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Compact Antenna Test Range Solutions

NSI Compact Antenna Test Range Solutions

Description:

NSI offers a line of Compact Antenna Test Ranges (CATR) with serrated edge terminations for quiet zones ranging from 1 ft x1 ft to 6.5 ft x 6.5 ft (0.3 m x 0.3 m to 2 m x 2m). These test systems can operate from 2–200GHz, depending on the RF subsystem installed.

The reflectors have a surface tolerance of < 2 mil (0.051 mm)  RMS.  Reflectors with larger QZ sizes (4 – 6 ft) are available in a wholly carbon fiber construction, allowing for a lightweight reflector with substantially improved tolerance to any thermal instability in the chamber. The serrated terminations can be customized for particular test applications.

NSI CATR feeds are available to cover the entire 2 – 200 GHz band and were optimized to uniformly illuminate the reflector. The feeds are choked cylindrical waveguide, linearly polarized and are available in standard waveguide bands.  Polarization rotation is achieved through automated rotation, and feed position can be further optimized utilizing tilt angle adjustment. The feeds and the feed positioner are mounted on a low profile feed support enclosure, which helps suppress back radiation.

Capabilities

The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from L-band to mm Wave bands. The system includes NSI Antenna Measurement Software.

The system software runs on an Intel based measurement workstation and provides automatic setup of scans based on measurement parameters and desired output. Measured data can be processed for far-field yielding complete characterization of the antenna’s performance. A single data set provides information on antenna gain, side lobes structure, beam pointing and cross polarization.

NSI includes probing of the quiet zone to determine its performance at the time of installation.
NSI offers an optional spherical near-field upgrade to most compact antenna test ranges solutions, which allow for effective testing in lower-frequency bands.

Product Range

Model Number

Quiet Zone Size

Frequency Range [GHz]

Amplitude Taper

Amplitude Ripple
(
<40 GHz)

Phase Variation
(<18 GHz)

Focal Length

NSI-CR-1x1

1 ft x 1 ft

(0.3 m x 0.3 m)

8  - 200

< 1dB

+/- 0.5dB

<10°

4 ft

(1.2 m)

NSI-CR-2x2

2 ft x 2 ft

(0.6 m x 0.6 m)

4  - 200

< 1dB

+/- 0.5dB

<10°

7 ft

(2.1 m)

NSI-CR-3x3

3.3 ft x 3.3 ft

(1 m x 1 m)

4  - 200

< 1dB

+/- 0.5dB

<10°

7 ft

(2.1 m)

NSI-CR-4x4

4 ft x 4 ft

(1.25 m x 1.25 m)

4  - 200

< 1dB

+/- 0.5dB

<10°

12 ft

(3.7 m)

NSI-CR-5x5

5 ft x 5 ft

(1.5 m x 1.5 m)

2  - 200

< 1dB

+/- 0.5dB

<10°

12 ft

(3.7 m)

NSI-CR-6x6

6.5 ft x 6.5 ft

(2.0 m x 2.0 m)

2  - 200

< 1dB

+/- 0.5dB

<10°

12 ft

(3.7 m)

Features:

High Surface Accuracy <0.002”(0.051 mm) RMS
Customizable serration design

L-Band to mmWave Measurements
Far-field, Near-field and Holographic Patterns
Spherical Near-Field Option Available

SPECIFICATIONS
Reflector  
Construction
Complete carbon fiber construction / Aluminum (depending on model)
Quiet Zone Size
Up to 6.5 ft x 6.5 ft (2 m x 2 m)
Surface Quality
<0.002” (0.051 mm) RMS
Serrations
Customizable up to 30” (760 mm)
Feed Positioner  
Drive System
Precision Stepper Motor; Rack and Pinion
Resolution
0.002°
Position Repeatability
0.03” (0.05 mm) RMS
Capacity
130 lb (60 kg) maximum recommended
Absorber Treatment
1.5” (38 mm) Broadband Microwave Convoluted Absorber
Sample Data:
Quiet Zone Amplitude Data : Horizontal Cut, Horizontal Polarization, 18 – 26.5 GHz
Quiet Zone Amplitude Data: Vertical Cut, Horizontal Polarization, 26.5 - 40 GHz

Options:

• Opt 100 - 220VAC 50 Hz Operation
• Opt 101- European Version
NSI-SW-5301 - Upgrade NSI Standard Edition Software to Professional
NSI-SW-5105 - Motion Tracking Interferometer (MTI) Software

For additional options and information see Scanner Options and Accessories