The coaxial sliding load and mismatch are movable, low reflection loads used to make precision microwave measurements. By moving the load, its reflection can be separated from the other reflections in the system. This technique allows you to measure the directivity of coaxial directional couplers and the residual standing wave ratio (SWR) of coaxial slotted lines. The sliding mismatch is mechanically similar to the sliding load except that its reflection is somewhat higher so that a known mismatch can be introduced into a system for calibration. The reflection is between 23 dB and 28 dB over the frequency range from 3 to 26.5 GHz.
The sliding load contains a hollow cylindrical iron-bearing plastic load element that surrounds the center conductor. The gradual tapering of the load element enables it to absorb the applied RF energy.
The load element can be moved within the instrument body at least one-half of a wavelength at the lowest rated frequency (3 GHz). Some applications may require that the load element be moved in precise steps. There are 6 marks scribed along the body of the load. Use these marks for optimum calibration of the vector network analyzer.
Keysight 911E Features
- Highly stable
- Utilizes integral connectors to form a near perfect airline
Keysight 911E Specs
||3 to 26.5 GHz (usable to 33 GHz)
|Load stability (plus connector and air line)
|3 to 20 GHz
|20 to 26.5 GHz
|Load element travel
||Half of a wavelength at 3.0 GHz (5 cm minimum)
||25.6 cm (10.1 in)
||120 g (4.25 oz)
||Equipment Storage and Shipping
||+15 °C to +35 °C (or network analyzer operating temperature range, whichever is less)
||-40 °C to +70 °C
||<80% relative humidity at 40 °C
||<90% relative humidity at 40 °C
||<4,570 m (15,000 ft)
||<15,300 m (50,000 ft)