Ambient Terminations

Coaxial and Waveguide

Description

Maury ambient terminations are room temperature noise sources consisting of a stable termination in a massive copper housing to provide thermal stability and to reduce the effects of thermal transients.

These terminations are used as a reference temperature noise source for highly accurate noise figure or effective input noise temperature measurements, as an "on-line" standard for calibrating the operating noise temperature of low noise receiving systems, and in the calibration of solid state noise generators.

Each unit is provided with a direct reading dial thermometer calibrated from -5° to 45°C with better than 0.5° resolution and accuracy. The thermometer receptacle in the housing will also accept a quartz thermometer probe which, when connected to an appropriate unit, will provide for a remote temperature readout.

The units listed below are typical of those available. For terminations in other waveguide sizes, or other connector types and frequency ranges, please contact: The Maury Sales Department


Specifications

Model Frequency
Range (GHz)
Maximum VSWR (GHz)
Connector or EIA
Waveguide Size
2459A
DC - 8.5
1.02, DC - 1.0
14mm (GR900)
1.04, 1.0 - 4.0
1.06, 4.0 - 8.5
2659A
DC - 18.0
1.04, DC - 4.0
7mm (APC7)
1.08, 4.0 - 12.0
1.10, 12.0 - 18.0
R309B
2.2 - 2.3
1.05
WR430 1
E309A
3.7 - 4.2
1.05
WR229 1
X309A
8.2 - 12.4
1.05
WR90 2
M309A
10.0 - 15.0
1.05
WR75 3
P309A
12.4 - 18.0
1.05
WR62 2
K309A
18.0 - 26.5
1.10
WR42 2
J309A
33.0 - 50.0
1.15
WR22 2
U309A
26.5 - 40.0
1.10
WR28 2
1 Flange mates with the applicable CPR flange.
2 Flange mates with the applicable military (UG) flange.
3 Flange mates with most applicable standard military and industrial flanges.

Application Notes and Data Sheets

4C-008A

Technical Data - Model 2659A - 7mm (APC7) Coaxial Ambient Termination

3A-309

Technical Data - Model Series 309 - Precision Ambient Waveguide Termination

Full Catalog

Download or View Online