The usual configuration for a pipe-cap filter is sketched in Figure 1: a metal plate shorting the open end, with probes for inpu
EA4EOZ, an amateur radio electronic enthusiast: Pipe cap filters for 10GHz
Steve on Twitter: "Today I've been experimenting with a QO-100 QRP TX strip. This included a first attempt at making a Pipe-Cap filter. Initial tests confirm it does actually tune to 2.4GHz!
EA4EOZ, an amateur radio electronic enthusiast: Pipe cap filters for 10GHz
Microwave_Pipecap_Filter_WA5VJB.gif
Pipe Caps Filters for Microwave Rigs - KO4BB
Steve on Twitter: "Today I've been experimenting with a QO-100 QRP TX strip. This included a first attempt at making a Pipe-Cap filter. Initial tests confirm it does actually tune to 2.4GHz!