, does anyone know of an appropriate software to simulate cavity filter and cavity duplexer response. I am curious if the software can tell us the cavity diameter and spacing in case of interdigital and combline cavity filters
Hello Everybody I want to purchase a software that simulates combline and Interdigital filters. The simulation is called Electromagnetic Mode Matching: I know of 2 programs that do the Electromagnetic Mode Matching simulation: 1. WASP-NET of MIG 2. mW Wizard of MICIAN Do you know which one is best? Regards Moti Attias
Hi, A filter is build by resonators. E.g. a combline filter can contain several resonators. A resonator resonates at certain frequencies related to a wavelength.
Fast analysis and optimization of combline filters using FEM.pdf
On my experience, the main loss in combline filters is resistive loss in lines and box walls and jointings. A chip capacitors not good for this filter type due to high parameters dispersion; topological caps more good.
Hello all, Need the following Articles or any other related documents ... RM Kurzrok ?Design of combline Bandpass filters?, IEEE MTT-14, July 1966, p.351 S. Caspi and J Adelman. ?Design of combline and Interdigital filters with Tapped Line Input? IEEE MTT-36, April 1988, p759. I.Shapir and V. Shamir, (...)
I want to design combline filter in microstrip form and in L band(2-4GHz). I want to see the shematic of some practical design (please send me if any pictures are available) and I want to know how the capacitors of this type of filter (in microstrip form and in L band (2 GHz))are designed (I can't find any practical design in the intern
Not sure if you meant coaxial combline filters or empty cavity type. They are almost always used interchangebly. Either case, the example presented using HFSS should help.
All: I am a RF Engineering Student and I didnt know if anyone out there had any resources to help me get started in designing a 915MHz combline Filter. Any suggestions or references would be appreciated. Thanks!
Most of the information published in the 1960's and 1970's only works for coupled resonators with quarter wavelength. If you design a combline filter and use say Cristal's or Kammler's equations, the bandwidth will be too wide. But ... There is a short correspondance from R. Kurzrok in the July 1966 IEEE MTT titled "Design of comb-line band-pass
to design of combline filter the very important point is convert self and mutual capacitance to space and width of resonator. this software done this work, but chcke output of this sofware by microwave office and see that this designe is not correct. snmeciut
For calculation a handling power of filters I wrote the next MathCAD programme. Using this programme you can find minimum distance between critical points in filter's structure. For example in combline filter, such points are top pieces of rodes and nearest part of tuning screws , where is highest level of E-field. I use this method at a previous
Hi dule ! It's normal that you need long time for solving in CST( based on FEM code ). Without several processors and lot of memory you can not simulate and optimize so big structures in CST . For structures like combline filter try with specialized software like as WASP-NET ( ).
Does anyone have experience in combline filters with slabline resonators? I have to design a C-band band-pass filter and I've started out with CST MWS. I was able to get the passband nearly where I wanted it but I can't optimize it for example to a Butterworth response. I even tried out an example filter from a G. Matthaei book and I had sim