https://kjen.dk/web/ 2026-05-05T01:20:18+00:00 https://kjen.dk/web/ https://kjen.dk/web/lib/tpl/ramtop/images/favicon.ico text/html 2016-12-19T14:25:45+00:00 Anonymous (anonymous@undisclosed.example.com) https://kjen.dk/web/navigation_gps/antenna_signal_splitter_reactance_plot?rev=1482157545&do=diff Python code for generating the reactance plot: from math import pi from pylab import * def reactance (f, C): return 1./(2.*pi*f*C) L1 = 1575.42*10**6 L2 = 1227.60*10**6 capacitance = list ((c+1) for c in range (150)) L1_reactance = list (reactance(L1, c*0.000000000001) for c in capacitance) L2_reactance = list (reactance(L2, c*0.000000000001) for c in capacitance) plot(capacitance, L1_reactance,'r', label='L1 (1575.42 Mhz)') plot(capacitance, L2_reactance,'g', label='L2 (1227.60 MHz)') … text/html 2022-03-24T06:45:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://kjen.dk/web/navigation_gps/gps_antenna_signal_splitter?rev=1648104313&do=diff For a project at the university I needed an antenna signal splitter to share the signal from a single GPS antenna between up to three GPS receivers. I found a few commercial products available but decided it would be much more fun and learning to build it myself.