How to find Resonance frequency of rectangualr cavity from FDTD data

Click For Summary
SUMMARY

The discussion focuses on calculating the resonance frequency of a rectangular cavity using 3D Finite-Difference Time-Domain (FDTD) data. The user has developed a 3D FDTD code with Mur Absorbing Boundary Conditions (ABC) that produces accurate time-domain results. To determine the resonance frequency, it is recommended to utilize a chirp pulse or white noise as input and apply Fast Fourier Transform (FFT) on the output data. This method is noted for its efficiency and is commonly employed in SPICE simulations.

PREREQUISITES
  • Understanding of 3D Finite-Difference Time-Domain (FDTD) simulation techniques
  • Familiarity with Mur Absorbing Boundary Conditions (ABC)
  • Knowledge of Fast Fourier Transform (FFT) algorithms
  • Basic principles of resonance frequency in electromagnetic cavities
NEXT STEPS
  • Implement a chirp pulse input in your 3D FDTD code
  • Learn how to apply Fast Fourier Transform (FFT) to time-domain data
  • Research methods for analyzing resonance frequency in electromagnetic simulations
  • Explore SPICE simulation techniques for frequency response analysis
USEFUL FOR

Electromagnetic engineers, simulation developers, and researchers interested in resonance frequency analysis of rectangular cavities using FDTD methods.

confi999
Messages
18
Reaction score
0
Hello,
I have written 3D FDTD code with Mur ABC which gives correct results for time domain data.
Now I want to compute the resonance frequency of a rectangular cavity using this 3D FDTD code.
I don't know how I will do that.

Would someone please advise me the steps I need to follow now to calculate the rectangular cavity resonance frequency.
Any code or help on how the time domain data need to be processed is highly appreciated. Thank you.
 
Engineering news on Phys.org
Maybe this is a silly suggestion, but could you just use a chirp pulse (or even white noise) as an input and then use an FFT on the output?

I can't think of a better method right now, of course you could just "scan" across frequencies and look at the amplitude of the output; but chirp+FFT should be faster, and I believe this is how it is usually done in e.g. SPICE simulations.
 

Similar threads

Finding the resonant frequency of this "discriminator" demod circuit.
  • · Replies 2 ·
Replies
2
Views
3K
How Does Resonance Frequency Affect MEMS Accelerometer Performance?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Accounting for Astigmatism in Bow Tie Cavity: Finding the Optimal Cavity Length
  • · Replies 9 ·
Replies
9
Views
3K
Help with understanding of RF theory-Kinetic inductance parametric amp
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Fundamental frequency of a rectangular-cavity whistle
  • · Replies 1 ·
Replies
1
Views
3K
Acoustic Resonance in Fluid-Filled Cavities
  • · Replies 1 ·
Replies
1
Views
2K
Alternatives to creeping contacts for high frequencies
  • · Replies 37 ·
2
Replies
37
Views
7K
Graduate Vibrations in a bow-tie cavity
  • · Replies 16 ·
Replies
16
Views
3K
Sending drive Pulse in CQED and visualize the state by QuTip
  • · Replies 6 ·
Replies
6
Views
4K
High School How Many Layers of Aluminum Foil Are Needed for a Resonant Cavity?
  • · Replies 8 ·
Replies
8
Views
2K