3-2019

EMV EMV-Verstärker und

EMV EMV-Verstärker und ihr Zubehör Durch aktuelle und zukünftige Funk-Technologien, wie etwa autonomes Fahren, wachsen die Anforderungen an EMV-Mess- und Prüftechnik. In Heft 1 und 2 wurden speziell dafür entwickelte Verstärker, EMC Amplifier, näher vorgestellt. Ein EMC-Amplifier allein nützt jedoch wenig. Für umfangreiche und qualifizierte Messungen benötigt er diverses Zubehör. EMV- Testingenieure oder Hochfrequenztechniker erfahren hier aus renommierter Quelle mehr darüber. Mobile Radiated Immunity Test System An often-overlooked important part of an EMC test setup are the accessories. The cost and time associated with EMC testing warrants the use of high quality accessories. AR offers all the accessories needed to round out your system. Amplifier Accessories This includes a family of antennas that operate up to 50 GHz and handle up to 20 kW. AR’s inhouse antenna designers and experienced EMC design engineers have collaborated over the years to develop antennas that provide very attractive alternatives to traditional antenna designs. Examples include the models Radiant Arrow, ATT Pyramidal Log Period and AA series amplifier antenna products. AR offers these accessories, with an experienced sales and engineering organization available to offer customers the best solution. Figure 1 and Figure 2 are examples of accessories used in radiated and conducted RF immunity test setups, respectively. Manufacturing a wide range of the most common, to the largest and most complex EMC systems in the world sets AR systems apart from the competition. The ability to pull together the right amplifiers for the job, with training and ongoing support is one of the many elements AR prides itself on. This approach allows test engineers and technicians the ability to do what they do best: test. Complete EMC RI and CI systems are available up to 50 GHz. Everything is provided from: amplifiers, antennas, couplers, signal generators, system controllers, receivers, and more, along with the software to control it – all in one comprehensive test system. The above shown example of a mobile RI test system was designed meet HIRF (High Intensity Radiated Fields) levels. This figure shows a shielded rack (doors not shown) containing: amplifiers, RF switch matrix, power measurement equipment, signal generator, antenna mast, antenna assembly, and motor drive to raise and lower the antenna assembly. All components are mounted to a heavy duty mobile cart. Power Amplifiers RF Signal Generators Horn and Log-periodic Antennas Quelle: Application Note #77 Specifying RF/Microwave Power Amplifiers for EMC Testing AR RF/Microwave Instrumentations info@arworld.us www.arworld.us Directional Coupler Isotropic Field Probe And Monitor RF Power Meter EMI Filters Figure 1: Components Used in a Typical Radiated Immunity Test Setup Anechoic Chamber 20 hf-praxis 3/2019

EMV Model Number Frequency Range (GHz) Guaranteed Field Strength (V/m) Spot Size (m) AA18G26-20 18 – 26 20 0.31 x 0.31 AA18G26-50 18 – 26 50 0.14 x 0.17 AA26G40-20 26 – 40 20 0.29 x 0.32 AA26G40-50 26 – 40 50 0.15 x 0,17 Table 1: AA Series Options Power Amplifiers Directional Coupler RF Signal Generators RF Power Meter Figure 2: Components Used in a Typical Conducted Immunity Test Setup Current Injection and Monitoring Clamps Attenuators and Loads and best return on investment. The new CI00402 CI test system (see figure 4) comes with a standard 100 W, 10 kHz to 400 MHz amplifier and full access to the 100A400 amplifier, a spectrum analyzer, and a signal generator. This allows the lab to continue testing in the event other test equipment must is due for calibration, or a failure occurs. Complete Testing Solutions to the following standards: MIL- STD-461 CS114, DO160 (Section 20) BCI Testing, EN/IEC 61000-4-6, IEC 60601-1-2, EN 50130-4, EN 61000-6-1/2, EN 55024. Radiated Immunity Multi-Tone Test System For radiated and conducted immunity testing, the multi-tone approach has many benefits. While the multi-tone methodology, specifically the MT06002 Multi-Tone System (see figure Other examples include; full emissions test capabilities, low, medium, and high power radiated and conducted immunity test systems. These systems are fully automated with AR’s emcware. High-Frequency Field Generating Systems Traditionally, generating lowlevel electric fields in the 18...40 GHz band has been performed TWTAs. These TWTAs often produce much more power than is required to generate the required field strengths while also being an extremely costly solution. Why pay for unnecessary power? AR has the answer with the introduction of its AA- Series field generating systems, see Figure 3. These systems produce field strengths of up to 50 V/m in the 18...26.5, and 26.5...40 GHz bands. The AR models AA18G26 and AA26G40 each consist of an antenna directly mounted to a solid-state amplifier, along with sufficient heat sink and overtemperature fault detection. By connecting the antenna directly to the amplifier, we have eliminated cable losses and can deliver maximum amplifier power to the antenna. The RF loss associated with the cable can be significant, requiring a higher power amplifier to generate the same RF field as the amplifier/antenna unit. Within each frequency band, there are two available options. The model suffixes -20 and -50 associated with each model indicates the guaranteed minimum field strength (20 V/m or 50 V/m). To minimize amplifier size, the AA-Series uses antenna gain, rather than amplifier gain to achieve higher field strengths. Table 1 gives a listing of all the available AA field generating units with their associated frequency ranges, field strengths and antenna spot sizes. Conducted Immunity Test System Constantly improving the AR product offering provides customers with the latest technologies Wir haben Lösungen für Ihre Störstrahlungsprobleme Das Eukatec-Beschichtungsverfahren sorgt für hohe Durchstrahldämpfung, geringen Oberflächenwiderstand, hohe ESD- Ableitung und garantiert hervorragende Recyclingfähigkeit. Wir sind Ihr Ansprechpartner für die EMVbzw. ESD-Abschirmung Ihrer Produkte sowie für eine Metallisierung von Kunststoffen mit Kupfer, Aluminium oder Zink. Auf Wunsch auch Beratung, Planung und Lieferung von kompletten Beschichtungsanlagen. Von der Idee bis zum fertigen Produkt sind wir Ihr Partner! EUKATEC Europe Ltd. Alsweder Landstraße 10 D-32339 Espelkamp Tel.: +49 (0) 5743 - 93 193 0 Fax: +49 (0) 5743 - 93 193 09 info@eukatec.com www.eukatec.com hf-praxis 3/2019 21 Eukatec 3-2018.indd 1 24.01.2018 14:43:41