Page 2 of 7
Jan.-2002
FEATURES
1.
Multilayer LTCC ( Low Temperature Cofired Ceramics ) Technology
2.
Miniatured Size 2.00 x 1.25 x 0.95 mm
3
3.
Low Insertion Loss reduces power consumption
4.
Low inband Amplitude and Phase imbalance enable high performance wireless system operation.
5.
Enable for DC Biasing of PA or Mixer
6.
Suitable for 2.45 GHz Working Frequency Operation
7.
Special Balance/ Unbalance impedance is upon requested.
APPLICATIONS
1.
2.4GHz ISM Band RF Application
2.
Bluetooth, Wireless LAN, HomeRF
CONSTRUCTION
Fig 1. Outline of 2.4GHz Balun
DESCRIPTION
Our new ceramic Balun Transformer specified for 2.45 GHz ISM Band application,
as shown in fig-1. Both of Wireless LAN IEEE 802.11b, and Bluetooth
TM typically located on this unlicensed frequency
band which range covers from 2.4GHz to 2.5GHz (2.4835GHz). To fulfil the in-band and out-band frequency requirements,
this ceramic Balun has been designed to a low Amplitude imbalance and Phase imbalance, wide bandwidth (-10dB) as
well as l ow insertion loss characteristics through our advanced LTCC (Low Temperature Co-fired Ceramic)
technology and superior product design via 3D EM Simulation Skill.
This ceramic Balun has a rectangular ceramic body with a tiny dimension of 2.00 x 1.25 x 0.95 mm
3 future meet the SMT
automation and miniaturization requirements on modern portable devices.
DIMENSIONS
Figure
Symbol
Dimension
Terminals
Connection
L
2.00 ± 0.15 mm
1
Unbalanced port
W
1.25 ± 0.15 mm
2
Ground or DC feed
T
0.95 ± 0.10 mm
3
Balanced port
A
0.20 ± 0.20 mm
4
Balanced port
B
0.30 ± 0.20 mm
5
Ground
C
0.35 ± 0.20 mm
6
Non Connection
D
0.65 ± 0.20 mm
MARKING: No marking, the white block means up-side and unbalanced input
a
b
c
d
L
W
t
1
2
3
4
5
6
GND or DC feed
Unbalanced port
Balanced port
GND
N.C
Identified Mark