Far Field Antenna Measurement System

Far Field Antenna Measurement System

Features:
  • EMI/EMC, Antenna & RCS Measurements
  • Low cost solution to anechoic chamber.
  • Reflected signal (reaching test zone) down by min -30dB with respect to direct signal.
  • Low RCS stand (FRP Rod and holding devices) to hold transmitting/ receiving antenna
  • Antenna under test / RCS measurement target stand on a stepper motor monopod with 3D plotting.
  • Five-side PU Foam absorber covered Aluminum Clad Frame.
  • Special corner block absorbers used.
  • PU Absorbers are high performance Pyramidal Microwave absorbers constructed using low density,flexible foam impregnated with carbon formulation.
  • Suitable type optimum performing absorbers at near normal/grazing incidences of extraneous signals used.
  • Specially shaped absorbers for transmitting and receiving (Pyramids for Transmitting and Wedges for
    receiving).
  • Custom tailored solution, other size boxes, anechoic rooms can be provided.
  • The pyramidal structure gives it the geometrical matching and carbon dispersed gives high attenuation.
  • Suitable for 800 MHz to 20GHz and higher frequencies. Performance (Reflection Loss) at lower frequencies shall be deteriorated, like at 500MHz it will be -20dB only)
  • Fire retardant and Zero halogen.
  • Comprehensive Testing Validation report available.
Areas of Application
  • Suitable for Microwave and Antenna labs.
  • Measurement of radio noise emission.
  • Making screens for hiding area of maximum reflections.
  • For obtaining Quiet zones in very wide frequency range.
  • Wedge shaped absorbers have maximum performance at grazing incidence angles.
  • Designed in view of requirements of educational institutes.
  • Necessary attachment for Antenna/Microwave Trainers.
  • Accurate antenna pattern/RCS Measurements.
Intended Measurements:
  • Azimuth antenna Pattern: 360 degree.
  • Relative/Absolute Gain Measurements of Antenna whose gain range from 0 dBi to +20 dBi or more.
  • RCS Measurements (both monostatic and bistatic) to be carried out from 1GHz to 40 GHz.
  • Bistatic Measurements are from +/- 20 degree from monostatic
  • Chamber may be used for circular polarization and rotating linear polarization.
  • Bore sight measurements can be carried out.
  • Radome error measurements can be carried out.
  • Radiated emission (RE) and radiated susceptibility (RS) test of equipment under test per MIL- STD461 E/F.
  • Suitable for MIMO (Multiple Input Multiple Output), OTA (Over The Air),LTE (Long Term Evolution) lab of mobile and systems testing per ETSI (European Telecommunication Standard Institute).
  • Chamber Size: 7.8m X 5.4m X 3.6m (Typical Room Dimension) (LengthX WidthX Height)
  • Shielding Effectiveness (SE): Min. –100 dB from 500 MHz to 1.0 GHz and min. –80 dB from 2.0- 18.0 GHz.
  • Shielded Structure: Modular PAN type maintenance free with 2mm GI sheet structure.
Hardware Technical Specifications:
  • Design, Supply, Installation and Validation of EMI/EMC,Antenna Near Field/Far Field RCS Test Range and
    Mobile test lab.
  • Frequency Region: 80MHz to 40.0 GHz
  • Purpose: EMI/EMC, Antenna and RCS Measurements and MIMO/OTA/LTE lab per ETSI for mobile & system
    testing.
  • RF Shielded Structure:Modular PAN Type structure maintenance free structure made of 2mm thick GI sheet joined with wire mesh gaskets of size 7.8m x 5.4m x 3.6m. RF Shielded Door:
    Shielded door of size 2100mm x 900mm size with 3 rows of Cu- Be finger stocks around be provided.
  • Power Line Filter:1 Nos. Power line filter of 1 Phase, 50Hz, 250 Volt and 30A.
  • Threaded brass ground stud – ½” (M12) by 5” long (1.3cm x 12.7cm)
  • Lighting: 4 Nos.Single source fiber optic LED light fixtures.
  • CCTV:A CCTV camera is supplied/installed to monitor the movement inside the chamber.It consists LCD High resolution monitor of Reputed make having 24” size.
  • System supplied is not EMI/EMC hardened which is required by test lab working at low frequency (~10 KHz)
    Magnetic field (low impedance) testing.
  • Ventilation: 2 Nos.
  • Wave guide air vents of size 300mm x 600mm.
  • Access Panel with connectors:Access panel of size 300mm x 300mm to be provided with following connectors.
    1. N-type (f-f) 4 nos. 2.SMA (f-f) 4 nos.
  • Absorbers:PU foam based Pyramidal FU-SE-24 and corner absorber. FF- 150 to be used as required.
  • Pyramidal absorbers will be Fire retardant per NRL-8093 Meeting Tests 1, 2 & 3 With Zero Halogen Means.
  • Data sheet of Pyramidal Absorber is attached for your perusal. FU-SE-24 absorbers also meets MIL-STD- 461 E requirements.
  • Design and Installation:Chamber design.
  • Installation of shielded chamber and absorbers.
  • Dual Ridge Horn Antenna DRH20 -2Nos.
  • Frequency Range: 1-18GHz
  • Gain(Typ.): 8.5dBi
  • Polarization: Linear
  • VSWR (Type.): <2:1
  • 3dB Beam width: 52-24 degree
  • Net Weight: 1.1Kgs
  • Connector: N type Female
  • Mounting Bracket: Aluminum right angled plates.
Advantages of Total Steel Structure TSS
  • (TSS/ PAN type structure) over Wood Core Structure (WCS) for ShieldedEnclosure.
  • Different thermal expansion or contraction of wood w.r.t GI threatens the Shielding Effectiveness of WCS rooms due to differential stresses thus loosening the joints and need to be maintained regularly which is very cumbersome process.
  • TSS is not affected by water and moisture, which play havoc with WCS system.WCS room has many leak points (screws both surfaces of hat and flats and any joints areas of inter section). TSS has only one point of possible leakage (missing bolt) and still there is an RF gasket.
  • TSS is lighter in weight with fewer parts than wood core designs and very easy to assemble.TSS offers years of maintenance free, high RF attenuation.TSS is very desirable in geographic regions with seismic problems. A
    WCS room can break apart.TSS has higher fire-retardancy.
  • TSS can be easily disassembled and reassembled without deteriorations of Shielding Effectiveness. In WCS the disassembled panels will not seal properly after reassembling because the wood is compressed where it
    was clamped.
  • Performance of the Anechoic Chamber:Shielding Effectiveness (SE): Min. –100 dB from 500MHz to 1.0 GHz and min. –80 dB from 2.0 to 18.0 GHz. Modular PAN type maintenance free total 2mm steel sheet structure.
  • Quiet zone size/ Location/ Quietness / Equivalent RCS of Chamber.
  • SHIELDING EFFECTIVENESS and per free space VSWR method for quietness level. Advanced VSWR, RCS Method be used per the article entitled “Recent Microwave Absorber wall- Reflectivity Measurement Methods” appeared in “IEEE
  • Antenna & propagation Magazine” Vol.50, no:2, pp 140-147, 2008.
Area of Experimentation:
  • 3D & Cartesian Polar Plots- E & H Plane
  • Vertical Plane Plots – Ground Plane effect
  • Directive gain, Front to back ratio of Antenna.
  • Side lobe Level and its Angular Position
  • Beam width – Half Power (3dB) & 10 dB
  • Frequency Bandwidth of an Antenna
  • Study RF reflection loss and absorption loss properties of some sample absorbers.

Microwave Anechoic Chamber
  • Design, Supply, Installation and Validation of EMI/EMC, Antenna Near Field/Far Field RCS Test
  • Range and Mobile test lab.
  • Frequency Region: 80MHz to 40.0 GHz
  • Purpose: EMI/EMC, Antenna and RCS Measurements and MIMO/OTA/LTE lab per ETSI for mobile & system testing.
  • Intended Measurements:
  • Azimuth antenna Pattern: 360 degree.
  • Relative/Absolute Gain Measurements of Antenna whose gain range from 0 dBi to +20 dBi or more.
  • RCS Measurements (both monostatic and bistatic) to be carried out from 1GHz to 40 GHz.
  • Bistatic Measurements are from +/- 20 degree from monostatic
  • Chamber may be used for circular polarization and rotating linear polarization.
  • Bore sight measurements can be carried out.
  • Radome error measurements can be carried out.
  • Radiated emission (RE) and radiated susceptibility (RS) test of equipment under test per MIL- STD-461 E/F.
  • Suitable for MIMO (Multiple Input Multiple Output), OTA (Over The Air), LTE (Long Term Evolution) lab of mobile and systems testing per ETSI (European Telecommunication Standard Institute).
  • Chamber Size: 7.8m X 5.4m X 3.6m (Typical Room Dimension) (LengthX WidthX Height)
  • Shielding Effectiveness (SE): Min. –100 dB from 500 MHz to 1.0 GHz and min. –80 dB from 2.0-18.0 GHz.
  • Shielded Structure: Modular PAN type maintenance free with 2mm GI sheet structure.
List of Experiments
  1. Introduction
  2. To plot the radiation pattern of an omnidirectional antenna.
  3. To plot the radiation pattern of a directional antenna
  4. To measure axial ratio and cross polarization discrimination of vertically horizontally and circularly polarized antennas.
  5. To measure the VSWR of the antenna
  6. To demonstrate that transmitting and receiving patterns of an antenna are equal and hence confirm the reciprocity theorem of antennas
  7. To plot the radiation pattern (E & H Plane Polar & Cartesian Plots on Log/Linear scale of an antenna on PC.
  8. To measure the ANTENNA PARAMETERS (directivity, gain, beam width (Half Power/10dB), front to back ratio, plane of polarization, cross polarization discrimination,side lobe level and its angular position from polar plot, VSWR/return loss) of Dipole.
  1. To measure antenna parameters of Yagi.
  2. To measure antenna parameters of Slot.
  3. To measure antenna parameters of Transformer fed Patch and inset fed Patch.
  4. To measure parameters of right circularly polarized patch and left circularly polarized patch.
  5. To measure antenna parameters of Spiral & Spiral Slot.
  6. To measure the cross polarization discrimination for circular.
  7. To measure antenna parameters of Log Periodic.
  8. To measure antenna parameters of Circular patch.
  9. To measure antenna parameters of Folded Dipole.
  10. To measure antenna parameters of Loop.
  11. To measure parameters of Endfire and Broadside array.
  12. To measure antenna parameters of Patch array 2X2, and Dual Patch.
  13. To measure antenna parameters of monopole.
  14. To measure antenna parameters at 10.3 GHz of Pyramidal Horn (E plane Horn, H plane Horn and open waveguide antenna.
  15. To measure antenna parameters at 10.3 GHz of conical.
  16. To measure parameters at 10.3 GHz of monopole.
  17. To measure antenna parameters at 10.3 GHz of Slot Narrow Wall & Broad Wall slot Antenna
  18. To measure parameters at 10.3 GHz of Parabolic dish.
  19. To measure antenna parameters at 10.3 GHz of Patch array 4X4, Patch array 2X2, Dual Patch array, Inset fed Patch, Circularly Polarized Patch antenna
  20. To measure antenna parameters of Helix RHCP & LHCP.

SHIPPING LIST

Sr. No.LIST OF ITEMS SUPPLIED IN  FAR FIELD ANTENNA MEASUREMENT SYSTEMQty.
13 AXIS Stepper Motor1
2Stepper Motor Controller Unit + POWER CORD1
3non radiating TRIpod1
420 gHZ sma(m) – sma(m) ARMOURED cables 3m2
5SMA(m) – N(M) Adapters2
6SMA(f) – N(m) Adapters for network analyser2
7N(m) – N(f) right angle adapter2
8sma(f) – sma(f) adapters2
9N(m) – N(m) adapter2
10Ridge Horn2
11allen key1
12spanner 13/14 no.1
13universal l clamp1
14E- MANUAL INSTALLATION VIDEO + ANTENNA PLOTTING SOFTWARE CD1
15EXPERIMENTAL MANUAL1

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