The Keysight (Agilent HP) 11691D is a high-performance single directional coaxial coupler designed for broadband RF and microwave applications in the 2 to 18 GHz frequency range. With a nominal coupling of 20 dB and high directivity (up to 30 dB), it is ideal for precision broadband reflectometry and source leveling. It features low SWR on the primary line and APC-7 RF connectors.
Specifications
Physical
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | 152 mm × 37 mm × 236 mm |
RF Performance
| Parameter | Value |
|---|---|
| Frequency Range | 2 to 18 GHz |
| Nominal Coupling | 20 dB |
| Maximum Coupling Variation | ±1 dB (incident to test port) |
| Minimum Directivity (2 to 8 GHz) | 30 dB |
| Maximum Primary Line SWR (2 to 12.4 GHz) | 1.3 |
| Maximum Primary Line SWR (12.4 to 18 GHz) | 1.4 |
Electrical & Power Ratings
| Parameter | Value |
|---|---|
| Nominal Impedance | 50 Ω |
Mechanical & Connectors
| Parameter | Value |
|---|---|
| Primary Line Input Connector Type | APC-7 |
| Primary Line Output Connector Type | APC-7 |
| Coupled Port (Auxiliary) Connector Type | Type-N female (N(f)) |
| Configuration | Single coaxial directional coupler |
Performance
| Parameter | Value |
|---|---|
| Maximum Input Power (Average) | 50 W |
| Maximum Input Power (Peak) | 250 W |
| Maximum Auxiliary Line SWR (2 to 12.4 GHz) | 1.4 |
| Maximum Auxiliary Line SWR (12.4 to 18 GHz) | 1.5 |
| Insertion Loss | < 0.8 dB (to 12.4 GHz), < 1.0 dB (12.4 to 18 GHz) (excluding coupling loss) |
Option 001 Specifications
| Parameter | Value |
|---|---|
| Option 001 Primary Line Connectors | Type-N female |
| Option 001 Minimum Directivity (2 to 12.4 GHz) | 22 dB |
| Option 001 Minimum Directivity (12.4 to 18 GHz) | 20 dB |
| Option 001 Maximum Primary Line SWR (2 to 12.4 GHz) | 1.4 |
| Option 001 Maximum Primary Line SWR (12.4 to 18 GHz) | 1.5 |
| Option 001 Maximum Auxiliary Line SWR (2 to 12.4 GHz) | 1.4 |
| Option 001 Maximum Auxiliary Line SWR (12.4 to 18 GHz) | 1.5 |
Performance (Standard)
| Parameter | Value |
|---|---|
| Minimum Directivity (8 to 12.4 GHz) | 26 dB |
| Minimum Directivity (12.4 to 18 GHz) | 24 dB |
General
| Parameter | Value |
|---|---|
| Coupling Calibration | Calibration table at 1 GHz increments printed on nameplate |
Technology
Coaxial Directional Coupler
Applications
Broadband reflectometry, leveling broadband sources