80
4
Thin-Film Low Pass Filter
LP0402N Series Harmonic Lead-Free LGA Termination Test Jig
-50
-40
-30
-20
-10
0
024681012
Frequency (GHz)
dB
LP0402N3500ANTR
F0
2F0
3F0
-50
-40
-30
-20
-10
0
024681012
Frequency (GHz)
dB
LP0402N5200ANTR
F0
2F0
GENERAL DESCRIPTION
These jigs are designed for testing the LP0603 LGA Low
Pass Filters using a Vector Network Analyzer.
They consist of a dielectric substrate, having 50Ω microstrips
as conducting lines and a bottom ground plane located at a
distance of 0.127mm from the microstrips.
The substrate used is Neltec’s NH9338ST0127C1BC (or
similar).
The connectors are SMA type (female), ‘Johnson
Components Inc.’ Product P/N: 142-0701-841 (or similar).
Both a measurement jig and a calibration jig are provided.
The calibration jig is designed for a full 2-port calibration, and
consists of an open line, short line and through line. LOAD
calibration can be done by a 50Ω SMA termination.
MEASUREMENT PROCEDURE
Follow the VNA’s instruction manual and use the calibration
jig to perform a full 2-Port calibration in the required band-
widths.
Solder the filter to the measurement jig as follows:
Input ➨Connector 1 (Jig) GND (Filter) ➨GND (Jig)
(Filter)
Output ➨Connector 2 (Jig) GND (Filter) ➨GND (Jig)
(Filter)
Set the VNA to the relevant frequency band. Connect the
VNA using a 10dB attenuator on the jig terminal connected
to port 2 (using an RF cable).
TEST JIG FOR LP0402 LOW PASS FILTER
Load &
Through
Short line to
GND
Connector
Johnson
P/N 142-0701-841
Open
line
Load &
Through
Measurement Calibration Jig