TDK HHM1791A1 User Manual
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Multilayer Chip Baluns
For WiMAX
HHM Series HHM1791A1
SHAPES AND DIMENSIONS
1.6± 0.1
654
123
0.55± 0.1
0.1±0.1 0.25 ±0.1
CIRCUIT DIAGRAM
Unbalanced
input
50
Ω
0.6± 0.1
0.8± 0.1
0.3± 0.1
Dimensions in mm
564
123
Terminal functions
1 N.C.
2 GND
3 Balanced port
4 Balanced port
5 GND
6 Unbalanced port
Balanced
output
100Ω
Conformity to RoHS Directive
RECOMMENDED PC BOARD PATTERNS
0.25
0.25
This width is 50Ω.
Micro-strip line for 0.4mm thick
glass-epoxy substrate.
0.7
654
123
0.3
0.3
ø0.3 Through-hole
Dimensions in mm
0.6
0.6 0.3
ELECTRICAL CHARACTERISTICS
Unbalanced impedance 50Ω
Balanced impedance 100Ω
Frequency range 500 to 22 700MHz
Unbalanced port return loss 10dB min.
Phase imbalance at balanced port 180±10deg
Amplitude imbalance at balanced port 0±2.2dB
Insertion loss 0.8dB max.
Temperature range
Packaging style and quantities 4000pieces/reel
Operating –40 to +85°C
Storage –40 to +85°C
• Conformity to RoHS Directive: This means that, in conformity with EU Directive 2002/95/EC, lead, cadmium, mercury, hexavalent chromium, and
specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.
• All specifications are subject to change without notice.
002-01 / 20080520 / e751_hhm1791a1.fm
FREQUENCY CHARACTERISTICS
Unbalance 50Ω/Balance 100Ω
RETURN LOSS
0
–5
)
–10
dB
(
–15
–20
–25
–30
Return loss
–35
–40
2400 2800270026002500
1
Frequency(MHz
2
3
)
1: 2500.0MHz
–17.18dB
2: 2600.0MHz
–18.25dB
3: 2700.0MHz
–19.35dB
AMPLITUDE BALANCE
5
)
4
dB
3
(
2
1
0
–1
–2
–3
–4
Amplitude balance
–5
2400 28002700260025002450 275026502550
1
Frequency(MHz
2
(2/2)
1: 2500.0MHz
1.11dB
2: 2600.0MHz
0.24dB
3: 2700.0MHz
3
)
–0.64dB
INSERTION LOSS
0.0
–0.5
)
–1.0
dB
(
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
Insertion loss
–4.5
–5.0
2400 28002700260025002450 275026502550
1
2
Frequency(MHz
PHASE BALANCE
3
)
1: 2500.0MHz
–0.38dB
2: 2600.0MHz
–0.36dB
3: 2700.0MHz
–0.36dB
200
)
190
deg.
(
180
170
Phase balance
160
2400 28002700260025002450 275026502550
1
Frequency(MHz
1: 2500.0MHz
178.35deg.
2: 2600.0MHz
177.11deg.
3: 2700.0MHz
2
3
)
175.89deg.
• All specifications are subject to change without notice.
002-01 / 20080520 / e751_hhm1791a1.fm
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