Thin-Film Directional Couplers
CP0402 / CP0603 High Directivity Couplers Test Jigs
GENERAL DESCRIPTION
Ω SMA termination. When measuring a component, it can be either soldered orpressed 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 jigterminal connected to port 2. Follow the VNA’s instructionmanual and use the These jigs are designed for testing the CP0402 and CP0603High Directivity Couplers using a Vector
Network analyzer. They consist of a dielectric substrate, having 50 Ω microstripsas conducting lines and a bottom ground plane located at a
distance of 0.254mm (0.010") from the microstrips.The substrate used is Neltec’s NH9338ST0254C1BC. The
connectors specification are SMA type (female), ‘Johnson ComponentsInc.’ 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, andconsists of an open line, short line and through line. LOAD
calibration can be done by a 50
MEASUREMENT PROCEDURE
calibration jig to perform a full 2-Port calibration in the required bandwidths.
Place the coupler on the measurement jig as follows:
Input (Coupler) ➜ Connector 1 (Jig) Termination (Coupler) ➜ Connector 3 (Jig)Output (Coupler)
3
➜ Connector 2 (Jig)Coupling (Coupler) ➜ Connector 4 (Jig)
To measure I. Loss connect:
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ 50 Ω Connector 2 (Jig) ➜ Port 2 (VNA) Connector 4 (Jig) ➜ 50 Ω
To measure R. Loss and Coupling connect:
Connector 1 (Jig) ➜ Port 1 (VNA) Connector 3 (Jig) ➜ 50 Ω Connector 2 (Jig) ➜ 50 Ω Connector 4 (Jig) ➜ Port 2 (VNA)
To measure Isolation connect:
Connector 1 (Jig) ➜ 50 Ω Connector 3 (Jig) ➜ 50 Ω Connector 2 (Jig) ➜ Port 1 (VNA) Connector 4 (Jig) ➜ Port 2 (VNA)
Measurement Jig Calibration Jig
Connector 1Connector 2Connector 4Connector 3 Short Lineto GND.Load &ThroughLoad &Through
ConnectorJohnson
P/N 142-0701-841OpenLine HS OPEN TH 45