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Industry News

Useful Filtering Techniques to Save Scarce Spectrum in Communications Systems

Filtering techniques that significantly reduce transmitted banwidth without losing the content of digital data
Useful Filtering Techniques to Save Scarce Spectrum in Communications Systems Helen Wright Hewlett-Packard Co., Microwave Instruments Division Santa Rosa, CA Most communications systems fall into one of three categories: those that are bandwidth efficient, power efficient or cost efficient. Bandwidth efficiency describes the ability of a modulation scheme to...
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Around the Circuit

Around the Circuit INDUSTRY NEWS Plainview, NY-based Aeroflex Inc. has acquired 90 percent of the common stock of France-based Europtest S.A. for approximately $1.1 M. Aeroflex will purchase the remaining 10 percent of the company over a three-year period at prices to be determined based upon net sales of...
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Components

COMPONENTS GaAs MMIC SPST Switches The model AS123-12 GaAs MMIC SPST switch features high isolation of 45 dB at 0.9 GHz and 52 dB at 1.9 GHz as well as low insertion loss. The unit offers single positive control voltage and +5 V operation. When used with the company's...
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Antennas

ANTENNAS Cellular/GSM/ISM Dual Linear Antennas These cellular/GSM/ISM dual linear antennas feature a low profile design for minimum visual impact, making them suitable for discreet antenna installations. The units provide for simultaneous reception and transmission of both vertically and horizontally linearly polarized signals in the 824 to 896 GHz, 880...
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Amplifiers

AMPLIFIERS Solid-state Microwave Amplifier The model 100S1G4 solid-state microwave amplifier provides 100 W minimum power in the 0.8 to 4.2 GHz range, which is used often in PCS, broadcast communications and other handheld wireless test applications. Local and remote control of the unit is available through its digital control...
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Test Equipment

TEST EQUIPMENT 10 MHz General-purpose Lab Pulse Generator The model AV-1030-C 200 ps rise time, 10 MHz user-friendly generator provides 0 to +/-5 V out (0.5, 1.5 and 5 V ranges) with pulse width variable from 5 ns to 1 ms and fall times of less than 300 ps....
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Devices

DEVICES Small Silicon Bipolar Transistors The M03 series three-pin, flat lead packages are designed for the NPN series silicon transistors. The package has an overall footprint of 1.4 x 1.4 mm, which represents a size reduction of over 40 percent. Several low noise NPN silicon transistors with fTs of...
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Sources

SOURCES 5 V VCO The model JTOS-3000P 2300 to 2600 MHz wideband VCO features linear tuning characteristics, low -112 dBc/Hz phase noise at 100 kHz offset and tuning voltage of 5 V (max). Power output is +11 dBm (typ) and harmonics are -22 dBc (typ). Operating at nominal power...
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Software

SOFTWARE Wireless System Simulation Software The Symphony series wireless system simulation software combines schematic capture and high frequency system analysis in a single, easy-to-use graphical interface. The software adds powerful analog and digital signal processing (DSP) system analysis capabilities for the design of wired and wireless communications systems to...
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Materials

MATERIALS RF Protective Clothing This RF protective clothing provides improved personnel protection within RF and electro-magnetic fields, allowing employees to work safely in ambient RF fields significantly above IEEE C.95.1-1992 MPE levels. The RF protective suit's fabric incorporates a yarn that consists of stainless-steel microfibers in a cotton/polyester base....
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