The Keysight (Agilent) R8486D waveguide diode power sensor is designed for high-accuracy average power measurements in the Ka-band (26.5 GHz to 40.0 GHz). It features a dynamic range of -70 dBm to -20 dBm, exceptional SWR of 1.40 to minimize mismatch uncertainty, and a built-in 50 MHz calibration port that simplifies setup by eliminating the need for an external 30 dB attenuator.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | UG-599/U waveguide flange, Type-N (male) 50 MHz calibration port, 12-pin sensor cable connector |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered by compatible power meter via sensor cable |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 48 mm × 38 mm × 113 mm |
| Weight | 0.5 kg |
Frequency & Power Characteristics
| Parameter | Value |
|---|---|
| Frequency Range | 26.5 GHz to 40.0 GHz |
| Power Measurement Range | -70 to -20 dBm (100 pW to 10 µW) |
| Maximum Continuous Average Power | 100 mW (+20 dBm) |
| Maximum Peak Power | 100 mW (+20 dBm) |
| Maximum SWR | 1.40 |
| Power Linearity | negligible |
| Frequency Band | Ka-band |
Measurement Accuracy & Calibration
| Parameter | Value |
|---|---|
| Zero Set (EPM / P-Series) | ±20 pW |
| Zero Set (437B / 438A) | ±20 pW |
| Zero Set (435B / 436A) | ±200 pW |
| Zero Drift (1 hour, EPM / P-Series) | ±4 pW |
| Zero Drift (1 hour, 437B / 438A) | ±4 pW |
| Measurement Noise (EPM / P-Series) | < 110 pW |
| Measurement Noise (437B / 438A) | < 110 pW |
| Calibration Port Frequency | 50 MHz |
| Calibration Port Nominal Coupling | 30 dB |
| Traceability | NIST traceable |
RF Interface & Waveguide Specifications
| Parameter | Value |
|---|---|
| Waveguide Size | WR-28 |
| EIA Waveguide Designation | WR-28 |
| IEC Waveguide Designation | R320 |
| Waveguide Flange Type | UG-599/U |
| Flange Compatibility | MIL-F-3922/54-003 |
| Sensor Element Type | Diode |
| Calibration Port Connector | Type-N (male) |
System Compatibility
| Parameter | Value |
|---|---|
| Compatible Power Meters | Keysight EPM, EPM-P, P-Series, VXI E1416A, 70100A, 435B, 436A, 437B, 438A |
| Sensor Connector | 12-pin multi-conductor male |
Environmental & Safety Standards
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to 75 °C |
| Relative Humidity | 95% RH at 40 °C (non-condensing) |
| Operating Altitude | Up to 4,572 m (15,000 ft) |
| Storage Altitude | Up to 15,240 m (50,000 ft) |
| Vibration Standards | Tested to MIL-STD-28800D Class 3 |
Technology
Diode Power Sensing
Applications
RF and Microwave Power Measurement