Hal Murray wrote: >> My Panasonic VIC100 antenna had a few screws to hold the bottom to the >> plastic cone top. The bottom had an o-ring seal that stuck a little >> but was still pretty easy to slide the bottom from the top half. >> Inside was a patch antenna on top of a pcb. >> > > Thanks. I tried again and it came apart easily. There is an O-ring but no > glue. (I wonder why I didn't get it the first try.) > > The antenna isn't a patch. (Or I don't recognize it as such.) > > It's a cylinder, 2 inches tall, 3/4 inch in dia, sticking up over a 2 inch > square PCB that's screwed into an aluminum base place. > > It's made of flexible PCB material wrapped around to make a cylinder. The > outside bottom 3/4 inch is a plane. There is an obvious solder joint line > closing the plane. The inside top has 4 fingers spiraling around at 45 > degrees. The lower inside part (opposite the plane) has some wiggles in some > traces, but I haven't figured out the equivalent circuit. > > > Thats a quadrifilar helix antenna.
bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.