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28 Threads found on edaboard.com: Internal Wave Port
I usually only used lumped port when analysing an internal impedance in the structure. waveguide ports are the one to use on CPW, but you have to take care to define the dimension of the port correct. Make sure that you only propagate CPW mode form the port and not other strange (...)
Hi All, I got some problems on size of coaxial wave port. Since i am simulated planar antenna which i am using wave port to be touched with my feed point of antenna, although the result of simulation shows me a good size, however, i wondered how large the coaxial wave port should i use. (...)
ok, 1st possibility: the wave port is inside the airbox. The simulation rule is to draw a very thin PEC brick and assign the port to the PEC brick face touching the antenna (looks to be fed with a cpw, isn't it?). PEC is a 'non-solve inside' material in HFSS. waveports must be placed between a 'non-solve (...)
I am using HFSS I believe I've made my wave port correctly based on previous answered post, yet I keep getting the error message "p1 is assigned to an internal face". I understand that it thinks my port is "inside" my design, but I'm confused if it really is. For my antenna design, I ran the traces for 5 GCPW lines to (...)
Hey, I'm trying to design a fractal patch antenna. The patch is fed by a direct-connected probe. However, on running the design, I get the following error message: port refinement, process hf3d error: port 1 is assigned to an internal face. Only allowed with lumped ports.. Simulation completed with execution (...)
Hi I am a new guy to use HFSS. Now I am going to excite the mode in the waveguide (more like cavity). But it turns out that some localized mode can not be excited by the normal wave port. But I am not familiar with the internal lumped port. Could anyone help me with that. I think the best is some example (...)
Hello guys, I am trying to simulate Inverted- F antenna by using SMA connector as the feeding. But the error happen: port refinement, process hf3d error: port waveport1 is assigned to an internal face. Only allowed with lumped ports.. Could you help me to solve this problem? I have (...)
I simulated s parameters of a two-port PEC wave guiding structure. I tried four different cases: case 1: wave ports were used. Results OK. Case 2: I used PEC 'cap' to cover the ports, and used wave ports. Results OK. Case 3: The whole structure was put into an large (...)
"as far as I know my calculations for p@tch dimensions are correct"=>did you use some simple formula to calculate the dimension for the patch so that it "should/would" resonate at 10GHz? If so, then cosider that there are various assumptions involved with the formula. for example, the loading effect of the feed is not accounted for; fringing effect
If you want to use Ensemble, I am sure you can find an internal port. All Planar EM simulators have this kind of port. I hope this can help.
I've created a coaxial feed with internal conductor connected to the monopole and calculated to have 50 Ohm as carachteristic impedance. Then I've tested waveport and lumped port at the coax entry and I've obtained the same results. I've looked at S11 and Zin and they are very similar. Also the Zin=36 Ohm about and this (...)
if not wrong , when supplied from factory most of the avr's are set to internal rc oscillator and Bjorn is right saying that avr's fuses you use is set to external crystal oscillator.
jiaping: The reference impedance simply means the internal impedance you want for the port for S-parameters. Usually, we just use 50 ohms, but HFSS apparently allows you to set any other termination you want. The impedance is usually an ideal lumped impedance that is co-located with the lumped port. Therefore, it is usually on the (...)
Hello, The attachment is a tutorial about port selection in HFSS.The use of wave ports as internal ports is described at page7.Two questions I would like to ask are: How shoud I create a conducting cap?Just do it like other solid model? How large the cap should be? Thanks.
the Lumped port is seemed as an internal port by the simulator, it's better to have a short return pass between them. I don't have much experience for using the waveport. as to Transmission line, if it is matched, the s11 shoud be very samll and the insertion loss S12 should be large(near zero) I (...)
your better to use a 4mhz crystal and a set of nop also connect up and down so you can trim the output time nop is dependent on the external or even internal oscillator a pic 84 nop lenght is 4/4 in us = 1 so each nop{no operation} is 1us this way you can have it accurate to 1us easy... or 1 millionth part with pic877 @ 20mhz to 200ns
Hi Saquib, conventional CPWs can be fed with either wave ports or lumped ports. Lumped port are more suitable when you need internal ports. In such a case, lump.ports have to be square, with the sides having the same width of CPW signal line. The port must (...)
Hi, I'm working in a project of a high-power combiner (50KW) and I need to simulate this combiner, but I can't create a wave port internal to the model. How you can see, the in-port have a square form. I tried put a cylinder to connect the square face to the out-port (and matching 50ohms), but the (...)
Hi! I think the problem is in the coax feed design. When you create a coax you should follow this procedure: 1)create cilinder with diameter of coax and assign material teflon 2)create vacum cilinder with internal conductor diameter: this cilinder must be coaxial with the one creates before (same position) 3)substract cilinder created at step
--> which power is this talking about spectre -h port "... However, the amplitude of the sine wave in the transient and PAC analyses can alternatively be specified as the power in dBm delivered by the port when terminated with the reference resistance. ..." HOW is this voltag
internal block diagram of VNA is given in Microwave Engineering by Pozar. But enough explanation is given in the book. I am attaching the block diagram. If you can figure out, explain to everybody.
Hi Guys, I am using a substrate which is circular in shape in CST. The end of the TX lines has to be connected on to a wave guide port, but since I am using a circular substrate I cant use it, since freq domain solver does not support internal ports. Could you suggest me a way to simulate it ?
Dear all, I am using a probe feed antenna. Could you please let me know how to set the wave port with a cap. I tried w/o cap but error is port refinement error that port is internal to the structure . Thanks and regards Prakash
hello Y, the best way to simulate an excitation in HFSS is following this simple rule: if the excitation is external to the device(or in some of the edges), you have to use waveport, you have to define a 2d area with suiable dimensions and assign the waveport definition. If the excitation is internal to (...)
if i did it your way then i can divide the frequency which is applied into any pin in any port but what i want is to divide the frequncy using the MCU's internal COUNTER meanning to determine the mode and the constant ..... etc did i made my self clear now TheSniper(+)
Hello everyone! just wondering if anyone has any ideas and/or examples on how to output an adjustable square wave in the range of 6hz-800hz using a pic16f818 running 8Mhz with the internal clock... Im using assembly Thanks! -Ryan
Si4136 doesn't have an internal oscillator, where you can just attach a crystal to oscillate. The chip requires an external clock oscillator, and XIN pin is the clock input (AC coupled).
He pin-pointed the issue with use of 'internal' port in the circuit. This port being uncalibrated, contains inductive parasitics. This led to inconsistent results. That's actually true for most uncalibrated lumped ports in 3D EM: they introduce a thin current path that depends on meshing. Refining the mesh will cha