7HW Datasheet, PDF (1/2 Pages) TOKO, Inc – Radial Type Helical Filters

Radial Type Helical Filters
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7HW Double Tuned
7HT Triple Tuned
Frequency Range: 350MHz~1.2GHz
RoHS compliant
7HW
7HT
8Max. 1Max. _*14.7Max. 3.7 ^П0.5 _4.5
3.2
TYPE
7HW
7HT
8Max. 1Max. _*14.7Max. 3.7 ^П0.5
4.5
3.2
(Unit: mm)
4.5
*^{Either 11 or 12.9mm height is possible. ߴ͞NNɺNN΋ՄೳͰ͢}
(Unit: mm)
Features
• Compact low-profile helicalfolters, ideal for mobile
communications equipment.
• RoHS compliant
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• Ҡಈମ௨৴ʹ࠷దͳখܕബܗͷϔϧΧϧϑΟϧλ
• 3P)4
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Examples of 900MHz frequency response
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Typical characteristic for MCA radio use
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252HXPK-2709F
Test circuit
R1
45
18
R2
Test circuit
R1=R2=50Њ

302HXPK-1278B
2
7
R1 _{1 11 10 8}
R2
R1=R2=50Њ

0
ANTENNA CIRCUIT FILTER 302MXPR-1077E
BANDWIDTH
SELECTIVITY
0
BOTTOM VIEW
BANDWIDTH
0
BANDWIDTH
0
2
4
fo:904MHz
IL:1dB
6
8 _ʵ20
ʵ10
0
10
20
Frequency(MHz)
SELECTIVITY
0
2
4
6
8
fo:904MHz
IL:2.5dB
10 _{ʵ20 ʵ10}
0
10
20
Frequency(MHz)
SELECTIVITY
0
10
20
(dB) Return Loss
0
30
10
20
ʵ100 ʵ50
0
50
100
Frequency(MHz)
20
40
60
80
100
ʵ200 ʵ100
0
100 200
Frequency(MHz)
4
8
12
ʵ20
fo : 855MHz
IL : 1.5dB
ʵ10
0
10
20
Frequency(MHz)
20
40
60
ʵ200 ʵ100
0
100 200
Frequency(MHz)
RF CIRCUIT FILTER 252HXPK-2674F
BANDWIDTH
0
SELECTIVITY
0
2
20
4
6
ʵ20
fo : 859.5MHz
IL : 2.5dB
ʵ10
0
10
20
Frequency(MHz)
40
60
ʵ120 ʵ60
0
60
120
Frequency(MHz)
LOCAL FILTER 252HXPK-273F
BANDWIDTH
0
SELECTIVITY
0
2
20
4
fo : 910MHz
IL : 1.2dB
6
ʵ20 ʵ10
0
10
20
Frequency(MHz)
40
60
ʵ400 ʵ200
0
200 400
Frequency(MHz)
continued on next page
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