Electromagnetic Anechoic Box /Shield Box Small/Medium Size ME8661A

Optimum for testing W-CDMA, GSM and wireless systems. A receiving antenna of your choice will be installed.

  • Suitable for testing W-CDMA, CDMA, GSM, PDC, PHS, ETC and wireless systems.
  • A receiving antenna of your choice will be mounted.

Specification

This is a simple type shielding box that may be used on a desk.

It is of triple structure, i.e., radio wave absorber, copper plate and aluminum plate.

It covers the frequency band of low frequency through 18GHz.

[Structure]

Figure:Structure of ME8661A

Outside Dimensions(approx.) 820(W)×608(H)×503(D)mm (excluding projections)
Inside Dimensions 700(W)×380(H)×380(D)mm
Acrylic resin table 200×200mm
Weight approx.38㎏ (excluding antenna)
Structure Triple structure composed of radio wave absorber, copper plate and aluminum plate
Shielding Characteristics(typ) 65dB@2.4GHz
Reflection loss more than 20dB@1.2GHz
Connectors
  • SMA (3pcs)
    (reference side 1pc, receiving side 2pcs)
  • 25 pins D-sub connector 1pc
Option
  • Receiving antenna
  • Reference antenna(with antenna gain and RF coupling degree data)
  • Receiving horn antenna
  • Reference horn antenna(with antenna gain and RF coupling degree data)
  • Microwave coaxial cable(0.5 m, 3m, 4m)
  • Fixed microwave attenuators(1 to 10、12、13、15、20dB)
  • 50ΩTerminator(SMA)
  • 50Ω-75ΩAdapter BNC(P)-BNC(J)
  • Adapter
    • BNC(P)-N(J)
    • BNC(P)-N(P)
    • BNC(P)-F(J)
    • BNC(P)-F(P)
  • Caster

Reference antenna

Reference antenna Spiral antenna

  • Photo:Reference antenna Spiral antenna

    Reference antenna Spiral antenna

    Frequency range 2 to 18GHz
    Antenna gain -2 to +6dBi(with data)
    VSWR Less than 2
    Polarization Right circular
    Max. input power 1W @ CW
    Application For OBE of ETC

    *Receiving antenna model (Spiral antenna) is same specifications as above.

Reference antenna Horn antenna

  • Photo:Reference antenna Horn antenna

    Reference antenna
    Horn antenna

    Frequency range 2 to 5GHz
    Antenna gain +12.5 to +17dBi(with data)
    VSWR 1.4 (typ.), 3.0 (max.)
    Polarization Linear
    Max. input power 200W @ CW
    Application Cellular phone, PHS

    *Receiving antenna model (Horn antenna) is same specifications as above.

Reference antenna Log periodic antenna

  • Photo:Reference antenna Log periodic antenna

    Reference antenna
    Log periodic antenna

    Frequency range 0.75 to 2GHz
    Antenna gain +0.5 to +10dBi(with data)
    Polarization Linear
    Application Cellular phone, PHS

    *Receiving antenna model (Log periodic antenna) is same specifications as above.

Reference antenna Portable antenna

  • Photo:Reference antenna Portable antenna

    Reference antenna
    Portable antenna

    Frequency range 300MHz to 6.2GHz(M301-309 According to each specification.)
    Antenna gain 2.15dBi(with data)
    VSWR Linear
    Polarization Cellular phone, Wireless LAN, Bluetooth, etc.

    *Receiving antenna model (Portable antenna) is same specifications as above.

Applications

Application1 : Wireless system test

With a W-CDMA, CDMA, GSM, PDC, PHS, OBE of ETC, wireless LAN, Bluetooth and wireless communication equipment, it is possible to test the wireless system in a free space that is close to actual working conditions (testing of transmission power, transmission frequency, spurious, occupied bandwidth, carrier-off leakage power, adjacent channel power, modulation factor, transmission eye pattern, etc.).

Figure:ME8661A Wireless system test

This wireless system test is done in the state where a test sample is placed on the acrylic resin table (200 mm × 200 mm) in ME8661A as shown above, a receiving antenna is mounted in a position that is opposed to the test sample the output of a receiving antenna is connected to a spectrum analyzer, microwave wattmeter or the like. Therefore, an optional receiving antenna is needed for conducting this test.

Two optional receiving antenna models, i.e., Model A and Model B, are available. It is, however, also possible to mount an antenna of different specification, if the frequency band and polarization are appropriately specified.

A distance of 30 cm or greater may be provided between the test sample and the receiving antenna. An optional reference antenna is used for calibration of RF coupling degree (loss between front face of test sample and SMA connector of receiving antenna output).

Antenna gain and frequency characteristics data of RF coupling degree are appended to this reference antenna. Although the antenna itself is the same whether a reference antenna or a receiving antenna, a reference antenna is provided with a fixing stand made of acrylic resin, so that it can be placed on the acrylic resin table.

Application2 : Antenna test

Connect a signal source to the reference antenna connector and connect a measuring instrument to the receiving antenna connector. Having done this, antenna characteristics data can be acquired.

Application3 : Electromagnetic anechoic box

Capable of using as a mere electromagnetic anechoic box without mounting antenna. It is optimum for simple preliminary experiments for EMC testing and when it is wanted to conduct a test shielded from the external magnetic field.

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