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Thin-Film Low Pass Filter

LP0805 Test Jig

GENERAL DESCRIPTION

These jigs are designed for testing the LPF0805 Low Pass

Filters using a Vector Network Analyzer.

They consist of a dielectric substrate, having 50W microstrips

as conducting lines and a bottom ground plane located at a

distance of 0.254 mm from the microstrips.

The substrate used is RF-35-0100-C1B107 (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 50W SMA termination.

MEASUREMENT PROCEDURE

widths.

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).

ITF TEST JIG FOR LOW PASS FILTER 0805

Connector 1

Connector 2

Load

Through

Load

Through

Short line to

GND

Connector

Johnson

P/N 142-0701-841

Open

line

Measurement

Calibration Jig