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Antenna Calculator: fix out-of-range handling + add Comet W100RX (#3321)

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* Antenna Calculator: handle out-of-range frequencies

Fix an out-of-bounds read in update_result(): when the required
quarter-wave length was shorter than the fully-collapsed antenna, the
element interpolation indexed elements[-1]. Guard the frequency range and
report 'retracted' (above the fundamental range; a wideband RX whip still
receives here via harmonics) or 'fully ext.' (below range) instead of a
garbage element count.

* Add Comet W100RX to the sample WHIPCALC/ANTENNAS.TXT

Comet W100RX telescopic RX whip, segment lengths (mm) from the Comet
W100RX instruction sheet: 200/300/400/510/615/800/986.
This commit is contained in:
Mo
2026-09-16 18:30:36 +02:00
committed by GitHub
parent 60b5cc8832
commit 59fb74be1d
2 changed files with 22 additions and 1 deletions
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sdcard/WHIPCALC/ANTENNAS.TXT
+2 -1
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@@ -1,4 +1,5 @@
#antenna label,elements length in mm, separated by a commas
ANT700,95,134,175,206,230,245
ANT500,185,315,450,586,724,862
Cheap 11cm,118,183,253,326,399,476
Cheap 11cm,118,183,253,326,399,476
Comet W100RX,200,300,400,510,615,800,986