DB0805A0915ASTR AVX Corporation, DB0805A0915ASTR Datasheet - Page 13

• Manufacturer Part Number: DB0805A0915ASTR
• Description: COUPLER, 3DB, 915MHZ
• Manufacturer: AVX Corporation
• Type: Thin-Film Directional Couplersr

Specifications of DB0805A0915ASTR

• Insertion Loss: 0.35dB
• Svhc: No SVHC (15-Dec-2010)
• Termination Type: SMD
• Frequency Response Max: 915MHz
• Product: Directional Couplers
• Frequency: 915 MHz
• Termination Style: SMD/SMT
• Package / Case: 0805 (2012 metric)
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3
Thin-Film Directional Couplers
DB0805 3dB 90° Test Jigs
GENERAL DESCRIPTION
These jigs are designed for testing the DB0805 3dB 90°
Couplers 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 0.254mm from the microstrips.
The substrate used is Neltec’s NH9338ST0254C1BC.
MEASUREMENT PROCEDURE
When measuring a component, it can be either soldered or
pressed using a non-metallic stick until all four ports touch
the appropriate pads. Set the VNA to the relevant frequency
band. Connect the VNA using a 10dB attenuator on the jig
76
Connector 4
Place the coupler on the
Input (Coupler)
50Ω (Coupler)
To measure
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ Port 2 (VNA)
Connector 2 (Jig) ➜ 50Ω
To measure
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ 50Ω
Connector 2 (Jig) ➜ 50Ω
To measure
Connector 1 (Jig) ➜ 50Ω
Connector 2 (Jig) ➜ 50Ω
Measurement Jig
R. Loss
R. Loss
Isolation
➜ Connector 1 (Jig)
➜ Connector 2 (Jig)
Connector 1
Connector 3
and
and
connect:
I. Loss 1
I. Loss 2
measurement jig
Connector 2
Connector 4 (Jig) ➜ 50Ω
Connector 4 (Jig) ➜ Port 2 (VNA)
Connector 3 (Jig) ➜ Port 1 (VNA)
Connector 4 (Jig) ➜ Port 2 (VNA)
connect:
connect:
Load &
Through
Output 1 (Coupler)➜ Connector 3 (Jig)
Output 2 (Coupler)➜ Connector 4 (Jig)
The connectors are SMA type (female), ‘Johnson Components
Inc.’ Product P/N: 142-0701-841.
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.
terminal connected to port 2. Follow the VNA’s instruction
manual and use the
calibration in the required bandwidths.
as follows:
Load &
Through
Calibration Jig
Open
Line
calibration jig
Connector
Johnson
P/N 142-0701-841
Short Line
to GND
to perform a full 2-port