![]() ![]() ![]() But, given the simulation time and attention to detail required to getting a mesh designed in openEMS, it might be quite an effort. Soon, l plan to export from Kicad to HyperLynx for the actual pcb design. Electronics & PCB Design Apps Altium Designer Is a Printed Circuit Board (PCB) design software, Power Delivery. With a parameterized antenna geometry and (parameterized) placement, one can quickly gain insight into important considerations. Then I created a simple script to grab the xy coordinates and create the openEMS commands required to generate the polygon in that environment. I used excel to define a polygon with a scattergram that showed the poly as it was being "drawn" by entering formulas in cells. It's really pretty simple for pcb antennas. I found it much better to do a parameterized design. I got a decent workflow from that, but I soon got tired of drawing slightly varying MIFA designs. I spent time trying to get antenna layouts done in Kicad into openEMS. Altium Designer, LTspice, Qucs, Sonnet, AWR Microwave Office, Fusion 360. I went down a "rabbit hole" I'd advise others to avoid. Digital and Analogue Hardware Design, Antenna design, Micro strip filter. GHz Microstrip Patch Antenna Design using CST 2019 (Part 1). I'm glad I bothered to do simulations! I was really surprised how sensitive results were to things like where the feed element egressed from the ground plane. Qucs, also known as Quite Universal Circuit Simulator, is a. It was more time-consuming to get reasonable results than I expected, but I'm now able to reproduce simulation results I see in online app notes. Thanks for the advice! I dug into openEMS. You can export the S11 from OpenEMS and import that as a Touchstone file into QUCS to simulate the quality of your match. This is better and faster in another package. If you plan on using a matching network, you don't need S11 to be perfect, but the closer to 50ohms you get the easier and wider band the matching network will be. Creating the mesh is everything in OpenEMS. Once you have the basic OpenEMS model running, adding some simplified version of the enclosure is a worthwhile step. Enclosures can easily detune the antenna. You can add basic PEC blocks for cans and other components, but I doubt they make much difference if separated slightly from the IFA. This will make it simpler to simulate as you can just model the PCB as a solid PEC sheets. When you design your PCB, make sure you have a nice solid ground and power plane. QUCS for Filter Design Introduction QUCS, or Q uite U niversal C ircuit S imulator, is a freeware utility that allows you to draw circuit schematics, and perform AC & DC simulation, noise simulation (for S-parameters, and AC simulations), S-parameter simulation, and a whole lot more upon them. It takes a little while to get used to, but you can get the tutorial examples up and running in no time. I use openEMS all the time and would say it's definitely a helpful tool for your task. ![]()
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