The first picture shows the unit with the 8.5 x 6.5 cm single-sided PCB ground plane attached with double-sided tape. It definitely helped make indoors reception in my shack much more reliable. In addition to the improved conditions for the patch antenna, it probably helps too that the antenna now is shielded from the digital circuitry of the GPS module, the 10 MHz pulse shaper, and the USB interface. I also added a small LED to the right so that I could see from the outside whether the GPS locks properly.
The second picture shows the interior prior to adding the ground plane.
- Just good enough 10 MHz reference (3 Oct 2015)
- Better with SMA (15 Oct 2015)
- Curing amnesia in the 10 MHz GPS reference (19 Nov 2015)