4
0
˚
0
˚
0
˚
0
˚
MASter of PR
Oduction
2K55-988
N
･
71-
4988
-11L
Multimedia Technology
Specifications and external design are subject
to change for further improvement.
ASADA, NISSIN, AICHI 470-0194, JAPAN
JAN., 2007
= MASPRO DENKOH CORP. =
PERORMANCE
VSWR
Matching Loss (gain loss)
No loss with complete matching
0.2 dB (loss)
0.5 dB (loss)
1.2 dB (loss)
All graphs are produced using MASPRO's original, fully-automatic antenna measuring device.
MASPRO's performance data is obtained with painstaking honesty and is completely reliable.
MASPRO guarantees the accuracy of its performance data.
VSWR is the degree of matching
impedance.
An antenna with a VSWR of 3 or
lower (the closer to 1 the better) is
excellent.
E ch.47
LS14
Beamwidth
32˚
E ch.47
LS20
Beamwidth
26˚
E ch.39
LSL30
Beamwidth
19˚
E
ch.47
LS30
Beamwidth
20˚
Waterproof cap
×
1
ACCESSORY
DIRECTIVITY
Directivity is indicated by front-to-back ratio
and beamwidth.
Beamwidth
The narrower the beamwidth,
¡
The less likely it is that the
antenna will genarate interference
trough reflected signals from the
front, and
¡
The higher the actual gain
produced.
Front-to-back ratio
Front-to-back ratio is the ratio of the
forward and backward sensitivity in dB.
The larger the front-to-back ratio, the
less likely it is that the antenna will
genarate interference through reflected
signals from the back.
20dB
3dB
20dB
3dB
20dB
3dB
20dB
3dB
VSWR
1
1.5
2
3
Japanese Patent No.2548557
Japanese Patent No.2620091
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
Beamwidth
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63
57
44
56
43
55
42
54
41
53
40
52
39
51
38
50
37
49
36
48
35
47
34
46
33
45
32
44
31
43
30
42
29
41
28
40
27
39
26
38
25
37
36
35
34
33
32
24
31
23
30
22
29
21
28
20
27
19
26
18
25
17
24
16
23
15
22
14
21
13
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
44
31
43
30
42
29
41
28
40
27
39
26
38
25
37
36
35
34
33
32
24
31
23
30
22
29
21
28
20
27
19
26
18
25
17
24
16
23
15
22
14
21
13
EUROPEAN ch.
AMERICAN ch.
CHINESE ch.
EUROPEAN ch.
AMERICAN ch.
CHINESE ch.
770
MHz
470
470
Front-to-back ratio
Front-to-back ratio
Beamwidth
Beamwidth
VSWR
Z
0
=75
Ω
dB
˚(degree)
dB
dB
dB
18
16
14
12
10
8
6
4
3
2
1
4
3
2
1
35
30
25
20
15
60
50
40
30
20
10
Gain
Gain
662
MHz
18
16
14
12
10
8
6
35
30
25
20
15
50
40
30
20
10
LS14
LS14
LS20
LS20
LS30
LS30
LS30
LS20
VSWR
Z
0
=75
Ω
LS30
LS14
LS14
LS20
LS14, LS20, LS30
LSL30
˚(degree)
10dB
10dB
10dB
10dB
10dB
10dB
10dB
10dB
10dB
10dB
10dB
10dB
