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42 Threads found on Cavity Filter Design
Hello, How we can design the Narrowband Microwave bandpass filter using cavity Resonator filter coupled with small irises ?? How we can decide the size and type of iris that can be suitable for our filter?? Is there any limitation for using the number of iris structure that can use for one (...)
An LC filter at this frequency AND bandwidth it will not work properly mainly due to the low values of components, which will be in the range of fF and pH. cavity or a SAW can give appropriate performance. For SAW filters check, Murata, TDK, Taiyo Yuden, Tai-saw
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 everybody, I have a question about cavity filter design, I?m new in the RF filters, while finding the coupling coefficient between two resonators I?m using eigenmode solver in CST but I dont know what does the modes mean? which mode should I choose in eigenmode solver ? and my cavity (...)
Yes you can do it this filter with lumped elements but the insertion loss will be very high due to high selectivity requirements because you will have to use many lossy components. Instead, if you can design a helical/rod EM coupled filter in a good cavity, the insertion loss will be lower and the selectivity may be as good (...)
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
i need the information regarding which tool is the best to design diplexer filter.and some reference material my requirements Tx filter: 2025 MHz to 2125 MHz Rx.filter: 2200 MHz to 2300 MHz rejection of other (...)
Hi all , I'm looking for the design formulas for a cavity filter . I want to build a cavity filter for 408MHz for radio astronomy purpose . The idea is to place an adjustable tube inside another tube and working with coupling loops to form a cavity filter, just like (...)
Dual mode refers to the degenerated mode in a cavity, which has the same resonant frequency, such as HEM11n mode. When perturbation was introduced, the degenerated mode will be split into two modes with different resonant frequencies. By using dual mode design, one can realize a two pole filter with only one (physical) resonator, and realize (...)
How many resonators do your 3D object has as a cavity filter?
Hi, I am trying to design an interdigital bandpass filter with round rods and tried two synthesis sofwares 1- An excel software in 2- intfil.exe both of them are free on the internet However, when i used the results of these sofwares in CST, the simulation results are very very bad. Is there a limit for the frequency range of t
Hi there I'm trying simulate a coupled cavity photonic crystal switch including kerr effect,but i don't know how can calculate n2 for given refractive index change and power? Can anyone help me?
Try this software for single cavity design: The coupling between resonators without iris may give a filter response of bandwidth about 10-20%. For narrower bandwidth, you may try increasing the helix distance. For even wider bandwidth, there might be a limit for the input coupling. To what degree, I think you have to do s
You are looking for a 1% bandwidth of central frequency. This is almost impossible to do using microstrip components. Microstrip filters generally have 10% up to 25% bandwidth of central frequency. The only way to realize this filter is to use cavity topology. This can be tunable, but having big dimensions.
Dear cavity filter experts, Please discuss the soltions to improve the stability over temperature varying. Are there some commonly used solutions? thanks y99lx
hi, the best design method to realize the RF BPF (NOT cavity filterS) The specifications: Passband range: 400MHz-600MHz Passband Insertion Loss: < -3dB Passband Return Loss: >-15dB Attenuation at 10 % away from bandwidth is around -60dB please help in getting the best design method... thank you
hi, the best design method to realize the RF BPF (NOT cavity filterS) The specifications: Passband range: 1800MHz-2200MHz Passband Insertion Loss: < -3dB Passband Return Loss: >-15dB Attenuation at 10 % away from bandwidth is around -60dB please help in getting the design method... thank you
im run the helical cavity bandpass filter for very narrow bandwidth filter 0.5MHz, and center frequency is 30 or 90 MHz, I have done lots research on this topic, but few materials can be found, and this technology is being used for very long time, but this type of filter does not have any synthesis software compare to LC (...)
could use some assistance or guidance on a filter design I am working on. We design our combline and cavity filter via a coupling matrix. The coupling between resonators are given in coupling bandwidths. A 2 port model is created in HFSS then we extract the sparameters from HFSS then import it into a (...)
I think you need to go for cavity filters than microsrtip.

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