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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


Model 2659A

Model K309B

Product Data Sheets

(click the links below to download PDF* copies):

4C-005 (44 KB) Technical Data - Model 2459A - 14mm (GR900) Coaxial Ambient Termination
4C-008 (36 KB) Technical Data - Model 2659A - 7mm (APC7) Coaxial Ambient Termination
3A-309 (52 KB) Technical Data - Model Series 309 - Precision Ambient Waveguide Termination

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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
-
23.0
1.05

WR62

2

K309A
21.0
-
23.0
1.05

WR42

2

J309A
33.0
-
50.0
1.05

WR22

2

U309A
36.0
-
38.0
1.05

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.

Copyright 2006 by Maury Microwave Corporation. All rights reserved.