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73 Threads found on edaboard.com: Even And Odd Mode
I have problem in obtaining width and spacings of coupled lines from even and odd mode characteristic impedances. What problem? Do you have a basic idea how to proceed? Have you looked at transmission line calculators which calculate Z0e/Z0o from the physical dimensions?
I have simulated conductorbacked coplanar waveguide in CST. However I am getting only odd mode fields and not CPW mode ie even mode. Any Suggestions
Hello, I'm currently designing a Patterned (w/ Slots) Marchand Balun to increase the even/odd Impedance Ratio for good balance. LineCalc is able to simulate Zoe and Zoo given the width and spacing of a coupled lines but it assumes an infinite ground plane. However, for the patterned ground plane, (...)
name is Tia and I was in my final year and i having the difficulties in building microstrip hairpin filter for Ultra wide-band application. i was at loss on how to obtain the filter dimension and spacing. at first, i had already followed the pozar and other several books and successfully (...)
In an empirical way, you can slightly change the gap in the two coupled lines, and that will shift the resonances that depend mostly on odd mode excitation. You can then keep the gap constant, and change the line width of the two coupled lines, which will change the resonance of the even (...)
hi i m simulating a waveguide structure as a coupler. its a four port structure. i need to calculate even and odd mode propagation constant. i have used driven modal solution but it cannot calculate even odd mode beta. i have seen in some other threads that (...)
you can not have negative even of odd mode impedances.
I wrote my own MoM closed box code to solve symmetrical microstrip discontinuities. I use even (1,1) and odd (1,-1) mode excitation and extract the s-parameters from the result current distribution. I am trying to find our what excitation should be used and the corresponding s-parameter (...)
even and odd are excitation modes, and not radiation modes. The second document provides well explanations about these modes.
When you work with differential lines, even and odd mode impedance are real and relevant.
An even/odd mode velocity disparity, like you get in microstrip coupled structures, means literally that some of the energy will arrive at the output by one path, and some of the energy will arrive at the output by another path (in a mathematical superposition sort of way). There, the two will vectorially interact (add or (...)
when two microstrip lines are coupled, they exhibit even and odd mode(please refer any basic microwave engineering book), each of these modes result in separate impedances ,Zoe and Zoo such that Zo=√(Zoe.Zoo)=50 ohms(approx.) Now you need to know these values to find coupling (...)
I'm using HFSS for a specific coupled CPW line simulation. Driven modal are used. Two waveports are places at both ends of the coupled CPW line and two modes (even mode and odd mode) are excited at each waveport. However, at two ends of the coupled line, the simulated (...)
Seems the HFSS 11 or 12 has some changes in result report. In HFSS 10 or ealier version, I see the method to extract the even and odd mode impedances of couple-line as follows in the previous post. (1) Choosing the driven terminal (not driven modal); (2) draw two terminal lines when setting the waveports; (3) after (...)
Hi: anybody here could show me how to get the even and odd mode impedance of coupled lines in momentum? Thanks In Advance.
Hello, friends. I would like to design a direction coupler at a center frequency of 2.6 GHz. I prefer to simulate the strukture in the HFSS software. But i am not clear with the definition of the even and odd mode port definition. Can anyone give me some suggestions or send me some examples? Thanks a lot :) (...)
hi what is the relationship between the single-ended, diff, odd, even impedances ? i know Z_diff=2*Z_odd. but Z_se= ???? is it equal to even mode impedance? With the TNT MMTL program, I get even and odd mode impedances, not diff (...)
how to calculate even and odd mode effective dielectric contant from effective dielectric constant.plz specify equations if any.
how can I implement the parity check on uart ? i do know i can set to even or odd mode ... but where can I insert it ? how do i check number of even '1' and odd '1' ? any vhdl code for parity check ?
Yendori is correct. When used as a power combiner, it depends on whether you are exciting an odd or even mode at both ports. When exciting an even mode, both branches are perfectly in balance, no current will flow through the resistor and you get the sum of both powers at the input. (...)


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