Dual band gap resonator design question

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Discussion Overview

The discussion centers around the design of a dual band gap resonator, specifically addressing the challenge of achieving resonance at two different frequencies within a resonator structure that currently only resonates at one frequency. Participants explore various approaches to modify the existing design to accommodate dual resonance.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Experimental/applied

Main Points Raised

  • One participant inquires about methods to achieve dual resonance, questioning whether the goal is to attenuate two frequencies or preserve them while affecting the broader spectrum.
  • Another suggests placing an additional resonator alongside the existing one, proposing that the current resonator be designated for lower frequencies and the new one for higher frequencies, while noting the need for experimentation with spacing.
  • A participant requests a drawing to illustrate how to integrate another resonator into the existing structure without causing interference.
  • One participant reports that they have developed a method based on earlier suggestions but faces challenges with the strength of resonance at different frequencies, specifically noting that the 5GHz resonance is significantly weaker than the 3GHz resonance.
  • There is a question raised about increasing the coupling of the 5GHz resonance without increasing its thickness, indicating a potential limitation in design parameters.

Areas of Agreement / Disagreement

Participants express various ideas and approaches to achieve dual resonance, but there is no consensus on the best method or solution. The discussion remains unresolved regarding the effectiveness of the proposed strategies and the specific challenges faced.

Contextual Notes

Participants mention specific design parameters, such as the length of the strip line affecting resonance frequency, and the need for careful consideration of resonator configurations. There are unresolved questions about the impact of thickness on resonance strength and coupling.

yefj
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Hello , I have built a gap resonator which is resonant only in one frequency.Is there a way I can make a dual resonance with such structure or similar?
So I will have a resonance at lower frequencies.
Thanks.
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yefj said:
Is there a way i can make a dual resonance with such structure or similar?
Are you looking to attenuate two frequencies, while preserving the broader spectrum? Or are you looking to preserve two frequencies, while attenuating the broader spectrum?

You need to define your resonators as either one or two port devices.
A one port resonator connects the port to ground through the resonator.
A two port resonator connects the resonator between the two ports.

What is the "band" gap resonator in the title?
 
yefj said:
Hello , I have built a gap resonator which is resonant only in one frequency.Is there a way I can make a dual resonance with such structure or similar?
So I will have a resonance at lower frequencies.
Thanks.
View attachment 358012
View attachment 358013
I think the easiest way is to simply place another resonator alongside the present one. It would be better to make the present one the low frequency resonator and the new one the higher, so that the lengths can be accommodated. You might need to experiment with the spacing.
 
Hello Tech99, My gap resonance freuqency is desided by the length of the strip line as shown below.
Could you draw How can I put another resonator in this structure so it minimally interfer with the original gap resonator?

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I have attached a drawing showing a possible method.
 

Attachments

tech99 said:
I have attached a drawing showing a possible method.
So y'all don't have to download the pdf:
1741023978377.png
 
Hello Tech99, The Idea is great . I have devoloped it .Its hard to describe a situation on photos . So I made a video describing the situation.basically I got the situiation where one line resonance is much much stronger then the resonancwe of the other line,I needed to maje the 5Ghz line to be thicker in order to make it stonger.
Why the 5Ghz is so weak while 3Ghz gap is so strong.I was told that I cant make the 5Ghz so thick.
Is there a way to increase the coupling of the 5GHz whithout increasing thickness?
link of a video Video and photos are attached.
2025-03-25 15-24-07.mkv

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