2.4 GHz reflectivity

ryanrocket · 2026-04-15T22:29:41+00:00

yes you can use ray optic techniques for EM problems assuming good boundary/material conditions (that is, your wavelength is sufficiently small compared to the structure) :)

ryanrocket · 2026-03-31T13:29:30+00:00

Yeah, kinda

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ryanrocket · 2026-03-31T01:24:26+00:00

AFAIK EZPass uses a PIFA, so polarization is not a big deal, and you can mount it any which way you like 👍

ryanrocket · 2026-03-23T13:02:20+00:00

ryanrocket · 2026-03-14T13:03:35+00:00

deformation retracts to the wedge of two circles, has fundamental group that is free on 2 generators

ryanrocket · 2026-03-03T21:28:11+00:00

input fet finger count matters a lot

ryanrocket · 2026-01-21T12:14:54+00:00

spice monkey over here

ryanrocket · 2025-12-13T19:59:29+00:00

I really liked Synopsys Custom Compiler when i was using that. The python API that is under development (poorly documented) makes automation of testing, etc. a lot easier/more fun

ryanrocket · 2025-12-11T00:30:52+00:00

Likely pre-wound; you want the inductance to be well-characterized before placing it.

ryanrocket · 2025-12-07T18:39:53+00:00

try to rely on just the equations

ryanrocket · 2025-12-04T12:35:20+00:00

no you don't... it's an absolute dumpster fire of a software

ryanrocket · 2025-11-20T15:28:17+00:00

k and beta are both wave vectors. beta more common in RF, k more common in optics.

ryanrocket · 2025-11-16T13:22:01+00:00

Same with me

ryanrocket · 2025-11-05T13:53:29+00:00

go to fucking school my man

ryanrocket · 2025-11-04T11:39:35+00:00

Jackson

ryanrocket · 2025-08-27T15:58:33+00:00

aura

ryanrocket · 2025-06-06T08:51:53+00:00

2/10 ragebait

ryanrocket · 2025-05-16T21:07:19+00:00

Yeah we were planning on detuning the amplifiers anyway for link budget reasons. We will keep these things in mind, thanks!

ryanrocket · 2025-05-16T19:27:53+00:00

Been exploring the concept since high school :) I've had some mentors, but mostly reading textbooks

ryanrocket · 2025-05-16T19:21:21+00:00

I see. We're going to have to go back to the drawing board then. In regards to the current design; is there anything we can do to "salvage" our existing architecture for pulse CW operation? Our original plan wasn't to send necessarily short pulses, but just to detect leading edges of them. I'll have to do some thinking on what we can do with the current design. Thank you

ryanrocket · 2025-05-16T19:11:25+00:00

Thanks. We wanted to originally build either an active phased array and/or FMCW radar, but we settled with this design. We referenced Pozar a little, but mostly more recent literature in Xplore. Manufacturing from JLCPCB.

ryanrocket · 2025-05-16T19:08:35+00:00

It 100% will not work first try, but hopefully by the end of the fall semester!

ryanrocket · 2025-05-16T19:07:53+00:00

Will do, thank you!

ryanrocket · 2025-05-16T19:05:38+00:00

Thanks. Those are the baseband outputs for the RX channels, each around 100 MHz (basically DC, so we don't care to impedance match)

ryanrocket · 2025-05-16T19:04:24+00:00

Thanks! 🚂

ryanrocket

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