1
2
ψDΞͬSƷyԇD
늾Ҏ(gu)飺1/0.5BC+LDPE 2.9+AMp 40U+B16/8/0.10BC+AM 25U+PVC5.0
Ҫ5MHz-2.2GHz -100dB
Ո: 1.lʲôh(yun)h(yun)ڸl
2.D(yn)Ǟʲô
3.Ҫԓô
ՈͬSւṇٸм
3
yԇ(yng)І},l50MHz̫̎60dB_ʼ,ǾķdzL,L(sh)п
D(yn)ؑ(yng)͜yԇP(gun),
˵Ҫ߀ҪLȲź,100dB/km 100dB/meter...
t5MHz-2.2GHz _(d)(bio)
4
densen1:
yԇ(yng)І},l50MHz̫̎60dB_ʼ,ǾķdzL,L(sh)п
D(yn)ؑ(yng)͜yԇP(gun),
˵Ҫ߀ҪLȲź,100dB/km 100dB/meter...
t5MHz-2.2GHz _(d)(bio)
xx
ψyԇƷLȞ10M.
˷݈(qun)yԇC(j)(gu)yԇЇϢa(chn)I(y)Ϣݔ|(zh)O(jin)zġ
5
6
p 40U֪X߀ǿ
7
νY(ji)(gu)_(d)@yԇ(sh)ֵ(yng)ԓ̫lҪ70.
l˥pƫСκȵӰ
8
ҲS2L龀˥p
]Ӄ(ni)X55UճԵҪҲõ40UҪ100DBҪõΡ
9
xxλ
Ո˥p͌(do)wСЛ]P(gun)ϵ(do)wҎ(gu)ͬ75Ohmsи?
ՈyԇԭDzǏČ(do)wl(f)̖ͨ^ⲿŭh(hun)©Ӎ
10
˥pcǶܶνzֱνY(ji)(gu)P(gun)ϵþܶȴЩǶ45ңνzЩνY(ji)(gu) AL50Uճ)+B+AL(50U)+BČӽY(ji)(gu)
Ǹ(j)ǰyԇ(jng)Y(ji)ԇ£
11
xxλ
Ո˥p͌(do)wСЛ]P(gun)ϵ(do)wҎ(gu)ͬ75Ohmsи?
ՈyԇԭDzǏČ(do)wl(f)̖ͨ^ⲿŭh(hun)©Ӎ
12
ŭh(hun)(do) 迹noiseܸ
13
, yԇІ}
]Џ0_ʼ(yn)ξߛ]
14
W(xu)(x),xx!
15
˥pĜyԇDΛ]І}@
lcǏ50MHz_ʼô0_ʼ
16
늾Ҏ(gu)飺1/0.5BC+LDPE 2.9+AMp 40U+B16/8/0.10BC+AM 25U+PVC5.0
늾̖@ӵģƷ㌍Hо(do)wڶƳ^пܕ(x)
ȫY(ji)(gu)ķ~
17
ҺãՈһԜyԇͬS˥p
18
19
ՈԜy˥p
20
DǛ]І}XǟXճXدB20%
21
xxˣÖ|
22
@NˮƽľҲõó
23

24
W(xu)(x)
25
26
ֵ
27
