1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
<!DOCTYPE HTML SYSTEM "html.dtd">
<HTML><HEAD><TITLE>Example 5 </TITLE></HEAD>
<BODY>
<H2><center>Example 5</center></h2>
<p><a href="ex5.txt">Example 5 </a> is a practical log-periodic antenna with 12
elements. Input data for the transmission line sections is printed in the table
"Network Data." The table "Structure Excitation Data at Network connection
Points" contains the voltage, current impedance, admittance, and power in each
segment to which transmission lines or network connect. This segment current
will differ from the current into the connection transmission line if there are
other transmission lines, network ports, or a boltage source providing alternate
current paths. Thus, the current printed here for segment 3 differs from that
in the table antenna" Input Parameters." The latter is the current through the
voltage source and includes the current into the segment and into the
transmission line. Power listed in the network-connection table is the power
being fed into the segment. A negative power indicates that the structure is
feeding power into the network or transmission line.
<p>With 78 segments, file storage must be used for the interaction matrix. The
line agter data carde number 14 shows how the matrix has been divided into
blocks for transfer between core and the files. The line "CP TIME TAKEN FOR
FACTORIZATION," gives the amout of central processor time used to factor the
matix excluding time spent transferring data between core and the files.
<p>The EX card option has been used to print the relative asymmetry of the
driving-point admittance matrix. The driving-point admittance matrix is the
matrix of self and mutual admittances of segments connected to transmission
lines, network ports, or boltage sources and should be symmetric.
<hr>
</body>
</html>
|
