# Search results

1. ### regarding UWB antenna

Hi, first off all you need to understand the Radiation Boundary you use. The thing you want to simulate is the far field characteristics of your antenna in an infinitly large air box. As this cannot be designed you put the radiation boundary at the end of a finite airbox. This boundary is shall...
2. ### How to set port impedance in HFSS to simulate RFID antenna

I cannot refer to HFSS 10 neigher, but in newer versions there is an option in the port properties to renormalize the port impedance. Anyways, if you tell HFSS to assume a certain impedance at the antenna port, which does not equal the real Z_0 of your design, your simulation might work, but...
3. ### Slotline Simulation in Ansys HFSS

I think they look fine. I attached the Field display as well as the mag(E) at the port. Furthermore I attached the mag(E) field on the slot line.
4. ### Slotline Simulation in Ansys HFSS

Dear all, as I am having some trouble with my antenna design, I started splitting it up in small problems: My very first problem is about designing a slot line and determining it's characteristic impedance Z_0. My simulation is quite easy: I have defined a slot line on a low dielectric...
5. ### HFSS Field Calculator - 2D plot

Now I just found a way to get (at least) something! I stored the expression to calculate the impedance as a named expression in the field calculator without defining the geometry. I created a line element and marked it. Than I did a right click on Field Overlays and picked "Plot Fields --> Named...
6. ### HFSS Field Calculator - 2D plot

Dear all, I'm trying to calculate the impedance along a line as described in the field calculator cook book (rev 091300). In the output section in HFSS v13 I can only find: Value Eval Write... Export... In the cook book there are also the buttons Draw Plot Anim 2D Plot I already typed the...
7. ### Vivaldi antenna feeding: Microstrip to slot line transiton /w marchand balun

Hi all, I'm trying to understand the design process of a microstrip to slotline transition for a vivaldi antenna. The microstrip width at the antenna port can be calculated to meet the desired $Z_0$ value of e.g. 50 Ohms using one of the online microstrip calculators. In my case this is way...
8. ### Which 3D EM Simulator for antennas (UWB, antenna array, nanostructures)

Hello, I'm searching for "the best tool" to design ultra-wideband antennas and antenna arrays with a highly directional response pattern. Possible geometries are e.g. bow-tie, vivaldi or horn antennas. The frequency range to be simulated is DC to 10 GHz. Later I also want to analyze...