Products
Staff -- Test & Measurement World, 11/1/2003
Antenna ideal for high fields, large DUTs
The Radiant Arrow AT2526 log-periodic antenna covers the 26-to 250-MHz frequency band and accepts up to 15 kW input, making it suited for high field generation and large EUT testing. It also works well in traditional applications and is tough enough for outdoor use. Measuring 110x21.1x79.7-in., the AT2526 uses a bent-element design that reduces overall size by 60% without sacrificing gain and beam width. The size reduction minimizes field loss that is the result of room loading. Amplifier Research, Souderton PA. 215-723-8181; www.amplifiers.com .
Gasket shields EMI from circuits
W.L. Gore has developed the SnapShot EMI shield, a custom part that the company will make to fit over any circuit or circuit component. The SnapShot uses a metalized plastic mold with holes that let you snap the shield into place over your components. To use the shield, design the PCB with a BGA pattern that aligns with the shield's mounting holes. If a component requires servicing, you simply remove the shield by peeling it off the PCB. W.L Gore, Elkton, MD. 800-445-4673; www.gore.com/electronics .
Amp generates 500 W from 0.8—2.5 GHz
The Model 5156 is the only 500-W solid-state power amplifier with a frequency band of 0.8—2.5 GHz. Designed for TWTA replacement in military and automotive EMC RF immunity testing, the unit uses Class A/AB linear power devices that provide a high and wide dynamic range. It exhibits superior linearity, gain flatness, and noise figure compared to a TWTA amplifier. This solid-state amplifier provides linear power output at 1dB power of 400 W, small signal gain of +58 dBm, gain flatness of ±2 dB and a low noise figure of +15 dB. Ophir RF, Los Angeles, CA. 310-306-5556; www.ophirrf.com .
Catalog lists board-level shields and contacts
Laird's new catalog offers a wide variety of custom and standard one-piece, two piece, and multi-compartmental shields, frame and cover styles, drawn BLS, EZ Peel styles, and surface-mount contacts. The company also makes a wide range of EMI shielding materials, including engineered board-level shields, fingerstock, conductive elastomers in extruded profiles, molded shapes and form-in-place gaskets, and fabric-over-foam and a full range of shielded windows. Laird Technologies, Delaware Water Gap, PA. 570-424-8510; www.lairdtech.com .
EMC precompliance test system
The EMC 461 measurement system makes precompliance measurements with a handheld spectrum analyzer. The system includes the Model 401B analyzer, PC software, preamplifier with 26-dB gain, and a 6-ft cable. The 401B contains antenna-factors for EMC antennas from A.H. Systems, Electro-metrics, ETS-Lindgren, and Sunol Sciences. You can also enter your own antenna factors. PC software provides instrument control and test limits for MIL-STD-461E, CISPR 11, CISPR 22, and FCC Part 15 with a measurement range from 1 MHz to 1024 MHz. Price: $3900. Bantam Instruments, Sunnyvale, CA. 408-736-3030; www.bantaminstruments.com .
Antenna illuminates your EUT
ETS-Lindgren's Model 3117, a double-ridged waveguide antenna, uniformly illuminates your EUT for radiated-emissions and radiated-immunity testing. A uniform field lobe across the antenna's 1-GHz-to-18-GHz frequency range has no band gaps. The uniform field lobe ensures that the antenna illuminates an EUT's surfaces with equal power for a given distance from the antenna. For immunity testing, sweep a signal generator across the antenna's frequency range without changing signal amplitude. ETS-Lindgren calibrates each antenna in an A2LA-accredited calibration lab. Price: $3360. ETS-Lindgren, Cedar Park, TX. 512-531-6400; www.ets-lindgren.com .
