TWT Amplifiers Meets Demands HIRF EMC Testing in Commercial AircraftA series of new high-power, pulsed TWT (traveling wave tube) instrumentation microwave amplifiers has been introduced by UK-based TMD Technologies, Ltd. These amplifiers have been optimized to meet the latest stringent demands of high intensity RF (HIRF) EMC testing. The PTC6000 and the PTC7000 TWTAs between them cover the frequency range of 1 to 18 GHz with minimum power outputs of 3.5 kW pulsed—up to a maximum of 14 kW pulsed in some parts of the band. This performance satisfies the aerospace EMC testing requirements for commercial aircraft such as the Airbus 380 and Boeing 787. Because of the increasing use of carbon fiber in their structures, newer aircraft are more susceptible to microwave radiation than the older models of all-metal design. The PTC6000 and PTC7000 are lightweight and feature a basically modular construction that allows for easier troubleshooting. The amplifiers operate from 110 to 250 VAC, 50 to 400 Hz—satisfying the various global conditions for prime power. Learn more at the TMD Technologies’ website.Spatially Combined Power Amplifier Provides an Alternative to TWTAsThe CHPA0618-1-G45 from CAP Wireless is an ultra-broadband power amplifier that combines gallium arsenide (GaAs) monolithic microwave integrated circuit (MMIC) technology and the company’s proprietary, patented Spatium™ broadband spatial combining technology. It achieves solid state power levels across an extended 6- to 18-GHz frequency range and provides a reliable alternative to traveling wave tube amplifiers for demanding applications including EMC testing, electronic counter measures, and satellite communications. Key product features include ultra-broadband 5.58- to 18.4-GHz bandwidth, 40 W typical saturated power, gradual degradation (soft-fail) in the event of device failure, flat gain without equalization, and infinite load VSWR without damage. Look for more product details at the CAP Wireless website. Amplifier Includes Input Overdrive and Thermal Shutdown ProtectionModel NP-2500 from NP Technologies is a Class A, 20-W CW (continuous wave), rack-mountable amplifier system designed to operate over the range of 20 MHz to 500 MHz with a gain of 44 dB and a P-1 of 25 W typical. The 3.5″ high NP-500 operates from 95 to 225 VAC 47/63 Hz and has RF input drives levels up +3 dbm. The NP-2500 will handle an infinite load VSWR up to 20 W and includes input overdrive and thermal shutdown protection. This device is a self-contained unit consisting of the RF amplifier, AC-to-DC power supply, back panel shutdown, a BNC connector, and cooling fans. Find more product information on the NP Technologies’ website. Broadband CW Amplifier Targets EMC and Radar Testing ApplicationsThe MT4100 from MCL is a broadband, CW amplifier for use in EMC, radar, and EW (electronic warfare) testing. With typical output power ranging from 35 W up to 550 W, the MT4100 is available in models covering the 2- to 8-GHz, 6- to 18-GHz, 18- to 17-GHz, and 26.6- to 40-GHz frequency bands. Utilizing a modular design, this TWTA (traveling wave tube amplifier) features an extended diagnostic capability, advanced thermal design, and ducted cooling. This TWTA also offers a complete set of serial commands in Ethernet, RS232, or RS232 for quick and easy hook-up to an automation system. More product information can be found on the MCL website. DC-Coupled AC Amplifier Offers Low Noise and Fast Slew RatesModel 7548 from AE Techron can safely drive a wide range of resistive, inductive loads. It is well suited to EMC testing in applications that require both continuous AC or DC signals and significant short term (burst) signals (DO160 or MIL-STD-461. A single 7548 has an output capability of 100 amperes peak. If more power is needed, up to four amplifiers can be combined in series or parallel and will operate as a single system. This amplifier operates in either voltage or current mode and features DC-coupling, robust output devices, and a power range of 3300 W RMS. Other key product features include over 12,000 W peak for 40 milliseconds into a 1.5-ohm load, 40 mSec pulses of up to 72 A peak into a 1-ohm load, and frequency bandwidth of DC to 50 Hz at rated power or DC to 100 kHz at reduced power.Learn more about the 7548 at the AE Techron website.
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