ANECHOIC CHAMBER WITH POSITIONER SYSTEM

WAVETECH provide Anechoic Chambers for Measurement of RF properties of antennas. The chamber has been designed keeping in mind the requirement of UHF RF ID system components. We also use this chamber to carry out antenna measurements, Mono static/ Bi-static RCS measurements, near field measurements, Bore sight measurements, Radome testing etc. Anechoic chamber range rom small compartments the size of household microwave ovens to once as large as aircraft hangars. The size of chamber depends on the size o object and frequency ranges being tested.

LAYOUT OF ANECHOIC CHAMBER

COMPLETE SET UP COMPONENTS

• Comprise of RF Anechoic Chamber
• VNA instrument
• 1 Axis Transmitter positioner system
• 3 Axis Receiver Positioner System
• Measurement Software – Lab view based
• Reference Broadband Horn Antenna’s
• Antenna under Test
• PC for Interfacing

RF ANECHOIC CHAMBER(outer VIEW)

STRUCTURE MATERIALS AND DETAILS

• PAN Panel self supported structure will be provided.
• Made out of MS Pipes, GI Sheets and bolted structure.
• GI Sheet will be of standard brands - Tata Steel, JSW Steel, Essar Steel or similar.
• MS Pipe will be of standard brands – Apollo, A-one, Tata or similar.
• Welded structure and then bolted sheets and over that absorbers lining will be there.
• Outer aesthetics will be provided with Laminated sheets.

RF ANECHOIC CHAMBER(inner VIEW)

rf absorbers and details

• PU foam based RF Absorbers.
• Size (Height) varies from 3 inches (75 mm) to 36 inches (900 mm).
• Standard Base Size of 610 mm x 610 mm.
• Absorbers models are WFU4, WFU6, WFU9, WFU12,WFU18, WFU24,…..& so on.
• Walkway absorbers will be provided to access and move inside the chamber.
• Absorbers on all sides will get pasted with adhesive. Floor absorbers along with walkway will be placed and can be moved if required.

common features of rf absorbers

• Temperature resistant
• 0.5 Watt/in2 or 775 Watt/m2 Power Handling
• Long performance warranty
• Tested as per IEEE standards
• Fire retardant as per NRL 8093
• Long product life up to 20 years

pyramid absorbers

reflectivity table of ram

flat absorbers

• Flexible, light weight used in interference suppression applications.
• Available in standard base size of 2' x2' (60cmx60cm) and height from1 cm to 5cm.

walkway absorbers

• Low- density rigid polystyrene foam is used to encapsulate a standard pyramidal or wedge absorber.
• Walk on Absorber provide access to chamber to move and mount / replace the DUT.

rf doors

• Single knife edge door with both sides level.
• Door size will be 3 ft x 7 ft (WH).
• Be-Cu fingers at periphery and Gaskets at joints.
• Entry door to provide access to the chamber.
• Standard Hardwares for the door.

fire alarm system

• Fire Alarm system comprise of complete set including – Two Zone Digital control panel, two numbers of smoke detector, Hooter and Manual call-point.
• Detectors mounted inside and all control and power from outside the chamber. Panel and concerns mounted outside on wall of chamber.

led lights

• LED Surface lights – 24 V panel
• Standard Make – Orient, Havells, Polycab.
• White color light.
• Hanged with help of Rod / Brackets inside the chamber.
• Quantity will be calculated based on size of chamber & site requirement.

split air conditioner

• 1, 1.5, 2 tonne split AC will be provided (depends on site requirement ).
• Inner unit will be mounted inside the chamber.
• Water pipe and other pipe will be taken out through pipe penetration.
• Supply will taken from outside the chamber through EMI Filter.
• Standard Make – Carrier, Godrej, Samsung or equivalent.

emi filter

SINGLE PHASE FACILITY EMI FILTER MF420-2CF

Technical Specifications
datasheet

All dimensions are in mm

• EMI Filter will be 32 A, single phase, 2 wires.
• Lights, AC, electric points concern to chamber will be connected through EMI Filter.

cctv setup

key features

• 2MP high performance CMOS
• 1920×1080 resolution
• Full time color
• 3.6mm,6mm fixed lens
• Upto 40m white light distance
• OSD menu,3DDNR,trueWDR
• 4in1 video output(switchableTVI/AHD/CVI/CVBS)
• IP67
• Up the coax(HIKVISION-C)

• CCTV Set includes DVR, 2 Cameras, HDD, Power supply, LED Screen.
• Standard make – HikVision, CP Plus or equivalent.
• Total control and mounting outside on the wall of chamber and Cameras will be mounted inside chamber with help of Rods/Brackets.
• LED Screen of Size – 32 inches will be provided (as per client requirement). Standard make – AOC, Frontech, Fingers or Equivalent.

earthing

• Maintenance free Earthling.
• 3 mtr long copper rod will be burried in 10 ft long hole of size 100 mm.
• A well-designed Earthing system is essential for any electrical installation to avoid dangers associated with fault currents.
• Strip / 6 mm wire will be routed to connect Pit / line with chamber with help of Lugs.
• If earthling strip / point available near to the chamber room then we connect it further with the chamber.

1+3 axis position system including

3 axis reciever antenna positioner

• The System has the ability to adjust the antenna position in Azimuthal, Polarization & elevation directions.
• Synchronized with VNA for automatic measurements.
• Feature /software E & H Pattern combined to give 2D ,3D pattern.
• Angular Motion can be done in different step sizes and it is user selectable.
• Wide range of step sizes like from 0.09 deg to 0.18,0.9,2.7,5.4,18......any angle in multiple of 0.18 deg.
• Elevation & Polarization Movement will be + 90 degree.
• Able to move and minimize the distance between Tx & Rx.

1 Axis Transmitter Antenna Positioner

• The System has the ability to adjust the antenna position in Polarization directions.
• Mechanical / Laser alignment.
• Polarization movement from 0 to 360 degree.
• Height is adjustable can be adjusted same as Receiver.
• Maximum load Capacity : 15 kg

4 axis reciever positioner

Azimuth, elevation, Polarization same as 3-Axis positioner system including X-Axis extra movement 1 meter positive 50 centimeter and negative 50 centimeter, least count 1mm.

measurement parameters

• 2D E/H Radiation Pattern
• 3D Radiation Pattern
• Gain Measurement.
• RCS Measurement.
• Axial Ratio.
• Measuring the S-Parameters(S11,S12,S21 and S22)

lab view based single screen access

• Both plots & readings will be provided in single software window. Also you can see live changes in plot during measurement.
• Software is provided with Six select frequency & measurement option. For each frequency point you have to run the measurement again.
• Complete parameter measurements including 2D, 3 D pattern, Gain, Axial Ratio Graph plotting & Measurements.
• Interfaced with VNA & PC for automatic measurements.
• Single screen access to measurement & control, real time view too.

report & data save options

• The data will be saved in excel format in the particular Folder in PC .
• The Plots can also be accessed within the software w.r.t measurement parameter.
• User can retrieved the past data on the software for analysis.

control panel (drives, smps, controller)

control and communication

• Both Positioner control Panel and VNA controlled through LAN and provided with detailed operational manual.
• On command positioner will move and take reading at each step and in same way it complete the full rotation.
• Software customization is provided. User can add measurement terms by providing the particular details.

2d pattern

3d pattern

six freq patterns in single run

manual rotation of axis

hybrid stepping motors

• Hybrid stepper motors with different configurations will be provided.
• Stepper drives and PVC gear boxed will be used to reduce the step size to 0.09 degree.
• Motor will be of 2 coils, 4 wires and accordingly it get connected.
• Single screen access to measurement & control, real time view too.

reference horn antenna (0.5 to 1.5GHz)

• Frequency Range: 500 MHz – 1.5 GHz
• Antenna Type: Horn
• VSWR: 2.0 to 3.0 (Typ.)
• Connection Type: N (Female)
• Mounting brackets will be provided for Mounting.
• Gain file will be provided along with test reports & Readings.

broadband dual rig reference antenna 1 to 18 GHz

• Frequency Range : 1 GHz – 18 GHz.
• Input Power: up to 100 Watts CW/200 Watts for pulsated applications.
• VSWR: < 2.0 to 3.5 (Typ.)
• Gain: 4 dBi to 20 dBi (typ.)
• Connection type: SMA (Female).
• Mounting plates will be provided for Mounting.
• Antenna test report will be provided – with RL, VSWR, Radiation plots & Gain.

broadband dual rig reference antenna 18 to 40 GHz

• Frequency Range :18 to 40 GHz.
• Input Power: up to 100 Watts CW/200 Watts for pulsated applications.
• VSWR: < 2.0 (throughout the band).
• Gain: 10 dBi to 20 dBi (typ.)
• Connection type: 2.92 mm (Female).
• Mounting plates will be provided for Mounting.

ultra low loss rf cables dc to 40 GHz

• Frequency Range : 500 MHz to 40 GHz.
• Pre-connectorized Ultra Low Loss RF Coaxial Cable assembly for Ka band application.
• Impedance: 50 ohm
• Frequency: DC~40 GHz
• VSWR: ≤ 1.35:1
• Insertion Loss: ≤ 3.6 dB/m @40 GHz