zam_nmn
Junior Member level 1
Hello
I am trying to design a simple one port ring resonator filter. I have calculated and simulate the band pass prototype filter using circuit level simulator and now trying to design using HFSS to get the similar result. I am designing a one port ring resonator filter which is 1 wavelength long at 1.8GHz using suspended substrate stripline. However I didn't get similar results as the one using circuit level simulator. The ring resonator resonate at 2.8GHz instead of 1.8GHz. My calculated radius for one wavelength long ring resonator was 26.5mm. I did play around with eigenmode and found that the radius of resonator should be somewhere around 26mm so that it resonate at 1.8GHz. However, when using Driven modal solution and after putting the 50ohm transmission line and considering coupling gap, i didn't get the similar result. I am very lack of experience on this and really want to learn if anyone can help me with this. I really want to know what went wrong with my design. Please find attached of my design and results
View attachment DEGREE ONE.pdfView attachment Tg.pdfView attachment DEGREE ONE TEST 26.5.hfss.zip
I am trying to design a simple one port ring resonator filter. I have calculated and simulate the band pass prototype filter using circuit level simulator and now trying to design using HFSS to get the similar result. I am designing a one port ring resonator filter which is 1 wavelength long at 1.8GHz using suspended substrate stripline. However I didn't get similar results as the one using circuit level simulator. The ring resonator resonate at 2.8GHz instead of 1.8GHz. My calculated radius for one wavelength long ring resonator was 26.5mm. I did play around with eigenmode and found that the radius of resonator should be somewhere around 26mm so that it resonate at 1.8GHz. However, when using Driven modal solution and after putting the 50ohm transmission line and considering coupling gap, i didn't get the similar result. I am very lack of experience on this and really want to learn if anyone can help me with this. I really want to know what went wrong with my design. Please find attached of my design and results
View attachment DEGREE ONE.pdfView attachment Tg.pdfView attachment DEGREE ONE TEST 26.5.hfss.zip