The Keysight (formerly Agilent HP) 772D is a high-performance, 20 dB dual-directional coupler designed for broadband swept measurements over the 2 to 18 GHz frequency range. It is ideal for reflectometer applications, allowing simple forward and reverse power measurements on transmitters and microwave systems when combined with power sensors and meters.
Specifications
Physical
| Parameter | Value |
|---|---|
| Dimensions (W×H×D) | 368 mm × 86 mm × 46 mm |
| Weight | 1.4 |
Frequency & Coupling Performance
| Parameter | Value |
|---|---|
| Frequency Range (Minimum) | 2 GHz |
| Frequency Range (Maximum) | 18 GHz |
| Nominal Coupling | 20 dB |
| Coupling Variation (Flatness) | ±1.0 dB |
| Minimum Directivity (2 to 12.4 GHz) | 30 dB |
| Minimum Directivity (12.4 to 18 GHz) | 27 dB |
| Tracking Between Auxiliary Arms | < ±0.7 dB |
Insertion Loss & VSWR
| Parameter | Value |
|---|---|
| Mainline Insertion Loss (2 to 12.4 GHz) | < 0.9 dB (including coupled power) |
| Mainline Insertion Loss (12.4 to 18 GHz) | < 1.1 dB (including coupled power) |
| Primary Line VSWR (Input Port, 2 to 12.4 GHz) | 1.20 |
| Primary Line VSWR (Input Port, 12.4 to 18 GHz) | 1.25 |
| Primary Line VSWR (Output Port / Test Port, 2 to 12.4 GHz) | 1.25 |
| Primary Line VSWR (Output Port / Test Port, 12.4 to 18 GHz) | 1.35 |
| Secondary Line VSWR (Coupled Ports, 2 to 12.4 GHz) | 1.20 |
| Secondary Line VSWR (Coupled Ports, 12.4 to 18 GHz) | 1.35 |
Power & Impedance
| Parameter | Value |
|---|---|
| Nominal Impedance | 50 Ω |
| Maximum Input Power (CW) | 50 W |
| Maximum Peak Power | 500 W |
Port & Connector Configurations
| Parameter | Value |
|---|---|
| Primary Input Connector Type | Type-N |
| Primary Input Connector Gender | Female |
| Primary Output Connector Type (Test Port) | APC-7 |
| Coupled Port Connector Type (Incident) | Type-N |
| Coupled Port Connector Gender (Incident) | Female |
| Coupled Port Connector Type (Reflected) | Type-N |
| Coupled Port Connector Gender (Reflected) | Female |
Physical Dimensions & Mechanical
| Parameter | Value |
|---|---|
| Overall Length | 368 mm |
| Overall Width | 46 mm |
| Overall Height | 86 mm |
| Net Weight | 1.4 kg |
| Shipping Weight | 2.2 kg |
General
| Parameter | Value |
|---|---|
| Coupler Type | Dual-Directional |
| Internal Termination | Yes |
Options
| Parameter | Value |
|---|---|
| Option 001 Connectors | Type-N (f) on mainline input and output ports |
Technology
Coaxial Dual-Directional Coupler
Applications
Broadband swept measurements, reflectometer setups, and power monitoring