4:

L. B. Cebik, W4RNL

( ) , SCV (, - ). bobtail curtain, , , [ 1 ]. Figure 1, (), , , . (), .

Figure 1. .

. .

, , SCV. , . , , . , , , , [ 2 ].

Figure 2. .

, SCV . , Figure 2. , . , , . Table 1 . , , . , . , , , .. , , , , .

:
,dBi
(R +/- jX Ohms)
:
60.8 .-;30.4 .- 3.31 51 + j 6
:
0.2 3.31 51 + j 6
30.41 ;
0.4 3.32 51 + j 7
30.7 ;
2.0 򠠠 3.36 51 - j 1
31.1 ;
4.0 򠠠 3.41 53 + j 5
: : 7,15 ; : #12 AWG; .
Table 1. .

, SCV. 10 15 . Figure 3. .

Figure 3. , , .

SCV, , ( ). , , , , , ( UA9LAQ) . 1,6:1 [ 3 ].

, , , , . , , . H (), V ( ), f - :

80 40

80- , 3,6 124,5 77 , : #12 AWG. 4,6 dBi. , , .

80- , :
, 렠 .
, dBi , 䠠 R +/- jX
5 1.74 23 80 + j13
(C=0.001, 10 1.92 22 74 + j 5
DC=5) 15 2.05 22 70 + j 1
20 2.14 21 67 - j 3
25 2.21 20 65 - j 1
30 2.27 20 63 - j 1
5 3.24 21 80 + j17
(C=0.002, 10 3.34 20 75 + j 7
DC=13) 15 3.40 20 71 + j 2
20 3.42* 19 68 - j 0
25 3.42* 18 66 - j 1
30 3.41 18 64 - j 2
5 3.75 20 81 + j19
(C=0.005, 10 3.79* 19 75 + j 8
DC=13) 15 3.79* 18 71 + j 2
20 3.76 18 68 - j 0
25 3.71 17 66 - j 1
30 3.63 16 64 - j 2
頠 5 6.30 15 80 + j20
(C=0.0303, 10 6.36 15 75 + j 9
DC=20) 15 6.40 14 72 + j 3
20 6.42* 14 69 - j 0
25 6.42* 13 66 - j 2
30 6.40 13 64 - j 3
: 1. * = .
2. = 124,5 ; 77 .
: #12 AWG (2,1 )
Table 2. 80- .

Table 2 80- . , , , , , , . , , , , , . , SCV, , , , . 70 , , 10 .

7,15 : - 62.45 , 39 , #12 AWG (2,1 ). #12 ( UA9LAQ), 4.7 dBi. , 80 , , , .

40- , ( ):
ࠠ ࠠ 堠 렠 .
, dBi , . R +/- jX
5 2.41 23 73 + j 4
(C=0.001, 10 2.72 22 67 - j 1
DC=5) 15 2.94 21 64 - j 2
20 3.13 20 62 - j 2
25 3.29 19 61 - j 1
5 3.57 21 75 + j 6
(C=0.002, 10 3.72 20 68 - j 1
DC=13) 15 3.78 18 64 - j 3
20 3.80* 17 62 - j 2
25 3.78 16 61 - j 1
5 3.40 20 76 + j 6
(C=0.005, 10 3.46* 19 68 - j 1
DC=13) 15 3.42 17 64 - j 3
20 3.33 16 62 - j 3
25 3.20 15 61 - j 1
頠 5 5.50 17 76 + j 7
(C=0.0303, 10 5.51* 15 69 - j 2
DC=20) 15 5.44 14 65 - j 4
20 5.26 13 62 - j 4
25 5.05 12 60 - j 2
:1. * = .
2. = 62,45 ;39 .
: #12 AWG.
Table 3. 40- , .

Table 3 40- . , , , . 80- , , 40- , , , . , . , #12 40 , 80, , , 80- .

(), , , . , , , 80-, 40- , . Table 4 40- 60 ( ). :

40- , :
ࠠ ,
, . dBi , . R +/- jX
5 2.41 23 73 + j 4
(C=0.001, 10 2.72 22 67 - j 1
DC=5) 15 2.94 21 64 - j 2
(-) 20 3.13 20 62 - j 2
25 3.29 19 61 - j 1
(DC- 30 3.45 18 61 + j 0
) 35 3.60 18 62 + j 1
40 3.76 18 62 + j 1
45 3.92 17 63 + j 1
50 4.10 16 64 + j 1
55 4.29 16 64 + j 1
60 4.48 15 64 + j 0
Table 4. ʠ 40- , .

, Figure 4 . 10, 25 40 , . , , , . , , , QRM QRN, . , , .

Figure 4. . , , .

, , , SCV. , , , . SCV.

80- 40- 50

Table 3 Table 4 , 50 . , 50- 50 .

80- (3,6 ) 155 60 , , 50- . / 2,58:1, 1,6:1. , Table 5. , , . , , . 50- .

80- 50 :
ࠠ , 렠
, dBi , . R +/- jX
頠 5 -0.29 25 66 + j 9
(C=0.001, 10 -0.12 24 61 - j 1
DC=5) 15 -0.02 24 57 - j 7
20 0.03 23 54 - j10
25 0.06 22 52 - j13
30 0.08 21 51 - j15
5 1.61 23 61 + j16
(C=0.002, 10 1.66* 22 57 + j 4
DC=13) 15 1.66* 22 54 - j 3
20 1.61 21 53 - j 7
25 1.54 20 51 - j10
30 1.46 19 50 - j12
5 2.33* 21 60 + j21
(C=0.005, 10 2.30 21 56 + j 8
DC=13) 15 2.20 20 54 + j 1
20 2.08 19 53 - j 4
25 1.93 18 52 - j 8
30 1.77 18 51 - j11
頠 5 5.27* 16 52 + j25
(C=0.0303, 10 5.17 16 51 + j12
DC=20) 15 5.04 16 50 + j 4
20 4.89 15 50 - j 1
25 4.73 14 50 - j 5
30 4.58 14 50 - j 8
:1. * = .
2. = 155 -;60 .
: #12 AWG.
Table 5. 80- = 50 , .

Figure 5 80 3,6 . , , 77 . , , 2 : 1, , . , , 500 , , .

80- 15 .

.

Figure 5. 80- ( ) 50 .

40 , 50- . 7,15 : 70,5' , 34,5 vertically ( #12 AWG). / 2 : 1, , 80- . Table 6, 40- , 80- , ( UA9LAQ), , , , . , . , 40- 50- , , , 80 .

40- , 50- , .
, 렠
, dBi , . R +/- jX
頠 5 1.85 24 58 + j 4
(C=0.001, 10 2.15 23 53 - j 3
DC=5) 15 2.34 21 50 - j 6
20 2.51 20 48 - j 6
25 2.68 19 47 - j 7
5 3.19 22 58 + j 8
(C=0.002, 10 3.30 20 53 - j 1
DC=13) 15 3.31* 19 50 - j 5
20 3.28 18 48 - j 6
25 3.23 17 48 - j 6
5 3.06* 21 59 + j 9
(C=0.005, 10 3.06* 19 53 - j 0
DC=13) 15 2.97 18 50 - j 4
20 2.83 17 49 - j 6
25 2.68 16 48 - j 6
頠 5 5.34* 17 57 + j12
(C=0.0303 , 10 5.24 16 52 + j 1
DC=20) 15 5.06 15 50 - j 3
20 4.82 14 49 - j 5
25 4.54 13 48 - j 6
:1. * = .
2. = 70,5 ; 34,5 .
: #12 AWG.
Table 6. 40- , 50- , .

40- . , Figure 6, , , 6 - , 140 . , , 40 , , , , .

40- 10 .

.

Figure 6. 40- 50- .

, , . , , - , . . .

Figure 7. , . , .

, , , Figure 7. , , , - 90 270 , . , 5 , , . , , .

, [ 4 ]. , . , (, ) .

80- :
, . , .
dBi . (R +/- jX )
. ,
.
3.6
a. 3.79 18 90 71 + j 3
b. ࠠ 3.93 18 85 4100 - j4000
7.15
a. 5.35 20 55 1400 - j 30
b. 5.17 20 53 1900 - j3000
10.1
a. 6.59 16 41 1000 - j 600
b. 6.46 19 40 350 - j2000
14.1
a. 6.78 33 31 600 - j 200
b. ࠠ 7.29 34 30 800 - j1000
:1. = 124.5 ; 77 .
: #12 AWG.
= 15 .
Table 7. 80- .

Table 7 80- 40, 30 20 . , , , . , , . .

Figure 8. 80- 40- . , .

40 , Figure 8. . , 80 40 9 dBi, 40 . , .

Figure 9. 80- , , 30 . , ( ) .

80- 30 20 , Figure 9 Figure 10. . 20- - , , , . .

Figure 10. 80- , , 20 . , .

, , DX. , , , ( ) . , , .

, , , , / DX-, . , SCV, , , , . , 80- 90100 , 40- 5060 . , , , , c .

, - , , , . , , , 90 , . , .

, . SCV, . SCV , ? , , , . , SCV , , , . , , , , , - , , , QRM QRN, . , , () , .

SCV , , , . 20 - , SCV. SCV , 60 , Yagi, .

, , . , SCV , , .

, , SCV, . SCV (). , , , double magnetic slot, bobtail curtain). SCV . .

:

1 - bobtail curtain. : Ben Vester, K3BC, "The Half Square Antenna," QST (March, 1974), 11-14. : Radio Communications for January, 1977 (p. 36). : Robert Schiers, N0AN, "The Half-Square Antenna," Ham Radio (December, 1981), 48-50. . bobtail curtain, : Woodrow Smith, W6BCX, "Bet My Money on the Bobtail Beam," CQ (March, 1948), 21-23 and 92-95. Smith: "The Bobtail Curtain and Inverted Ground Plane," Parts 1 and 2 in Ham Radio (February, 1983), 82-86, and (March, 1983), 28-30. See also John Devoldere, ON4UN, Antennas and Techniques for Low-Band DXing, 2nd Ed. (Newington: ARRL, 1994), Chapter 12, "Other Arrays."

2 Communications Quarterly. , , , . , : Hannes Coetzee, ZS6BZP, "A Visit to the Half Square Antenna," Communications Quarterly (Spring, 1998), 83-90. ( ½ ), . , SCV , , DX , . SCV ( : ) , .

3 , 0,62:1. , Fibonacci:

( 0,618034, , , 1,618034. , . ., . Fibonacci , ( ) ; , , .

4 , , Joe Everhart, N2CX, "End-Fed Half-Wave Antennas," QRPp (Spring, 1998), 11-15.

: (UA9LAQ) ua9laq@mail.ru
. , 2004