Ideal transmission
1) ideal Transmission:
The two following conditions must be verified:
to) it marks directed them on the
utilizzatore is faithful to marks directed them in entrance to
trasmissivo means, that is the relation 
is
verified
b) they are null marks reflected them.
2) Function of transfer of a quadripolo ideal:
.
3) ideal symmetrical Amplifier:
Having draft of quadripolo mutual a gain 
.
4) ideal Suppressor:
Having draft of quadripolo mutual an attenuation 
.
5) ideal Insulator:
Draft of a unidirectional suppressor with g = 1.
6) Gain of insertion:
7) Delay of insertion:
8) Gain of transfer:
9) Delay of transfer:
10) perfect Quadripolo in band base:
Draft of a quadripolo that it satisfies the following conditions:
to) it is to delineate and invariant time
b) in useful band reflectances H 11 (f) and22H (f) arenull
c) in useful band is constant |H(f)| = |H21(f)|
d) in useful band it is proporziona them to frequenza the arg|H(f)| = arg|H21(f)|.
in short the gain of insertion and the delay of insertion must be constant in band.
11) Delay of group of insertion:
12) perfect Quadripolo in traslata band:
Draft of a quadripolo that it satisfies the following conditions:
to) it is to delineate and invariant time
b) in useful band reflectances H 11 (f) and22H (f) arenull
c) in useful band is constant |H21(f)|
d) in useful band arg|H21(f)| is linear function of the frequency
in short the gain of insertion and the delay of group of insertion must be constant in band.
13) Converter of frequency:
Draft of a quadripolo not linear (…in how much generates not present frequencies in marks them of income) and is such that its function of equivalent transfer in band base
he is independent is from the time that gives the excitation phantom.
14) Conditions for the ideal transmission in band traslata in the case of quadripolo a not linear invariant time:
to) function of equivalent transfer in band exists one base
b) reflectances H 11 (f) and22H (f) arenull
c) |HC(f)| he is constant
d) arg|HC(f)| is linear function of the frequency
15) Typology of trasmissivi means:
They are divided in two great categories:
to) carrying physicists it realizes to you is with dielectrics that with conductors concur are transmission in band base that traslata
b) carrying radios only concur the transmission in traslata band
16) perfect trasmissivo Means:
E' represented like quadripolo a passive, mutual and
adapted LTI in which the two doors they are separated from a distance
r, has 
for every |f| ? (fm , fM).
17) Attenuation of trasmissivi means:
In the case of the carrying physicists the attenuation is
expressed from a exponential 
while for the
carrying radios 
is had.
18) Selettività of a filter:
It is the relationship between the cut frequency that
separates to the passing band from the dark band and the width of the
correspondent transition interval, ossia 
.
19) QB :
One uses in the case of filters pass-band and
eliminate-band, is equal to the relationship between the frequency of
center band and the amplitude of the 3 band to dB , ossia 
.
20) equalizzatore Quadripolo:
It is a quadripolo such that place in having cascade to
quadripolo a function of H(f) transfer from place to perfect a total
system, its function of transfer is 
" f ? (fm , fM)
21) complementary Quadripolo:
It is such that place in cascade to a quadripolo, supplies to its escape marks them faithful to marks them present in income to the first one quadripolo.
22) System of perfect transmission:
It is an able system to allow the ideal transmission in a specific band, also when in it they are comprised of the quadripoli that, it considers you separately do not have a perfect behavior.
