The Keysight Technologies (formerly Agilent) Q347B is a millimeter-wave noise source covering the Q-band frequency range of 33 to 50 GHz. This high-precision waveguide noise source is designed for accurate, convenient noise figure measurements on millimeter-wave devices, offering exceptional excess noise ratio (ENR) stability over time to support extended calibration cycles.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | BNC (female) bias/drive connector |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 28 V ± 1 V pulsed DC (supplied by noise figure analyzer) |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 51 × 51 × 140 mm |
| Weight | 0.18 |
| Shipping Weight | 0.5 kg |
RF & Microwave Performance
| Parameter | Value |
|---|---|
| Frequency Range | 33 to 50 GHz |
| Waveguide Band | Q-band |
| Nominal Excess Noise Ratio (ENR) | 12 to 16 dB |
| Maximum SWR (Source On) | < 1.35 |
| Maximum SWR (Source Off) | < 1.35 |
Ports & Connectors
| Parameter | Value |
|---|---|
| RF Output Waveguide Size | WR-22 |
| RF Output Flange Type | UG-383/U |
| Bias Input Connector | BNC female |
Bias, Power & Control Interface
| Parameter | Value |
|---|---|
| Required Bias Voltage (DC) | 28 V ± 1 V |
Environmental & Reliability
| Parameter | Value |
|---|---|
| Storage Temperature Range | -55 to +75 °C |
Calibration, Traceability & Options
| Parameter | Value |
|---|---|
| ENR Calibration Frequency Points | Individually calibrated at 1 GHz steps across the operating band |
Calibration
| Parameter | Value |
|---|---|
| Calibration Traceability | NIST |
RF Specifications
| Parameter | Value |
|---|---|
| Maximum Reflection Coefficient | 0.15 |
Technology
Solid-state diode noise generation
Applications
Noise figure and gain measurements on millimeter-wave devices