Compact Test Range (CTR)
Com­pact Test Range (CTR)
Image 1/4, Credit: DLR (CC BY-NC-ND 3.0)

Compact Test Range (CTR)

Char­ac­ter­i­sa­tion of a short­ened horn an­ten­na for radar satel­lite cal­i­bra­tion in the L-band.
Telemetry/Telecommand
Teleme­trie/Telecom­mand
Image 2/4, Credit: DLR (CC BY-NC-ND 3.0)

Telemetrie/Telecommand

Teleme­try/telecom­mand per­for­mance test on a satel­lite mod­el.
1.2-metre K-band reflector
1.2-me­tre K-band re­flec­tor
Image 3/4, Credit: DLR (CC BY-NC-ND 3.0)

1.2-metre K-band reflector

Test­ing a high-gain K-band re­flec­tor an­ten­na.
DLR Oberpfaffenhofen TechLab
DLR Oberp­faf­fen­hofen Tech­Lab
Image 4/4, Credit: DLR (CC BY-NC-ND 3.0)

DLR Oberpfaffenhofen TechLab

Ex­te­ri­or view of the DLR Oberp­faf­fen­hofen Tech­Lab.

The Compact Test Range (CTR) is based at the German Aerospace Center (DLR) Microwaves and Radar Institute in Oberpfaffenhofen; it is an indoor measuring system for the high-precision determination of antenna features over a frequency range of 0.2–100 gigahertz. Due to the facility’s very large measuring zone (approximately 3.4 metres in diameter) and its six-axis rotary stand with a load capacity of 300 kilograms, it is possible to measure antennas together with their support structures and aerodynamic attachments. This allows the effect of antenna characteristics on its electromagnetic environment to be detected in real-time.

A special measuring chamber for examining antennas

DLR’s CTR comprises of a shielded measuring chamber clad with microwave absorbers, where two specially shaped metal mirrors produce a plane wavefront over short distances (the compact antenna test range). Due to climate control, the measurements are conducted under stabilised environmental conditions. The system is notable for its very high amplitude, phase and angular accuracy. It serves primarily to measure and verify the electromagnetic properties of newly developed antennas and structures. The range of applications offered by the measuring chamber also includes determining the radar backscatter cross-section of active and passive radar calibration targets.

Antennas are being developed in the radar remote sensing and radiometry departments of the Microwaves and Radar Institute. Other DLR facilities use antennas to conduct measurements for the purposes of communication, navigation, telemetry/telecommand and data transmission. The capability of the large-scale facility to be used in the measurement of antenna prototypes on behalf of external customers illustrates the wide-range of services it provides.

Contact
  • Volker Speelmann
    Head of Re­search In­fras­truc­tures
    Ger­man Aerospace Cen­ter (DLR)
    Telephone: +49 2203 601-4103
    Fax: +49 2203 601 4115
    Linder Höhe
    51147 Cologne
    Contact
  • Markus Limbach
    Ger­man Aerospace Cen­ter (DLR)
    Mi­crowaves and Radar In­sti­tute
    SAR Tech­nol­o­gy
    Telephone: +49 8153 28-3060
    Fax: +49 8153 28-1135
    Münchener Straße 20
    82234 Oberpfaffenhofen-Weßling
    Contact
  • Bernd Gabler
    Ger­man Aerospace Cen­ter (DLR)
    Mi­crowaves and Radar In­sti­tute
    SAR Tech­nol­o­gy
    Telephone: +49 8153 28-1182
    Fax: +49 8153 28-1135
    Münchener Straße 20
    82234 Oberpfaffenhofen-Weßling
    Contact

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