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## Odd Mode |

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even and odd mode , even odd mode , even and odd and mode and hfss , odd even mode hfss

94 Threads found on edaboard.com: **Odd Mode**

You have to understand **mode** decomposition, even(=differential) and **odd**(=single-ended).
If you consider only even **mode**, signal source impedance should be 25ohm as singled-ended, this is equivalent to floating source impedence of 50ohm as far as concering even **mode**.
These concepts are linear, so it is not difficult to (...)

RF, Microwave, Antennas and Optics :: 01-24-2017 13:22 :: pancho_hideboo :: Replies: **2** :: Views: **785**

Hi Eres_89,
You mentioned that you have calculated values for Zoo and Zoe. How did you determine the **mode**s ? For example, for **odd** **mode**: You have fields coupling between the top two traces. Similarly,for the bottom traces - Fields going from the center signal line to near by grounds. What about even **mode**s ?
If you know (...)

Electromagnetic Design and Simulation :: 11-30-2016 02:12 :: sv1437 :: Replies: **1** :: Views: **621**

Differential Transmission Lines have 2 impedances.Even **mode** and **odd** **mode**.The characteristic impedance of a differential lines is composed of these two **mode** dependent characteristic impedances.For more information, "RF and Microwave Coupled-Line Circuits", Inder Bahl, Prakash Bhartia,Rajesh Mongia.
Artech House

RF, Microwave, Antennas and Optics :: 11-24-2016 16:55 :: BigBoss :: Replies: **5** :: Views: **1557**

Hi
How can I calculate even and **odd** **mode** velocities in quasi-TEM **mode** for transmission lines?

RF, Microwave, Antennas and Optics :: 04-21-2016 10:18 :: s.rebelli :: Replies: **3** :: Views: **931**

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 betwee

RF, Microwave, Antennas and Optics :: 10-01-2015 13:42 :: viniciuslb :: Replies: **1** :: Views: **1067**

You don't have to add P2,P3,P4 since you have a GND layer.P1 and ta the other side another Port let say P2 will be good enough.
Differential **odd** **mode** port configuration is only used when the GND layer is not present so RF return path is maintaned by side layer only.( Exiting + and - Ports are **odd** **mode**)It's generally used in (...)

RF, Microwave, Antennas and Optics :: 09-04-2014 21:44 :: BigBoss :: Replies: **9** :: Views: **1466**

I have an **odd** problem the value of OCR1A is automatically taken as 0x3FF, below is my code
int main(void)
{
// PB1(OC1A) is now an output
DDRB |= (1 << DDB1);
// set PWM for 50% duty cycle ((65536/2) - 1 )
OCR1A = 0x7fff;
// set none-inverting **mode**
TCCR1A = (1 << COM1A1);
// Fast

Microcontrollers :: 08-31-2014 08:49 :: Embedded_Geek :: Replies: **0** :: Views: **644**

Input impedance is function of **odd** and Even **mode** impedances of coupled lines.Therefore you should find these impedances first by calculating or simulating.
You can read something about those in Bahrtia's book.

RF, Microwave, Antennas and Optics :: 08-06-2014 18:33 :: BigBoss :: Replies: **9** :: Views: **1722**

Hello, I need some help in design a directional coupler, I got the results in MWO but they does not match in HFSS, any one know or have a file about special condition to design Directional coupler coupled line in HFSS please help and I know to see the even and **odd** **mode** but I don't know how or calculate the even and **odd** impedance

RF, Microwave, Antennas and Optics :: 06-19-2014 14:07 :: simonBITW :: Replies: **0** :: Views: **1342**

I have to receive data from a Device through RS232 using 9600 Baud, NO parity,7 Data bits and 1 Stop bit.
The Device is Pre programmed to select different Baud rate, **odd**/EVEN/ NO Parity, 7/8 Data bits and Fixed Stop bit as 1.
My project uses 89C52 controller and setting the serial port (SCON) **mode** to 1 (9bit) I am able to receive the data with

Microcontrollers :: 03-23-2014 06:15 :: vdurgaidass :: Replies: **0** :: Views: **19111**

I have to receive data from a Device through RS232 using 9600 Baud, NO parity,7 Data bits and 1 Stop bit.
The Device is Pre programmed to select different Baud rate, **odd**/EVEN/ NO Parity, 7/8 Data bits and Fixed Stop bit as 1.
My project uses 89C52 controller and setting the serial port (SCON) **mode** to 1 (9bit) I am able to receive the data with

Microcontrollers :: 03-23-2014 06:05 :: vdurgaidass :: Replies: **3** :: Views: **2217**

Your calculations is not exactly correct.**odd** and Even **mode** impedances are valid only and only if there are 2 coupled lines.But if there are more than 2 coupled lines like in your filter structure , it's hard to say that formulae will still be valid in any case.You forget other interactions between-for instance- first element and kth element.

RF, Microwave, Antennas and Optics :: 12-30-2013 20:46 :: BigBoss :: Replies: **4** :: Views: **1177**

Hello,
My task is to calculate all the impedances of a 1-4 Wilkinson power divider by using the even and **odd**-**mode** method.
I'm not quiet sure how to do that,so could anyone help me with that?

RF, Microwave, Antennas and Optics :: 11-08-2013 12:57 :: belma1511 :: Replies: **6** :: Views: **1159**

I can't understand how to use varactor for tuning ring resonator.
First, there is a ring with all resonances: n=1,2,3,...
Then, we add a gap, and **odd** **mode**s dissapear, so we have n=2,4,8,...
And the last, we add varactor, and what happens? We need a second gap to maintain biasing.
As i do not want second gap, we can put varactors in (anti)series

RF, Microwave, Antennas and Optics :: 10-16-2013 07:20 :: Terminator3 :: Replies: **0** :: Views: **503**

Hi
I am unable to understand how a branch line coupler works physically. By scattering matrix or even-**odd** **mode** it seems ok, but any physical explanation??
I got some explanation as follows: If port 4 is terminated the port 1 will be matched and the power equally divided between port 2 and 3 because both have same impedance Z0. and phase differenc

Service Manuals, Requests, Repair Tips :: 05-23-2013 11:40 :: Sri_kanth :: Replies: **0** :: Views: **737**

Hi Darktrax,
Yes. The two signals must be in phase in order to add into the in-phase port, or in counterphase in order to add into the other port.
If the two voltages are V1 and V2, the outputs at the two ports are (V1+V2)/sqrt(2) and (V1-V2)/sqrt(2) (even- and **odd**-**mode** respectively), when "+" and "-" are vector operators.
Regards
Z

RF, Microwave, Antennas and Optics :: 05-17-2013 02:31 :: zorro :: Replies: **2** :: Views: **1623**

Hi there
I need even- and **odd**-**mode** characteristic impedance design data for symmetric coupled microstrip lines on a substrate with various Er.
I found a design graph in Pozar's Microwave Engineering book, but it's for Er=10, I need design data for instance Er=4.6.
Where can I find sth like this, can anybody help me?
thx

Electromagnetic Design and Simulation :: 05-01-2013 12:15 :: sayyedjamal :: Replies: **0** :: Views: **1978**

Hi
U need to calculate the even and **odd** **mode** impedance of each coupled line. You can then use the ADS LineCalc tool for getting the gap, length and width.
Regards
Twisha

RF, Microwave, Antennas and Optics :: 02-13-2013 09:10 :: Twisha :: Replies: **7** :: Views: **1262**

Hello everyone,
I might need your help!!
I have a touchstone file (s4p, S-Paramter) describing a coupling structure including two 'transmission lines'. Now I want to make an eve-**odd**-analysis using a circuit simulator (ADS). Do you know how to find out the even/**odd** impedance and the characteristic impedance matrix for the entire structure? The c

RF, Microwave, Antennas and Optics :: 07-13-2012 15:31 :: frischling :: Replies: **5** :: Views: **1430**

Hello,
I have question about coupling in multilayer microstrip.
I've read some books about coupling that include extraction of capacitance for even-**mode** and **odd**-**mode** (The basic theory with mutual and self capacitance!!). Also i've read about ''broadside-cupled lines'' (from ''RF and Microwave coupled line cicuits''), so i have some (...)

RF, Microwave, Antennas and Optics :: 05-21-2012 21:49 :: Turtlemaster :: Replies: **0** :: Views: **529**

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