ceramic antenna manufacture - Page 1
Forum section: electronics / rf-microwave

author: coppercone2
author_rank: Super Contributor
timestamp: October 11, 2024, 01:24:15 pm
content: I have multiple ways of metalizing ceramic that I have been experimenting with.One component that began to interest me is the ceramic antenna.It seems that if you can metalize a ceramic, you can make an antennaI did however remember something, that is SLCC disk caps, are high K ceramic that is metalized.I was wondering about etching a SLCC disc capacitor into a antenna. Is this feasible ? Simply apply photomask to SLCC and etch.Furthermore, does anyone know of a place that sells high K dielectric substrates that is easier then china vendor negotiations?

author: Bryn
author_rank: Regular Contributor
timestamp: October 11, 2024, 01:34:39 pm
content: Kyocera would be your best bet when it comes to ceramics.

author: coppercone2
author_rank: Super Contributor
timestamp: October 11, 2024, 02:47:44 pm
content: they might talk to me if I buy out toshiba

author: Bryn
author_rank: Regular Contributor
timestamp: October 11, 2024, 03:17:02 pm
content: How would they?By the way, ATMI would sell what you're looking as well (but they're based in Burnet, Texas). If you happen to be out of reach from there, local electronic suppliers may sell them.

author: coppercone2
author_rank: Super Contributor
timestamp: October 11, 2024, 03:44:09 pm
content: they would really sell me small samples of dielectric ceramic in low quantity for messing around with a small prototype?These companies sound like they don't even respond unless you have a B2B team

author: temperance
author_rank: Super Contributor
timestamp: October 11, 2024, 03:52:46 pm
content: You can try some aluminum oxide insulators for TO220, TO247 to experiment with.

author: coppercone2
author_rank: Super Contributor
timestamp: October 11, 2024, 04:24:18 pm
content: I have that but its hardly high K dielectric.That might be a useful experimental controleven a class 1 capacitor ceramic has 5x higher dielectric effectA class 3 has a K of many thousands

author: LaserSteve
author_rank: Super Contributor
timestamp: October 11, 2024, 06:25:02 pm
content: He chances his user name every once in a while, but Advancer42 or Advanced Ceramic Esoterica on fleabay is your friend. :-)Steve

author: coppercone2
author_rank: Super Contributor
timestamp: October 11, 2024, 11:24:31 pm
content: hmm... drill a cut slcc for high k helix, soldering little tube vias !might be time to order those swiss diamond bits finallyI wonder too how much the continuity of the substrate has, if you glue them together edge wise. its not exactly a conductor? however, its fragilebut it might make ceramic antennas of unusual size accessibleor just strips along the edge to make a helix without drilling! I think you can get preform copper with tin of substantial thickness on it for very precise 'lap' soldering even on small structures. I wonder if you can do edge metalization like that under a microscope, just using a electrically heated micro resistance soldering iron (micro lapflow tool)cut very fine strips and then roll them flatfascinating, if you can turn 1950's 'unwanted' passives into micro sized microwave components potentiallyI am also wondering about scribing, if for simple structures you can get a more advanced "photomask" made mechanically with a scribe for a simple structure, using something like a linear rail, instead of trying to do photo exposure. I guess it generally applies to simple designs of all kinds. 0.001 inch scribe lines? I imagined a tool like a chisel-needle. hmm, made from a carbide insert or tool steel needle. I need to try under a microscope and one of my positioners. For simple stuff like a planar microwave coil.

author: coppercone2
author_rank: Super Contributor
timestamp: October 15, 2024, 09:33:13 pm
content: I want raw capacitor materials too.

author: coppercone2
author_rank: Super Contributor
timestamp: October 17, 2024, 03:50:20 am
content: Any idea how to get the coating off these ceramic disk capacitors?I guess I got lucky before when I had a bare one that must have developed a crack in just the right place. My current attempt lead to the capacitor material cracking.Is it enamel? I wanted a bare one to experiment on. If I try to crack it off, the metalization comes off.Maybe heat might work?Am I going to have to try to sand these damn things? ughMaybe surface mount capacitors are a better bet? I see they sell SLCC surface mount capacitors, they call it "epoxy". Might this mean its a epoxy dip coating?Or some kinda bare ones for special purposes?Anyone know of a better source?

author: Hamelec
author_rank: Regular Contributor
timestamp: October 17, 2024, 07:46:26 am
content: I think ceramic with a high K ceramic also having a high temperature coefficient, thats not what you want..why not using RT/duroid 6006 and 6010? to easy?

author: coppercone2
author_rank: Super Contributor
timestamp: October 17, 2024, 01:34:00 pm
content: Not quite as exciting as taking a old capacitor and turning it into a modern antenna and it has nothing to do with my recently effort put into learning ceramicskind of like the tendency of the forum to try to make people feel bad for not buying PCBs from china, some people are going on a trip some people are traveling to a destination