Atm Inc. - W/G Components -> Short, Sliding

Waveguide Sliding Termination		See Also: Waveguide Terminations
The 721 series sliding terminations are used in laboratory high precision measurements. They are also ideal for field measurements and production setups requiring low VSWR. The sliding load motion is controlled to a high degree of precision thru extremely accurate machining techniques. Travel of the termination is a minimum 1/2 wavelength at the lowest frequency enabling phase reversal. Provisions are provided to lock the termination at any position.

Rectangular W/G Sliding Termination, Low Power - 721 Series

TYPICAL SPECIFICATIONS

Electrical:

Full waveguide frequency range.
VSWR: See table below.
ATM Series 721 Terminations utilize a precision conical element to achieve very low VSWR.
Precision grade waveguide is used for the transmission line.

Mechanical:

Low out gassing characteristics.
Finish is a unique corrosion-resistant 316 stainless steel epoxy coating.

WG Size

Freq. (GHz)

VSWR
Max

Avg. Power
(Watts)

Standard
Model No.*

Minimum Travel
(Inches)

Dim A
(Inches)

WR430

1.70 - 2.60

1.020

8.0

430-721A-2

6.00

23.00

WR340

2.20 - 3.30

1.020

7.0

340-721A-2

4.50

18.00

WR284

2.60 - 3.95

1.020

5.0

284-721A-6

4.00

17.50

WR229

3.30 - 4.90

1.020

3.0

229-721B-2

3.00

13.50

WR187

3.95 - 5.85

1.020

3.0

187-721A-6

2.50

12.00

WR159

4.90 - 7.05

1.020

3.0

159-721B-2

2.00

11.00

WR137

5.85 - 8.20

1.020

2.0

137-721B-2

1.75

10.00

WR112

7.05 - 10.0

1.020

2.0

112-721B-6

1.60

9.00

WR102

7.00 - 11.0

1.025

2.0

102-721A-6

1.50

8.75

WR90

8.20 - 12.4

1.025

2.0

90-721A-6

1.30

8.00

WR75

10.0 - 15.0

1.025

2.0

75-721B-6

1.00

7.50

WR62

12.4 - 18.0

1.030

1.0

62-721B-6

0.75

6.50

WR51

15.0 - 22.0

1.040

0.5

51-721B-6

0.65

6.00

WR42

18.0 - 26.5

1.040

0.5

42-721B-6

0.55

5.50

WR34

22.0 - 33.0

1.040

0.5

34-721B-6

0.50

5.00

WR28

26.5 - 40.0

1.040

0.5

28-721B-6

0.45

4.50

Ordering Information	WR	- Mod	-M	-FG1
Waveguide Sliding Short
Example part number:	42	-721	B	-6
Waveguide Size: (WR) WR28 thru WR430
Basic Model No.: (-Mod)
Material (M): A=Aluminum, B=Brass
Flange (-FG1): 1=CPRG, 2=CPRF, 6=Cover, 7=Choke See ATM Standard Flange page for more info.

* The Standard Model Numbers above are the most common parts ordered for size, material and flange. However, these models can easily be altered to accommodate your needs by using the Model # code system to the left.

Waveguide Sliding Termination