TDK HHM Series HHM1791A1 Leaflet
(1/2)
002-01 / 20080520 / e751_hhm1791a1.fm
• All specifications are subject to change without notice.
Multilayer Chip Baluns
For WiMAX
For WiMAX
HHM Series HHM1791A1
SHAPES AND DIMENSIONS
0.6
±0.1
0.8
±
0.1
0.3
±0.1
0.1
±0.1 0.25±0.1
1.6
±0.1
6
5
4
1
2
3
Dimensions in mm
0.55
±0.1
1
N.C.
2
GND
3
Balanced port
4
Balanced port
5
GND
6
Unbalanced port
Terminal functions
CIRCUIT DIAGRAM
1
2
3
5
6
4
Unbalanced
input
input
50
Ω
Balanced
output
output
100
Ω
RECOMMENDED PC BOARD PATTERNS
0.3
0.25
0.25
0.6
0.3
0.6
ø0.3 Through-hole
Dimensions in mm
0.7
0.3
6
5
4
1
2
3
This width is 50
Ω.
Micro-strip line for 0.4mm thick
glass-epoxy substrate.
glass-epoxy substrate.
ELECTRICAL CHARACTERISTICS
Unbalanced impedance
50
Ω
Balanced impedance
100
Ω
Frequency range
500 to 2
2
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
Operating
–40 to +85°C
Storage
–40 to +85°C
Packaging style and quantities
4000pieces/reel
Conformity to RoHS Directive
•
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.
specific bromine-based flame retardants, PBB and PBDE, have not been used, except for exempted applications.