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Thank you.
This answer is what exactly I looked for (experience with dielectric constant, suggested by MWI).
Another question is about non-isotropic dielectric constant of RO4003 (it shows slightly different dielectric constant in X, Y, and Z directions). Therefore, its dielectric constant may...
Hi everyone
I have designed a coupled-line filter at X-band using Ro-4003 with 8mil of thickness.
Rogers Software (MWI-2016) suggests dielectric constant of 3.81 for this substrate, this thickness, and at X band. this number has significant difference with popular dielectric constant for RF...
Hi everyone
I've simulated a coupled line band-pass filted using HFSS 2015. S11, S22, and S21 are reasonable and like my expectation, but S12 is irrationally deformed in passband. See below photos:
I used fast sweep, I used different Solution frequencies (in some cases the problem was...
ZNBG3210 is the core bias and control element of LNB circuit. The ZNBG provides the negative rail, FET bias control, polarization switch control, tone detection and band switching with the minimum of external components.
I use HFSS to simulate a bandpass filter with WIDE gaps between its coupled lines. These wide gaps made the simulation time very long and hard to converge. In fact, very small meshes are required to correctly solve the problem.
Is it any trick to manage this problem?
I heard about spare lines...
Are you sure that the difference between CST and ADS is because of using lump-elements? I guess CST considers lump elements as ideal elements(like what ADS does).
It seems you want to feed a simple wave-guide. If so, why do you define an integration line? HFSS considers wave-port as an infinite wave-guide which automatically feed correctly, I mean with correct polarization and the dominant mode. In lump port definition you have to define an integration line.
I saw many wrong replays here (For example: wave and intrinsic impedance have same value only in TEM mode). Stick on what is mentioned in genuine references like Pozar book. I have just checked wikipedia.org and it seemed authentic.
Re: simulating the "Stripline parallel-coupled lines filter" on Advanced Design Syste
thank you. but imported file cannot consider the coupling effect. in addition, how can I use the imported file in schematic design (maybe those file are useful in momentum but how about optimization and ...)...
simulating the "Stripline parallel-coupled lines filter" on Advanced Design System
How can I draw the microstrip parallel-coupled lines in ADS (the file be attached in this post, shows the structure). In fact, these lines with unequal length, offset beginning position and desired angle are used...
I have attached my primary design here. (my exact desired frequency is 9.2 to 9.6 GHz; rejection in lower side is crucial and not for upper side) as you can see; 1-the dimensions are so large(in length) 2-structure is so sensitive 3-passband frequency is not accurate.
can you help me for...
How can I design the Waveguide filter structure? I saw some simple and standard (made with practical waveguide as wr90) structure; it's simulation results are ok with HFSS but the bandwidth is below 100 MHz (I want 500 MHz). Can I achieve this bandwidth by waveguide structure?
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