5225 Access Point Test Enclosure

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ETS-Lindgren’s Model 5225 WLAN Access Point Testing System is a self-contained portable enclosure that allows the operator to conduit Over-The-Air (OTA) testing of an Access Points’ transmit and receive functionality of an Access Point and its throughput performance. The system uses a specially designed, circularly polarized micro strip patch antenna in the enclosure to interface with an Access Points’ RF antenna(s). The coupling coefficient has a flat response over the 802.11/b frequency range of 2.2 GHz to 2.6 GHz devices, and over the 802.11/a/g frequency range of 5.2 GHz to 6.0 GHz.

Using this shielded OTA interface test enclosure, the operator performs the test faster and simulates the real-world operational environment. The OTA test method provides a shorter signal path and readily detects a faulty antenna. The direct connection method bypasses the antenna and adds up to several dB of loss to the measurement. However, a connector is provided for direct cable connection, if desired.

Since polarization sensitivity is an important design parameter for WLAN interface devices, a circularly polarized micro-strip patch antenna is provided to transmit and receive RF signal for two orthogonal polarizations. The patch antenna can be accessed through a 50 ohm SMA connector port.

Electrical Specifications

Coupling Loss <20 dB for 2.2 GHz – 2.6 GHz
<30 dB for 5.0 GHz – 6.0 GHz
1. Using identical antennas at 10.6 cm (4) from antenna surface
Typical Coupling Loss Repeatability +/- 1 dB
Typical Internal RF Absorption 800 MHz – 2.6 GHz Q<2
Typical RF Isolation 2 GHz – 6 GHz > 80 dB

Key Features

  • Works with 802.11 Traffic Generator and Performance Analysers
  • Tests:
    -- Over-The-Air Performance of TX, RX
    -- Wireless LAN Access Point Throughput Performance
  • Flat Coupling Response over 2.2GHz - 2.6GHz, 5.2GHz - 6.0GHz

Application Notes