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AMS-8500 Antenna Measurement System

AMS-8500  Antenna Measurement System

The ETS-Lindgren AMS-8500 Antenna Measurement System (AMS) packages are a series of turnkey solutions for making antenna measurements of portable wireless telecommunication devices.

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AMS-8500 Datasheet Product Datasheet

Description

The systems are fully configured to perform both research and development and type approval according to the recently published Cellular and Telecommunications and Internet Association (CTIA) test methods for portable transceivers. The system can also be used to perform antenna measurements in both near and far-field test distances for more generic antenna properties. Our system packages offer you a choice of components to fit your custom needs. For a detailed description of each component, please see the individual datasheets.

Components of AMS-8500

ETS-Lindgren has manufactured and installed thousands RF shielded anechoic chambers worldwide. This series of anechoic chambers is designed to have better than –25 dB in Quiet Zone (QZ) reflectivity. This will allow the user to perform antenna measurements in the QZ with less than 0.65 dB measurement uncertainty. Although standard sized anechoic chambers are listed in this package, other chambers of different dimensions can be designed to fit your specific requirements. The AMS-8000 series system packages offer two types of standard shielded anechoic chambers:

Rectangular

Rectangular chambers are available in two sizes, compact (5.5 m length) or full size (7.32 m length). The chambers are constructed with ETS-Lindgren's Series 81 brand of RF shielding, and are lined with ETS-Lindgren's Rantec brand of microwave absorber. The compact size chamber is designed to operate over the frequency range of 800 MHz to 6 GHz, while the full size chamber is designed to operate over the frequency range of 700 MHz to 6 GHz. The frequency range of both chambers can be extended to higher frequencies if desired.

Single and Multi-Axis Positioner

ETS-Lindgren Single and Multi-Axis Positioners (MAPS) are designed with adjustment rails to position the Device Under Test (DUT) near the center of rotation axes (both azimuth and roll axes) for more accurate antenna measurement of a large DUT. To minimize measurement error, the vertical support structures are constructed from low-density dielectric material to provide RF transparency during the measurement. The optional DUT signal lines are RF suppressed and routed through the center of each axis shaft for minimal coupling and interference. The MAPS uses fiber optic control lines between the motor drive and controller. Three models are offered: Model 2005 Light Duty Single-Axis Positioner, Model 2110 Light Duty Multi-Axis Positioner, and Model 2020 Multi Duty Multi-Axis Positioner.

Model 2005 Light Duty Positioner

The single axis Model 2005 is specifically designed for testing wireless handsets only.

Model 2110 Light Duty Positioner

The light duty multi-axis Model 2110 offers independent 360° rotation in both azimuth and elevation. Wireless devices of up to 1 lb (.45 kg) can be accommodated. The positioner is modular, consisting of a rotating turntable base and mounting post.

Model 2020 Heavy Duty Positioner

The heavy duty Model 2020 offers independent 360° rotation in both azimuth and elevation. The positioner is modular, consisting of a rotating turntable base and interchangeable mounting posts. The heavy-duty mounting post is designed for testing wireless devices with a saline filled torso (optional accessory). Maximum load capacity is 35 kg (75 lb). The optional light duty mounting post is designed for testing wireless devices up to 1 lb (.45 kg).

Positioning Controller

The ETS-Lindgren Model 2090 Multi-Device Positioning Controller is capable of operating two MAPS axes simultaneously. The Model 2090 can be operated manually from the front panel, or under software control via the built-in GPIB port (IEEE 488 compatible).

Antenna

ETS-Lindgren's Model 3164-03 Diagonal Dual Polarized Horn antenna is designed for wireless test applications. With a frequency range of 400 MHz to 6 GHz, the antenna covers all currently used wireless service frequencies. Two orthogonal input feeds allow it to be used as a linear or elliptically polarized antenna (with hybrid coupler), as well as making simultaneous measurements in two polarizations at a single angular position. While intended for use as a receive antenna, the Model 3164-03 can also be used as a transmit antenna with proper re-configuration. The antenna has a rated power handling capability of 200 W maximum CW input power.

Instrumentation

The ETS-Lindgren AMS-8000 system packages can be incorporated with a variety of RF instrumentation for your measurement requirements. The system can be configured to perform generic antenna measurement by using a multi-channel vector network analyzer (VNA). A spectrum analyzer or power meter can be used as the receiver instrument for active antenna measurements. For transceiver measurements, a third antenna and a digital package Communication Analyzer can be added to provide transceiver communication link measurements for sensitivity and bit error rate tests. 1

Software

ETS-Lindgren’s AMS-9000 Antenna Measurement Software measurement module is designed for azimuth antenna pattern measurement and/or full spherical antenna pattern measurements for Instruments Under Test (IUTs) in either transmit or receive mode. Post-processing calculations include derivation of antenna half-power beam-width, directivity, gain, radiation efficiency, total radiated power, and total optional isotropic sensitivity. AMS-9000 also provides derivation of CTIA specific near-horizon partial radiated power and near-horizon sensitivity. Advanced graphic capabilities allow acquired data to be displayed in a variety of 2D and 3D formats. Tabular data can be exported to Microsoft Excel™ spreadsheets. Reports can be exported to PDF files, or saved in RTF format for import to Microsoft Word™.

Integration

ETS-Lindgren provides custom field installation of the chamber, positioner, antenna, lab RF cable circuitry, and the WinCal32 antenna measurement software. After installation of the system, a chamber certification test will be conducted at one frequency in Cell Band (836-960 MHz), and one frequency in PCS Band (1820 to 1990 MHz) using the installed positioner following the test procedure defined in CTIA ERP Chamber Certification Procedure. The test should demonstrate that the measured field strength within the quiet zone is less than 1 dB peak-to-peak ripple (or +/-0.5 dB) variation due to any chamber and positioning device imperfections. As another optional feature, ETS-Lindgren will provide the antenna range calibration at any number of test frequencies specified by the customer using the standard antenna method to provide range insertion loss to be incorporate into the software for post-processing. This will allow the user to have a hassle-free turnkey solution for the antenna measurement requirements. ETS-Lindgren’s AMS-9000 Antenna Measurement Software measurement module is designed for azimuth antenna pattern measurement and/or full spherical antenna pattern measurements for Instruments Under Test (IUTs) in either transmit or receive mode. Post-processing calculations include derivation of antenna half-power beam-width, directivity, gain, radiation efficiency, total radiated power, and total optional isotropic sensitivity. AMS-9000 also provides derivation of CTIA specific near-horizon partial radiated power and near-horizon sensitivity. Advanced graphic capabilities allow acquired data to be displayed in a variety of 2D and 3D formats. Tabular data can be exported to Microsoft Excel™ spreadsheets. Reports can be exported to PDF files, or saved in RTF format for import to Microsoft WordTM.

Training

ETS-Lindgren will train the customer’s technical personnel in operation of the positioner device, controller, and the test and measurement software. The training package will also provide a generic theoretical review of antenna measurement principles. Software support and upgrades will be provided for one year after chamber commissioning. Extended software support and upgrade can be provided at an annual fee. ETS-Lindgren is the recognized industry leader for components and systems to measure, contain and control electromagnetic energy. With facilities in North and South America, Europe and Asia, we have worldwide reach and a local presence to support you. Our company is a part of ESCO Technologies Corporation, a NYSE listed company (symbol ESE) with headquarters in St. Louis, Missouri. 2

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Information presented is subject to change as product enhancements are made. Contact ETS-Lindgren Sales Department for current specification.