RF & Wireless Components GORE PolyVent XL Improves Reliability of Large Outdoor Electronic Enclosures W. L. Gore & Associates has expanded its line of screw-in GORE Protective Vents with a new vent specifically engineered for large outdoor enclosures with a volume in excess of 200 liters. The GORE PolyVent XL improves the integrity, reliability and safety of these large housings in challenging environments such as found in the solar, telecommunications and exterior lighting industries. Integrating the GORE PolyVent XL into an outdoor enclosure results in improved reliability, increased safety and longer product life. This new vent is the latest addition to Gore’s full line of plastic and metal screwin vents available in various sizes and thread types. Changes in environmental temperatures cause the air inside of largevolume housings to expand and contract frequently, which can DC to 6 GHz Switches Operate Up to 200 W KCB Solutions, an ITAR compliant and AS9100 certified microwave design and manufacturing center, is pleased to announce a new suite of SPST through SP6T switches designed to meet high power-handling requirements from 50 to 200 Watts. These switches are available in QFN-style packages and thermally conductive flange-mount packages. As an added feature, they are shipped to order in your choice of a variety of factory-configured ports. Designed and manufactured with PIN diode technology, they are 100 percent RF tested (small signal), have robust carrier construction, and are manufactured with thick deposition thin film traces. lead to failure of the housing seals and compromised internal electronics. Integrating the GORE PolyVent XL into the housing provides such a high airflow that internal pressure remains equalized, enabling the manufacturer to simplify its design and protect electronics without having to add stronger seals or additional bolts. The use of this unique vent results in substantial cost savings for the manufacturer. Sudden changes in environmental conditions can cause pressure to build up inside the housing, sometimes even exceeding 200 mbar (3 psi). This level of internal pressure can put significant stress on seals and housing materials, which can cause them to fail, resulting in reliability and For power levels up to 50 Watts, KCB offers these high power switches in surface mount packages. They offer low-loss performance from DC to 6 GHz and robust construction. They¹re ideal for today¹s demanding portable military communications. To address the need for switches that can handle powers in excess of 50 Watts, KCB has developed a flanged-based package. By utilizing an AIN carrier with a CuW sub-mount, the construction of these products offers superior heat spreading which allows for CW incident power levels up to 200 Watts. This, coupled with larger minimum breakdown voltages, provides the designer with a switch that is ideally suited for higher powered radios, radar and counter IED systems. These models are available in configurations up to SP3T. KCB offers several off-the-shelf configurations as well as dozens of possible configurations that can be quickly realized using off-the-shelf components. In addition, the designer can choose from a menu of diodes that provide optimal linearity for the application. ■ KCB Solutions www.kcbsolutions.com safety issues. Constructed of a unique breathable membrane, the GORE PolyVent XL equalizes the internal pressure by allowing air to flow freely into and out of the housing at a rate of 16 liters per minute at 12 mbar. At the same time, the GORE PolyVent XL prevents liquid ingress at a pressure of 0.3 bar for 60 seconds (equivalent to water immersion at three meters). The GORE PolyVent XL delivers reliable, long-lasting protection even in the harshest environments as proven by its compliance with multiple industry standards. The vent’s membrane protects the electronics from liquids and particulates by providing a durable barrier that even meets the challenging IP69K standard, which addresses protection from high-pressure, high temperature spray. Performing reliably in temperatures between –40 °C and 125 °C, Gore’s vent protects against harsh weather conditions as indicated by its passing performance standards such as the UL 746C ultraviolet test. The vent also increases housing life because of its durable welded cap, enabling the vent to pass the hail impact test specified in the IEC 62108 standard for the solar industry. After installation in the field, the GORE PolyVent XL does not require any maintenance for the life of the electronics and the housing. With offices and testing facilities located throughout the world, Gore application engineers are available to work closely with manufacturer’s design teams from initial product concept through rigorous testing and integration into the manufacturing process. ■ W. L. Gore & Associates, Inc. www.gore.com 40 hf-praxis 9/2013
RF & Rubriken Wireless Components Long-Range RFIC Platform Will Drive Internet of Things (IOT) and Machine-to-Machine (M2M) Deployments Semtech Corporation introduced the SX1272, the first product in a new long-range RFIC platform that boosts the transmission range of the devices to up to 15 kilometers (km). This device integrates Semtech’s new LoRa (long range) modulation technology to enable drastic range improvements over alternative modulation methods. The maximum distance today of a smart meter transceiver in Europe utilizing FSK modulation is between one and two kilometers. The SX1272, utilizing LoRa operating under the same conditions and regulatory limits, can transmit more than 15 km. The SX1272 is designed for industrial control, agriculture/ irrigation, smart metering and sensor network applications. The additional range provided by LoRa will eliminate the need for repeaters in these applications, significantly simplifying the system design and lowering the total cost of deployment. The range extension provided by LoRa also makes the device ideal for emerging smart city, Internet of things (IOT) and machine-tomachine (M2M) applications. The SX1272 achieves receiver sensitivity up to -137 dBm utilizing a low-cost crystal. This compares to today’s state-of-theart FSK devices that can achieve sensitivity of -115 dBm with a comparable crystal or -125 using an expensive temperature controlled crystal oscillator (TCXO). Additionally, the SX1272 has a 25 dB improvement over FSK devices for rejecting in-band interfering signals. This makes the device especially effective in industrial, scientific and medical (ISM)-band applications such as security and metering because it provides immunity from sub- GHz frequency 4G/LTE signals. This immunity, combined with the SX1272’s highly linear RF front-end, makes it the most reliable and robust solution for operating in the presence of strong interfering signals. The fast growth of the IOT/M2M market – predicted by industry analysts to total 50 billion nodes by 2020 – provides another great opportunity for the SX1272 with LoRa technology. There is a dramatic need for an improved physical layer in this market for long range, low power for battery operation, and low cost for volume deployment. LoRa is the ideal solution to meet these needs and a great complement to 2G/3G GSM in this rapidly growing market. The SX1272 supports GFSK, FSK, GMSK, and OOK modulation in addition to LoRa and is designed to support WMBus, IEEE 802.15.4g (SUN), FCC 15.247, ARIB T96/108, EN 300- 220 as well as other worldwide standards and regulations. Key Features of the SX1272 • +20 dBm maximum output power • -137 dBm sensitivity • Low current consumption 9.7 or 10.8 mA RX current 100 nA sleep current 28 mA TX current at +13 dBm Richardson RFPD, Inc. announces the availability of the new Silicon Carbide (SiC) six-pack (three phase) power module from Cree, Inc. (Cree). The CCS050M12CM2 is the industry‘s first commercially available SiC six-pack power module in an industry-standard 45 mm package. The new six-pack SiC 1.2 kV, 50 A module enables high performance, reliable, low cost power conversion systems, offering significant reductions in power losses and corresponding heat sink size requirements, as well as significantly increased power density, when compared to a silicon module with equivalent ratings. The CCS050M12CM2 is ideally suited for solar inverter, uninterruptible power supply • Bit rates up to 300 kbps • -12.5 dBm IIP3 • 72 dB adjacent channel selectivity • 66 dB image attenuation • 1.8 to 3.7 V supply range • Ultra-fast frequency hopping • WMBus, 802.15.4g(SUN), ARIB T96/108, and LoRa compatible • ETSI, FCC, and ARIB compliant The SX1272 (order code: SX1272IMLTRT) is available immediately in production quantities. Data sheets, volume pricing, and delivery quotes, as well as evaluation kits and samples, are available at www.semtech. com/info. ■ Semtech Corporation www.semtech.com New Silicon Carbide Six-Pack Power Module from Cree – available in industry-standard 45 mm package (UPS), switched-mode power supply (SMPS), induction heating, regenerative (ReGen) drive, 3-phase power factor correction (PFC), and motor drive applications. Additional key features of the include: • Ultra low loss • Zero reverse recovery current • Zero turn-off tail current • High-frequency operation • Positive temperature coefficient on VF and VDS(on) • Cu base plate, AIN DBC The device is in stock and available for immediate delivery. ■ Richardson RFPD www.richardsonrfpd.com hf-praxis 9/2013 41
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