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272 Threads found on edaboard.com: Bandpass Filter Design
Hi, GBW: I donīt see why a factor of 100 shoulld be necessary. at least 5 maybe 20. Noise: Iīd use an Opamap feedback to create a 58kHz bandpass. This reduces unwanted OPAMP noise. Then you donīt have to worry about Opamp noise. Power supply: Make it simple. Potentiometer, filter adjustment: Why not a fixed bandpass and the rest inside (...)
I am used to a medical technician telling me 'Now stay absolutely still during the test'. The technician takes readings. I suppose if I move once or twice, the technician recognizes it as an irregular reading, and ignores it. Your device needs to be smart enough to reject irregular readings. A simple bandpass (or bandstop) filter may not be suffici
can anyone help me in designing a bandpass filter for 2GHz to 6GHz using microstripline i would mainly like to know how the lumped elements are converted to striplines. thanks in advance
You can create a bandpass filter by putting in a series inductor. Or as an alternate there is a 2-capacitor bandpass. Perhaps it's not giving away too much if I post These are merely two easy methods. By play
Hi I need to design a bandpass filter at 64 MHz with passband of 3 MHz and insertion loss of less than 0.5 dB. I tried to design using lumped element LC topology. The simulation results are great but the very sensitive to value to the components. Even a 0.1 nH of pF variation is causing the response to vary drastically. (...)
Hello everyone, Which substrate material is suitable for Narrow-band bandpass filter(coupled line type) at 10 GHz, A low dielectric material(like er=2.2) or high dielectric material(like er=10.2). I need to keep insertion loss as low as possible.Please help me out. Thanks and best regards
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 (...)
I have a signal of 315mhz running over a 24VAC/60hz power buss. I need to "pull out" or pass the 315mhz, so it can be used, but not the 60hz. I was going to do something like the below circuit: 126244 Plan was two 0.022uf hgh voltage caps to filter out most of 60hz (high pass filter) Then have a band pass tuned
Hi, I am using Microwave office to design filters. I am designing bandpass filters in the frequency range 160 MHz +/-25 MHz bandwidth and also 160 MHz +/-0.25 MHz. Second frequency range is 1000 MHz +/- 250 MHz and also 1000 MHz +/- 12.5 MHz. 1. Rejection level is 50 dB min away from 3 dB bandwidth. (...)
122082 122083 This is so weird. I build this simple bpfilter. I used t50-6 amidon. I want it for 18.1 Mhz. So, in spice its perfect with either 3300pf and 24nH... Or 2200pf and 35nH. (2 or 3 turns, inductor). I tried both. As you se it works over 18 Mhz in spice but then i build it for real t
Hello, I am following the design example of an interdigital filter with symmetric coupled lines as given in Microstrip filters for RF-Microwave Applications (Lancaster), page 141. I managed to calculate the characteristic impedances in even and odd-mode and, consequently, the coupling coefficients. My struggle is to calculate the spacing (...)
Dear Members, I would like to design a single bandpass filter that passes the following frequency bands and blocks all other harmonics: 0.88-1 GHz, 1.75-1.95 GHz, 2.3-2.5 GHz and 5-6 GHz. Can someone please suggest the methods of desiign such filter using distributed components. Awaiting replies, Regards
Thank you for replying me. I am struggling with the bandpass filter design that I have to use with the IR diode. The tsop sensor itself contains the 38khz filter. Whats the better method for it ?
hey can anybody guide me to design bandpass filter using lumped components ONLY in ads and how to check the results ?
can anyone please provide me tutorial of how to design microstrip band pass filter in HFSS
Hello, I want to design 5th order butterworth filter. ............. Which steps can I track? How deep is your knowledge? Do you know the difference between several available design strategies active, passive, cascade design, direct design,...)? By the way - there is no bandpass of (...)
This isn't actually an active bandpass, rather a passive LC filter followed by a gain stage, which simplifies calculations. Obviously you got the resonance frequency wrong, but that's no the only design problem. You should face the fact that it's almost impossible to achieve the intended Q of 400 for 6.8 MHz filter with (...)
Dear Ali, I found some papers to do that as following: 1)Basic Data on High-QCeramic Coaxial Resonators 2)IEIECE Trans. Electronic, Vol.E82_C, Bo.7, July 1999, Page 1110 3)Ceramic bandpass filters-Boon or Bane? 4)A bandpass filter USING DIELECTRIC COAXIAL RESONATORS WITH A TEMPERATURE-STABLE STEPPED- IMPEDANCE (...)
Hi, I have an S2P file of a SAW filter containing S-Parameters S11, S12, S21, S22. I want to use these data to implement the filter in my MATALAB code. Is there something like: d = fdesign.bandpass(.......'S-PARAMETERS extracted from S2P file' ....); Hd = design(d,'.....'); ?????? Thank you (...)
I want to design a bandpass filter using equivalent circuit of a two port MEMS resonator. My frequency is 400 MHz. I want to start with the schematic and then design the layout in momentum.