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Antenna Range Technical Data

General Characteristics of Mesa Antenna Ranges

Range Name
Range Length
Operating
Frequency
Measurements
Test Positioner

212 East

0-130 ft.

UHF to K-Band

Radiation patterns and gain

Polarization with traverse table over azimuth on cart

212 West

0-650 ft.

UHF to K-Band

Radiation patterns and gain

Polarization over elevation over azimuth on powered cart, 20 ft mast

256 East

0-68 ft.

UHF to K-Band

Radiation patterns and gain

Polarization with traverse table over azimuth, 20 ft mast

40 ft. Anechoic Chamber

19 ft. Test Area

X to W-Band

Radiation pattern and gain using cylindrical near field techniques

Azimuth

60-ft Anechoic Planar Near-field

15 ft. x 30 ft. scan area

L-band to Ka-band

Radiation pattern and gain using planar nearfield technique

Fixed antenna mount

60-ft Anechoic Farfield Range 0-50 ft. X-band to Ka-band Radiation pattern and gain using farfield or spherical techniques Polarization with traverse table over azimuth

1200 ft. Range

1200 ft.

UHF to W-Band

Radiation patterns and gain

Azimuth over elevation over azimuth

3000 ft. Range

3000 ft.

UHF to W-Band

Radiation patterns and gain

Heavy duty polarization over elevation over hydraulic elevation over azimuth

Large Bell Jar Breakdown Facility

6 ft. Test Cell

UHF to K-Band

RF High Power breakdown

6 Ft. Bell Jar in anechoic screened room

Small Bell Jar Breakdown Facility 14" cell UHF to Ka-Band RF High Power breakdown 14" DIA x 20" Bell Jar

243A

15 ft.

X to Ka-Band

Radiation patterns and gain

Polarization with traverse table over azimuth

243B

0-18 ft.

X to K-Band

Transmission & reflection for Frequency Selective Surfaces

 Approx 1 m square zone

         



Approximate Maximum Test Antenna Aperture Size -- Nearfield Ranges

60-ft Anechoic Chamber

Antenna diagramThe planar nearfield range located in the 60-ft chamber collects data over a rectangular region in front of an Antenna Under Test (AUT) by using a mechanically actuated probe. Referring to the figure at right, the AUT size D, probe travel L, AUT/Probe separation Z and probe size P determine the angle Φ according to the equation L=D+P+2Z tan(Φ). The calculated far-field pattern of the antenna will be accurate in the region between ±Φ. The maximum probe travel L is 30-ft in the horizontal direction and 15-ft in the vertical direction. Typical AUT/Probe separation Z is between 3-6 wavelengths and probe size P~1 wavelength. A far-field pattern region of Φ=70 degrees is typical.

The far-field range positioner located in the 60-ft chamber has been used to perform spherical nearfield testing by collecting data over a spherical region around the AUT in conjunction with custom near-field to far-field software developed at JPL. This method provides complete angular coverage (except for a small exclusion region at the antenna mounting bracket). The maximum AUT size for spherical measurements is limited by the distance to the nearest wall in the range and the size of the chamber access door. For example, the 15-ft diameter Mars Science Laboratory (MSL) Cruise Stage mockup was measured in the chamber using the spherical near-field method.


40-ft Anechoic Chamber

The cylindrical nearfield range located in the 40-ft chamber collects data over a cylindrical region surrounding an Antenna Under Test (AUT) by using a mechanically actuated probe to scan in the vertical direction and a turntable to rotate the AUT. This method provides complete angular coverage in the azimuth direction, but does not cover conical exclusion regions above and below the AUT. The angle Φ that defines these exclusion regions is determined as described above for the planar nearfield system. For the cylindrical scanner, probe travel L is 150 inches. The maximum antenna size is constrained by the distance from the turntable’s axis of rotation to the chamber walls, approximately 9 feet.

 

Approximate Maximum Test Antenna Aperture Size -- Farfield Ranges
equation              
 
60’ Anechoic
256 East
212 East
212 West
1200 Ft.
3000 Ft.
243
0.5 GHz

1.7 m*

2.5 m

3.5 m*

7.8 m*

10.5 m*

17.0 m*

1.2 m*

1.0 GHz

1.2 m*

1.8 m

2.5 m

5.6 m*

7.5 m*

12.5 m*

83 cm*

2.3 GHz

77 cm

1.2 m

1.6 m

3.7 m

4.9 m*

8.1 m

54 cm*

8.5 GHz

40 cm

60 cm

90 cm

1.9 m

2.6 m

4.2 m

28 cm

16.5 GHz

29 cm

40 cm

60 cm

1.4 m

1.8 m

3.2 m

20 cm

30.0 GHz

22 cm

33 cm

46 cm

1.0 m

1.4 m

2.2 m

15 cm

60.0 GHz

15 cm

23 cm

32 cm

73 cm

98 cm

1.6 m

11 cm

95.0 GHz
     

 

1.4 m

   
*May not be practical, each case will need to be evaluated.