了解了电磁感应及其在阻抗变换器中的应用原理,万变不离其宗。
choke balun取材容易制作简单,仍然遵循传输线阻抗变换的原理,可接成1:1和1:4常用的接法,主要突出了扼流圈作用,使电缆屏蔽层不形成对地的辐射场。
以上拙见仅供参考,欢迎拍砖!
single band (very effective)
mhz rg-213, rg-8 rg-58
3.5 22 ft, 8 turns 20 ft, 6-8 turns
7 22 ft, 10 turns 15 ft, 6 turns
10 12 ft, 10 turns 10 ft, 7 turns
14 10 ft, 4 turns 8 ft, 8 turns
21 8 ft, 6-8 turns 6 ft, 8 turns
28 6 ft, 6-8 turns 4 ft, 6-8 turns
multiple band
mhz freq rg-8, 58, 59, 8x, 213
3.5-30 10 ft, 7 turns
3.5-10 18 ft, 9-10 turns
14-30 8 ft, 6-7 turns