Main features. System configurations. I Compact Range SOLUTION FOR

Transcription

1 Compact Range

2 + Direct far-field measurement of electrically large antennas SOLUTION FOR Antenna measurement Radome measurement RCS measurement A Compact Range makes direct far-field measurement of electrically large antennas in a shielded anechoic chamber. It uses a large parabolic reflector to project a small radiating source (feed) into the far field. Multiple-feed systems may be used to improve the far-field characteristics. The system also allows system level testing of the complete device architecture. Main features Technology Compact Range Measurement capabilities Gain and directivity 2-D and 3-D radiation pattern Beamwidth Sidelobe levels Radiation pattern in any polarization (linear or circular) and cross-polarization Radome measurements RCS measurements EIRP and G/T (requires additional RF instrumentation) Frequency bands Small: GHz* Medium: 700 MHz GHz* Large: 700 MHz GHz* Quiet Zone Dimension of Reflectors Small From 0.3 m Ø to 1.2 m Ø From 1 ft Ø to 4 ft Ø Medium From 1.8 m Ø to 3 m Ø From 6 ft Ø to 10 ft Ø Large From 3.6 m Ø to 6 m Ø and larger From 12 ft Ø to 20 ft Ø and larger Max. size of DUT During a full rotation of the DUT, the radiating parts of the DUT must stay within the quiet zone. If accuracy enhancement methods are desired or required, additional space may be needed for the implementation of Antenna Pattern Comparison (APC) and other methods. Max. weight of DUT 10 to 100 kg for small size system 100 to 1000 kg for medium size system 1000 kg and more for large size system Typical dynamic range 50 to 80 db, depending on antenna gain, frequency and RF instrumentation System configurations Software Measurement control, data acquisition and post processing 959 Spectrum (North America only) MiDAS Equipment Shielded anechoic chamber** RF absorber DUT positioner (Roll /Tower/Slide/Azimuth) Reflector system Feed horn (one horn, any band from 4 to 40 GHz) Feed positioner (polarization positioner / manual slide) Data acquisition workstation Rotary joints RF cables Real time controller (RTC) Remote mixing RF equipment Uninterruptable power supply Vector network analyzer Add-ons Feed horns (additional bands) Feed carousels for 3, 4, 5 or more feeds RF signal switching and conditioning Elevation squint adjustment Elevation for pickup Accessories Standard gain horns Mounting fixtures Services Installation Training Warranty Post warranty service plans*** ** See MVG-EMC Systems catalogs Included Optional Required for more information *** Refer to Orbit/FR service brochure for more information * For higher and lower frequencies, contact your MVG Sales representative 101 2

3 System overview CR Reflector VNA 959 Spectrum or MiDAS Workstation 5 Feed Positioner RF Signal Switch & Control (optional) DUT Positioner Positioner Controller INSTRUMENTATION ROOM CHAMBER A Compact Range operates like a regular far-field range, however it allows electrically large antennas to be measured at a significantly shorter distance. Its lowest operational frequency is determined by the size of the reflector, the edge treatment and the absorbers. The two edge treatments available are serrated edge for general purpose applications, and rolled edge to achieve higher accuracy for special applications (e.g. extremely accurate low sidelobe measurements). Shielding is optional. The performance of a Compact Range improves over frequency up to a level determined by the manufacturing accuracy of the compact range reflector. Considering the small sizes of high frequency antennas, the upper frequency can be well above 100 GHz. The performance of the Compact Range improves in relation to the increase in frequencies to be measured yet is limited to the level determined by the manufacturing accuracy of the reflector. The RF transmit/receive system is supported by a VNA. Depending on the size of the range, an amplifier may be required. Above certain frequencies, a remote mixing configuration is required to avoid high RF cable losses at higher frequencies. Dual polarized feeds and multiple channel DUTs can be handled by optional RF switches and the OFR 9800A high speed switch controller. The data acquisition workstation is equipped with either the 959 Spectrum or MiDAS software, depending on location. Both software packages are powerful data acquisition and analysis tools

4 Standard system components Absorbers and Anechoic Chambers An optimized combination of standard, adapted and specialty absorbers Size of anechoic chamber is based on selected quiet zone size - Shielding optional AEMI absorber catalog Reflector System Double curved reflector, optional cross-polarization enhancement hardware Side-fed, floor-fed or diagonal-fed systems, and Serrated edge or rolled edge Feed Positioner Consists of a polarization positioner and a linear slide that allows non-standard feeds to be positioned exactly at the focal point Feeds for different frequency bands may easily and repeatedly be changed using a standardized mechanical interface Multiple feeds can be mounted simultaneously using an optional feed carousel or feed robot. Special feed assemblies are available for improved cross-polarization ORBIT/FR positioning equipment catalog System specifications TYPICAL COMPACT RANGE SYSTEMS DUT Positioner A regular far-field antenna positioner, typically roll-overslide-over-azimuth with an optional lower elevation axis for pick-up or an optional upper elevation or squint for boresight alignment. A complete range of rotary positioners and model towers are available with air cushion (optional) ORBIT/FR positioning equipment catalog Feed Antennas A selection of compact range horns utilize a corrugated aperture design producing the rotationally symmetric patterns required for proper illumination of the compact range reflectors MVG antenna catalog SMALL MEDIUM LARGE Quiet Zone Size 1,2 m 3,0 m 4,8 m Quiet Zone Size 4 ft 10 ft 16 ft Frequency Range GHz GHz GHz Shielded Anechoic Chamber Size, W x L x H 5.1 x 9 x 5.1 m 11 x 21 x 11 m 17 x 34 x 17 m Shielded Anechoic Chamber Size, W x L x H 17 x 30 x 17 ft 37 x 70 x 37 ft 56 x 113 x 56 ft Absorbers (sidewalls), typical AEP-12 AEP-24 AEP-24 DUT POSITIONER Azimuth AL-860 AL-1260 AL-1760 Model Tower AL AL AL Roll AL-360-1P AL-760-1P AL P Load 68 kg 455 kg 1360 kg Bending Moment 41 kg.m 415 kg.m 1660 kg.m Load 150 lbs 100 lbs 3000 lbs Bending Moment 300 ft-lbs 3000 ft-lbs ft-lbs RF INSTRUMENTATION VNA, typical 2-18 GHz GHz GHz Remote Mixing, typical GHz GHz GHz 103 4

5 ORBIT/FR serrated-edge reflectors series System specifications* AL AL AL AL AL AL AL AL Quiet Zone Shape CC EC EC CC CC EC CC CC Frequency Range GHz GHz GHz GHz GHz GHz GHz GHz Quiet Zone Dimensions 1.2x1.2x1.2 m 1.2x1.8x1.8 m 1.5x2.4x2.4 m 1.8x1.8x1.8 m 2.4x2.4x2.4 m 2.4x3.6x3.6 m 3.0x3.0x3.0 m 3.6x3.6x3.6 m (HxWxL) 4x4x4 ft 4x6x6 ft 5x8x8 ft 6x6x6 ft 8x8x8 ft 8x12x12 ft 10x10x10 ft 12x12x12 ft Cross Polarization (typ.) -30 db -30 db -30 db -30 db -30 db -30 db -30 db -30 db Amplitude Total Variation 2.2 (2-5) db 2.2 (2-4) db 2.2 (2-4) db 2.2 (2-4) db 2.2 (1-2) db 2.2 (1-2) db 2.2 (0.8-2) db 2.2 (0.8-2) db Amplitude Taper 1.0 (> 5) db 1.0 (> 4) db 1.0 (> 4) db 1.0 (> 4) db 1.0 (> 2) db 1.0 (> 2) db 1.0 (> 2) db 1.0 (> 2) db Amplitude Ripple ± 0.6 (5-12) db ± 0.6 (4-8) db ± 0.6 (4-8) db ± 0.6 (4-8) db ± 0.6 (4-8) db ± 0.6 (2-4) db ± 0.6 (2-4) db ± 0.6 (2-4) db ± 0.4 (12-18) db ± 0.4 (8-12) db ± 0.4 (8-12) db ± 0.4 (8-12) db ± 0.4 (8-12) db ± 0.4 (4-8) db ± 0.4 (4-8) db ± 0.4 (4-8) db ± 0.3 (18-40) db ± 0.3 (12-40) db ± 0.3 (12-26) db ± 0.3 (12-26) db ± 0.3 (12-26) db ± 0.3 (8-20) db ± 0.3 (8-20) db ± 0.3 (8-20) db ± 0.4 (40-100) db ± 0.4 (40-100) db ± 0.4 (26-100) db ± 0.4 (26-100) db ± 0.4 (26-100) db ± 0.4 (20-100) db ± 0.4 (20-100) db ± 0.4 (20-100) db Phase Total Variation 16 (2-5) 16 (2-4) 16 (2-4) 16 (2-4) 16 (2-4) 16 (1-2) 16 (0.8-2) 16 (0.8-2) 0.25 * f (> 40) 0.25 * f (> 40) 0.4 * f (> 26) 0.4 * f (> 26) 0.4 * f (> 26) 0.5 * f (> 20) 0.5 * f (> 20) 0.5 * f (> 20) Phase Taper ± 2 (5-40) ± 2 (4-40) ± 2 (4-26) ± 2 (4-26) ± 2 (4-26) ± 2 (2-20) ± 2 (2-20) ± 2 (2-20) Phase Ripple ± 5 (5-40) ± 5 (4-40) ± 5 (4-26) ± 5 (4-26) ± 5 (4-26) ± 5 (2-20) ± 5 (2-20) ± 5 (2-20) CC = Circular Cylinder EC = Elliptical Cylinder ORBIT/FR roll-edge reflectors series System specifications* AL AL AL AL AL AL AL AL AL AL Quiet Zone Shape CC CC CC CC CC CC CC CC CC CC Frequency Range GHz GHz GHz GHz GHz GHz GHz GHz 1-40 GHz 1-40 GHz Quiet Zone 0.3x0.3x0.3 m 0.6x0.6x0.6 m 0.9x0.9x0.9 m 1.2x1.2x1.2 m 1.8x1.8x1.8 m 2.4x2.4x2.4 m 3.0x3.0x3.0 m 3.6x3.6x3.6 m 3.6x4.8x4.8 m 6.0x6.0x6.0 m Dimensions (HxWxL) 1x1x1 ft 2x2x2 ft 3x3x3 ft 4x4x4 ft 6x6x6 ft 8x8x8 ft 10x10x10 ft 12x12x12 ft 12x16x16 ft 20x20 x20 ft Cross Polarization -30 db -30 db -30 db -30 db -30 db -30 db -30 db -30 db -25 db -25 db (typ.) Amplitude Total 1.9 (8-12) db 1.9 (4-6) db 1.9 (3-4) db 1.9 (2-3) db 1.9 (1.5-2) db 1.9 (1-1.5) db 1.9 ( ) db 1.9 (0.7-1) db 1.9 (1-2) db 1.9 (1-2) db Variation 1.7 (12-18) db 1.7 (6-8) db 1.7 (4-6) db 1.7 (3-4) db 1.7 (2-3) db 1.7 (1.5-2) db 1.7 (1.5-2) db 1.7 (1-1.5) db 1.9 (1-2) db 1.9 (1-2) db Amplitude Taper 1. 0 (> 18) db 1.0 (> 8) db 1.0 (> 6) db 1.0 (> 4) db 1.0 (> 3) db 1.0 (> 2) db 1.0 (> 2) db 1.0 (> 1.5) db 1.0 (> 2) db 1.0 (> 2) db Amplitude Ripple ± 0.4 (18-26) db ± 0.4 (8-12) db ± 0.4 (6-8) db ± 0.4 (4-6) db ± 0.4 (3-4) db ± 0.4 (2-3) db ± 0.4 (2-3) db ± 0.4 (1.5-2) db ± 0.4 (2-3) db ± 0.4 (2-3) db ± 0.3 (26-40) db ± 0.3 (12-40) db ± 0.3 (8-40) db ± 0.3 (6-26) db ± 0.3 (4-26) db ± 0.3 (3-20) db ± 0.3 (3-20) db ± 0.3 (2-20) db ± 0.3 (3-20) db ± 0.3 (3-20) db ± 0.4 (40-100) db ± 0.4 (40-100) db ± 0.4 (40-100) db ± 0.4 (26-100) db ± 0.4 (26-100) db ± 0.4 (20-100) db ± 0.4 (20-100) db ± 0.4 (20-100) db ± 0.4 (20-40) db ± 0.4 (20-40) db Phase Total Variation 12 (8-12) 12 (4-6) 12 (3-4) 12 (2-3) 12 (1.5-2) 12 (1-1.5) 12 (1-1.5) 12 (0.7-1) 12 (1-1.5) 12 (1-1.5) 10 (12-18) 10 (6-8) 10 (4-6) 10 (3-4) 10 (2-3) 10 (1.5-2) 10 (1.5-2) 10 (1-1.5) 10 (1.5-2) 10 (1.5-2) 0.25 * f (> 40) 0.25 * f (> 40) 0.25 * f (> 40) 0.4* f (> 26) 0.4 * f (> 26) 0.5 * f (> 20) 0.5 * f (> 20) 0.5 * f (> 20) 0.5 * f (> 20) 0.5 * f (> 20) Phase Taper ± 3 (18-26) ± 3 (8-12) ± 3 (6-8) ± 3 (4-6) ± 3 (3-4) ± 3 (2-3) ± 3 (2-3) ± 3 (1.5-2) ± 3 (2-3) ± 3 (2-3) ± 2 (26-40) ± 2 (12-40) ± 2 (8-40) ± 2 (6-26) ± 2 (4-26) ± 2 (3-20) + 2 (3-20) + 2 (2-20) ± 2 (3-20) ± 2 (3-20) Phase Ripple ± 3 (18-40) ± 3 (8-40) ± 3 (6-40) ± 3 (4-26) ± 3 (3-26) ± 3 (2-20) ± 3 (2-20) ± 3 (1.5-20) ± 3 (2-20) ± 3 (2-20) CC = Circular Cylinder EC = Elliptical Cylinder 104 5

6 Typical field probing performance of AL Amplitude (db) 0,5 0-0,5-1 -1,5-1,5-1 -0,5 0 0,5 1 1,5 5 Phase (deg) 2,5 0-2,5-5 -1,5-1 -0,5 0 0,5 1 1,5 Cross-range (m) Horizontal and Vertical field probe cut, 18 GHz Feed positioner with a serrated-edge reflector A new Compact Range facility at the Georgia Tech Research Institute in Atlanta ( Copyright MVG 2014 Product specifications and descriptions in this datasheet are subject to change without notice. Actual products may differ in appearance from images shown