0898LP18A035E Johanson Technology Inc, 0898LP18A035E Datasheet - Page 43

• Manufacturer Part Number: 0898LP18A035E
• Description: FILTER LOWPASS GSM/CDMA 898MHZ
• Manufacturer: Johanson Technology Inc

Specifications of 0898LP18A035E

• Frequency: 897.5MHz Center
• Bandwidth: 35MHz
• Filter Type: Low Pass
• Insertion Loss: 0.6dB
• Package / Case: 1206 (3216 Metric)
• Mounting Type: Surface Mount
• Frequency Range: 880MHz To 915MHz
• Return Loss: 10.9dB
• Bandpass Insertion Loss Max: 0.6dB
• Attenuation @ Reject Band Min: 18dB
• Filter Case: 1206
• Termination Type: SMD
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS Compliant
• Ripple: -
• Other names: 0898LP18A035; 712-1120-2

T
LASERtrim
functional RF circuitry tuning. The tuning is normally
performed at a laser station integrated into the
automated assembly line at a point beyond any
operations that may significantly alter the circuit’s RF
characteristics. Tuning is performed by a computer
controlled YAG laser beam which removes or “trims”
the top electrode material of the LASERtrim
decreasing it’s capacitance. Circuit parameters such
as frequency or voltage are monitored during tuning
and fed back to the laser controller achieving extremely
precise results. Typical capacitance change in relation
to the amount of electrode removal is shown in the
graphs below.
UNING
100%
10%
20%
30%
40%
50%
60%
70%
80%
90%
0%
Gold Plating
0%
D
Sectional Diagram: Sizes L14 & L15
10%
®
ESCRIPTION
tuning capacitors are used to provide
20%
Trimming Effect on Capacitance
30%
Nickel
End Terminations
Surface Electrode
Electrode Area Removed
40%
L41 CAP
50%
Electrode
60%
70%
www.johansontechnology.com
www.johansontechnology.com
L18 CAP
80%
Ceramic
®
thereby
90%
100%
10
1
0
Gold Plating
Sectional Diagram: Sizes L18 & L41
LASER STATION
VISION SYSTEM
CONTROLLER
LASER BEAM
Typical Series Resonant Frequency
5
U.S. PATENT 5264983
Nickel
End Terminations
Surface Electrode
10
Frequency (MHz)
L15N100
L18C2R0
Electrode
15
(VCO, BAND PASS FILTER
MEASUREMENT
FREQUENCY COUNTER,
(SPECTRUM ANALYZER,
SIGNAL GENERATOR
POWER SUPPLY &
STIMULUS
CIRCUIT
L18L6R5
L41N210
20
Ceramic
25
43