Machining mmWave Radar Rotary Couplers at 122 GHz

Machining a tiny waveguide coupler to connect a millimetre-wave 122 GHz Radar chip to equipment and antennas fitted with waveguide flanges, whilst allowing free rotation during cavity size adjustment. Made in a manual machine shop.

Lots of precision machining to create a UG-387/U mmWave waveguide flange and 2mm diameter waveguide guide on my Colchester lathe and Bridgeport milling machine. As usual, there's lots of "help" from my AI assistant Aimee, mostly pointing out my inadequacies as a machinist so the trolls don't need to bother. Marvellous.

The design of the coupler is based on those by Andrew Alexander VK3CV to fit the Silicon Radar TRA120 mmwave chips with antennas integrated on to the device substrate.

Feeds and speeds for the brass machining section: 900 rpm using the variable speed 3 phase inverter, feed 0.17 mm per rev, CZ121 bar. Insert is a YG-1 CCGT120408--AK-H01 from Cutwel https://www.cutwel.co.uk/ccgt120408-ak-h01-finishing-carbide-turning-inserts-korloy

Rewind button image by https://pixabay.com/users/maklay62-182851/
Rocket image from https://pixabay.com/users/clker-free-vector-images-3736/
Arrow from https://pixabay.com/users/mireyaqh-1508748/
Corncob track is licenced to Youtube
Till with bell by https://freesound.org/people/Benboncan/sounds/91924/

Contents:
00:00 Why and How?
03:22 Long drill time
12:14 Lots of parts
12:30 Threads and Dowels
19:34 Assembly

Видео Machining mmWave Radar Rotary Couplers at 122 GHz канала Machining and Microwaves