Transcript 4 Element Cubical Quad Antenna

4 Element Cubical Quad Antenna
Dr. Carl O. Jelinek
N6VNG
[email protected]
1998/11/3
© Dr. Carl O. Jelinek N6VNG
4 Element Quad
Driven
Reflector
R1
L1
L2
S1
1998/11/3
Director 1
R2
Director 2
R3
L3
S2
© Dr. Carl O. Jelinek N6VNG
R4
L4
S3
Design Equations
1030{ ft} 313.94{m}

f {MHz }
f {MHz }
1005{ ft} 306.32{m}
L2 

f {MHz }
f {MHz }
975{ ft} 297.18{m}
L3 

f {MHz }
f {MHz }
975{ ft} 297.18{m}
L4 

f {MHz }
f {MHz }
S1  S 2  S 3  0.25 * { ft}  0.25 * {m}
L1 
c
300{m} 984.25{ ft}


f
f {MHz }
f {MHz }
Li
Ri 
 1.4142 * Li

sin( 45 )

1998/11/3
© Dr. Carl O. Jelinek N6VNG
Dimensions
Band
Design Freq.
{meters} {MHz}
20
14.18
17
18.12
15
21.24
12
24.97
10
28.5
6
51
Reflector Loop Length Driven Loop Length
Director Loop Length
(4*L1)
(4*L2)
(4*L3 or 4*L4)
FEET
METERS FEET
METERS FEET
METERS
72.64
22.14
70.87
21.6
68.76
20.96
56.84
17.33
55.46
16.91
53.81
16.4
48.49
14.78
47.32
14.42
45.9
13.99
41.25
12.57
40.25
12.27
39.05
11.9
36.14
11.02
35.26
10.75
34.21
10.43
20.2
6.16
19.71
6.01
19.12
5.83
Band
Design Freq. Reflector R1
Driven R2
Director R3 & R4
{meters} {MHz}
FEET
METERS FEET
METERS FEET
METERS
20
14.18
12.84
3.91
12.53
3.82
12.15
3.7
17
18.12
10.05
3.06
9.8
2.99
9.51
2.9
15
21.24
8.57
2.61
8.36
2.55
8.11
2.47
12
24.97
7.29
2.22
7.11
2.17
6.9
2.1
10
28.5
6.39
1.95
6.23
1.9
6.05
1.84
6
51
3.57
1.09
3.48
1.06
3.38
1.03
1998/11/3
© Dr. Carl O. Jelinek N6VNG
Dimensions
Band
Design Freq. Spacing Si
{meters} {MHz}
FEET
METERS
20
14.18
17.35
5.29
17
18.12
13.58
4.14
15
21.24
11.58
3.53
12
24.97
9.85
3
10
28.5
8.63
2.63
6
51
4.82
1.47
1998/11/3
© Dr. Carl O. Jelinek N6VNG