Antentop is FREE e-magazine
devoted to Antennas and Amateur Radio an

Special page devoted to

Multirange Trap Antennas

Custom Search

ANTENTOP-
02- 2004, # 006

Multirange
Trap Antennas

Current
Distribution at 10 meters

Current
Distribution at 15 meters

Figure
2 Antenna WA1LNQ

Diagram
Directivity and Input Impedance at 10 meters W1LNQ Antenna

MMANA
(MININEC based). Section A has diameter of 24 millimeters,
section B has diameter of 18 millimeters.

Antenna
input impedance. Vertical Trap antenna: You can see
that only first antenna part, it is section A at Figure
1, has length in lambda/4. So, the input