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Lukas Henkel

@QVHenkel • 25,530 subscribers

All things 3D | Rendering | Simulation | Electronics | StartUp | CEO engineering services company - views are my own

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It's mesmerising to look at. I did a simulation of this a while ago

It's mesmerising to look at. I did a simulation of this a while ago

354,826 views

I've set up a simulation of a Rotman lens to drive a phased array in Elmer. The matching of the ports is poor, causing lots of internal reflections, resulting in unwanted side lobes and poor channel separation. Nonetheless I think it still demonstrates the principle nicely 😊

I've set up a simulation of a Rotman lens to drive a phased array in Elmer. The matching of the ports is poor, causing lots of internal reflections, resulting in unwanted side lobes and poor channel separation. Nonetheless I think it still demonstrates the principle nicely 😊

974,935 views

The radiation pattern does not look pretty (yet) but it looks like using the speaker port as antenna might be feasible

The radiation pattern does not look pretty (yet) but it looks like using the speaker port as antenna might be feasible

100,972 views

In case you ever wanted to see a visualization of the field in a microstrip filter 😄

In case you ever wanted to see a visualization of the field in a microstrip filter 😄

96,127 views

the simulation shows the separate resonant modes of the dual band niche antenna on the CM4 module

the simulation shows the separate resonant modes of the dual band niche antenna on the CM4 module

137,872 views

Another look at the internal structure of the open-source smartwatch. In the slideshow the design looks deceptively simple considering the number of components in the watch 😅

Another look at the internal structure of the open-source smartwatch. In the slideshow the design looks deceptively simple considering the number of components in the watch 😅

39,719 views

I wanted to see where the hotspots in my ultrasonic cleaner are and which water levels to avoid to get the most even pressure distribution 😄

I wanted to see where the hotspots in my ultrasonic cleaner are and which water levels to avoid to get the most even pressure distribution 😄

46,602 views

A visualisation of different velocity factors in a PCB. Both simulations use the same excitation and port parameters. Only the permittivity is different, showing how the signal travels much faster in low Dk dielectrics. This simulation shows an embedded trace. A signal on an outer layer also travels faster because part of the EM field propagates through air, which has a Dk very close to 1

A visualisation of different velocity factors in a PCB. Both simulations use the same excitation and port parameters. Only the permittivity is different, showing how the signal travels much faster in low Dk dielectrics. This simulation shows an embedded trace. A signal on an outer layer also travels faster because part of the EM field propagates through air, which has a Dk very close to 1

35,256 views

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On many high-speed designs it is necessary to have a ground-plane void underneath large pads to minimize the local impedance dip. I´ve used GPT-6 to create a script that reads the layerstack information through the Altium PCB API, isolate the target net- and pad class, creates an openEMS simulation, run the simulation to find the pad void size that does not create an impedance dip compared to the trace that is attached to the pad and ultimately apply the calculated GND void expansion value to all pads in a user-defined net class. Currently all pads still receive the same expansion value. I will port the setup to use palace EM in order to automatically solve the expansion values for all different pad sizes/shapes in parallel which should be much faster than openEMS.

On many high-speed designs it is necessary to have a ground-plane void underneath large pads to minimize the local impedance dip. I´ve used GPT-6 to create a script that reads the layerstack information through the Altium PCB API, isolate the target net- and pad class, creates an openEMS simulation, run the simulation to find the pad void size that does not create an impedance dip compared to the trace that is attached to the pad and ultimately apply the calculated GND void expansion value to all pads in a user-defined net class. Currently all pads still receive the same expansion value. I will port the setup to use palace EM in order to automatically solve the expansion values for all different pad sizes/shapes in parallel which should be much faster than openEMS.

39,693 views • 1 month ago

A different view with a surface between the ground plane and filter structure warped only by the Z component of the e-field to make the visualization a bit cleaner

A different view with a surface between the ground plane and filter structure warped only by the Z component of the e-field to make the visualization a bit cleaner

29,949 views • 7 months ago

I´m experimenting with using ultrasonic surface waves on the trackpad of the laptop project to enable multi-touch haptic feedback. This should make it possible to generate haptic feedback under individual fingers for multi-touch gestures. Elmer FEM software is a really helpful tool to model the interface between the piezo elements and the coverglass as well as the wave propagation. Best of all it is open-source 😁

I´m experimenting with using ultrasonic surface waves on the trackpad of the laptop project to enable multi-touch haptic feedback. This should make it possible to generate haptic feedback under individual fingers for multi-touch gestures. Elmer FEM software is a really helpful tool to model the interface between the piezo elements and the coverglass as well as the wave propagation. Best of all it is open-source 😁

42,320 views • 2 years ago

Some chip manufacturers use selectively depopulated BGAs, but do not provide pin coordinates that can be conveniently imported. For such cases I like to use a transparent always-on-top overlay of the datasheet. It's worked great so far, but I'm still wondering if there's an easier way.

Some chip manufacturers use selectively depopulated BGAs, but do not provide pin coordinates that can be conveniently imported. For such cases I like to use a transparent always-on-top overlay of the datasheet. It's worked great so far, but I'm still wondering if there's an easier way.

19,319 views • 1 year ago

Running the Yocto image on the open-source PiMX8 module. The Piunora is a nice compact CM4 baseboard, quite handy for testing.

Running the Yocto image on the open-source PiMX8 module. The Piunora is a nice compact CM4 baseboard, quite handy for testing.

17,915 views • 1 year ago

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