The Keysight (Agilent HP) 85027A is a high-performance directional bridge designed for reflection measurements from 10 MHz to 18 GHz. Designed to operate seamlessly with scalar network analyzers like the Agilent 8757, 8756, and 8755, it features high directivity, outstanding test port match, and the capability to detect both AC and DC signals depending on the analyzer used.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Integrated 1.5 m cable with multi-pin analyzer connector; RF Input: Type-N (f) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | Powered directly from compatible scalar network analyzer |
| Operating Temperature | 0 to 55 °C |
| Dimensions (W×H×D) | 143 mm × 26 mm × 103 mm |
| Weight | 0.5 kg |
| Shipping Weight | 1.4 kg |
Frequency and Impedance Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 10 MHz - 18 GHz |
| Nominal Impedance | 50 Ω |
RF Performance Parameters
| Parameter | Value |
|---|---|
| Directivity (0.01 to 8 GHz) | ≥40 dB |
| Directivity (8 to 12.4 GHz) | ≥37 dB |
| Directivity (12.4 to 18 GHz) | ≥35 dB |
| Test Port Match (0.01 to 8 GHz) | ≥30 dB Return Loss (1.065 SWR) |
| Test Port Match (8 to 12.4 GHz) | ≥24 dB Return Loss (1.135 SWR) |
| Test Port Match (12.4 to 18 GHz) | ≥22 dB Return Loss (1.173 SWR) |
| Typical Insertion Loss at 18 GHz | 8.0 dB |
Power and Electrical Ratings
| Parameter | Value |
|---|---|
| Maximum Continuous RF Input Power | +23 dBm (200 mW) |
| Maximum DC Voltage (RF Port) | ±10 V |
Connector and Port Configurations
| Parameter | Value |
|---|---|
| RF Input Connector Type | Type-N |
| RF Input Connector Gender | Female |
| Test Port Connector Type | APC-7 |
Calibration and Compatibility
| Parameter | Value |
|---|---|
| Compatible Scalar Network Analyzers | Agilent/HP 8757 (AC and DC modes), 8756 (AC mode), 8755 (AC mode) |
| Detection Modes | AC and DC (depending on scalar network analyzer used) |
Environmental
| Parameter | Value |
|---|---|
| Storage Temperature | -40 to +75 °C |
Performance
| Parameter | Value |
|---|---|
| Insertion Loss (0.01 to 8 GHz) | 6.5 dB (nominal) |
| Insertion Loss (8 to 12.4 GHz) | 7.0 dB (nominal) |
RF Performance
| Parameter | Value |
|---|---|
| Input Port Match (0.01 to 8 GHz) | 20 dB (SWR 1.22) |
| Input Port Match (8 to 12.4 GHz) | 17 dB (SWR 1.33) |
| Input Port Match (12.4 to 18 GHz) | 15 dB (SWR 1.43) |
Physical Characteristics
| Parameter | Value |
|---|---|
| Cable Length | 1.5 m (5 ft) |
Interfaces
| Parameter | Value |
|---|---|
| Analyzer Connector Type | 10-pin male |
Connectors
| Parameter | Value |
|---|---|
| Test Port Connector Gender | Sexless (APC-7) |
Technology
Directional Bridge
Applications
Scalar reflection measurements