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Hello there,
I have attached my design files here with both circuit model and HFSS model. Load impedance is set as 70+50i and expecting input impedance same which I obtained in cicruit model. I am designing lambda/2 line with 50 ohms impedance and waveports are used. Input impedance in HFSS is...
Thank you so much for the guidance and observing phase S21 to verify if designed transmission line is lambda/2 is a great idea. I designed the wave port accordingly. The S21 phase is around 178 degree and input impedance seems to be little off which I believe is related to thickness of PEC...
I designed 50 ohms lambda/2 microstrip line and wanted to verify if it is exactly lambda/2 and 50 ohms line or find what losses might be there by looking into complex load impedance since the Zin should equals to ZL if it is lambda/2 line. However, when I did it in circuit simulation it is...
Yeah that was connecting two grounding plane together and assigning lumped port in between. However, I changed the structure and put it inside. I have attached screenshot of whole design and port connection here. The port used is lumped port. The length and width of the port are equal to width...
Please find the attached screenshot for the zoomed version of port which is similar in other end with lumped RLC element. I did two port simulation as well and calculated input impedance using relation
zin=z11-(z12*z21)/(z22+zl); where Zl=50 ohms from second port. However, it is also not giving...
Yes, I am using exact same width and spacing in HFSS like ADS. Screenshot attached; In HFSS for now to make it more simpler I am using rectangular sheet (0 thickness and perfect conductor). Do you think this is making difference? Yes, I understand 0.05mm spacing is not possible in PCB...
Thank you for the reply. The transmission line is designed for 50 ohm. Please find the attached screenshot. However, I am not getting the constant 50 ohm impedance for overall frequency.
Hello Tony,
Thank you for the reply. Actually, I am trying to simulate for CPW transmission line instead of grounded CPW for my work. I have attached the screenshot of calculation for CPW here as I am limited to use 0.05mm gap between the signal and ground pour. Based on mathematics if...
Hello Everyone,
I am designing single port (50 ohms) coplanar waveguide of 50 ohms in HFSS which is connected to other end with 50 ohm lumped RLC component. The width and spacing of the waveguide is 0.412733mm and 0.05mm respectively in FR4_epoxy substrate (er=4.4). Since characteristic...
Thank you everyone. I found my mistake. I was connecting two port each of 50 ohms and looking for Z(1,1) which I realized later it is not input impedance for two port network. When I changed second port to Lumped RLC, it worked, I can see almost 50 ohms in all the frequency sweep.
Hello,
I am designing a 50 ohm, lambda/2 microstrip line with two lumped ports each of 50 ohm in HFSS using FR4_epoxy (relative permittivity=4.4) substrate of 1.67mm thick at 1.5GHz. The width and length of the microstrip line is calculated using ADS linecalc method which is obtained to be...
Hello,
I am designing antenna but there is an error in the port mentioning "port refinement, process hf3d error: mesh segments could not be obtained for an edge of terminal signal_pin_t1 assigned to port 1.." I could not find the error related to it. I highly appreciate the help to debug the...
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