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Industry News

A Fast Switching, Low Noise, Indirect Synthesizer

The FastSource frequency synthesizer, which covers the 4.5 MHz to 6 GHz frequency range with a switching speed of less than 100 µs, is featured on this month's cover
March 1, 1999
A Fast Switching, Low Noise, Indirect Synthesizer Aeroflex Comstron Plainview, NY The dilemma faced by automatic test equipment suppliers in the test of multifunction ICs for the wireless industry is that they require the spectral purity of indirect synthesizers for LO and stimulus signals. At the same time, switching...
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Single-carrier Power Amplifiers for GSM Applications

High power amplifiers that employ laterally diffused metal oxide semiconductor devices and meet or exceed the stringent GSM 05.05 requirements
March 1, 1999
Single-carrier Power Amplifiers for GSM Applications AML Communications Inc. Camarillo, CA As the sophistication of GSM has evolved, the demands for ever-increasing data rates have imposed new design challenges for high power, single-channel amplifiers. In order for a power amplifier to meet the stringent requirements of the GSM 05.05...
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A Radio Channel Simulator fro W-CDMA Applications

The PROPSim+ radio channel simulator, which features a 35 MHz RF bandwidth and 312 paths that enable more realistic channel simulation
March 1, 1999
Product Feature A Radio Channel Simulator for W-CDMA Applications Elektrobit Ltd. Please click here to view the pdf file of the Product Feature...
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Radiated Emissions Measurements Using an EMI Receiver

Radiated emissions measurements and guidelines to optimize measurement performance using an electromagnetic interference (EMI) receiver
March 1, 1999
Radiated Emissions Measurements Using an EMI Receiver Andrew Ware Hewlett-Packard Co.,Santa Rosa Systems Division Santa Rosa, CA Electronic products designed for global markets must meet both national and international standards for electromagnetic compatibility (EMC). Measurements based on these standards fall into two basic categories of electromagnetic (EM) testing: radiated...
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Vector-corrected Power Sensor Calibration

A new power sensor calibration system incorporating a vector network analyzer that significantly reduces overall calibration uncertainty
March 1, 1999
Technical Note Vector-corrected Power Sensor Calibration J. Randy Fenton Please click here to view the pdf file of the Technical Note...
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Noise Figure Measurement: Corrections Related to Match and Gain

The effects of gain and match on noise figure measurement accuracy and how an integrated measurement of raw noise figure and vector S parameters can improve some of these issues
March 1, 1999
Technical Feature Noise Figure Measurement: Corrections Related to Match and Gain Dave Vondran Please click here to view to pdf file of the Technical Feature...
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Network Analyzer Calibration for Measurements Near the Waveguide Cutoff Frequency

Confirmation of the TRL calibration technique as the preferred method since the accuracy of its corrected scattering coefficient results remain consistently good over the 6.6 to 12.4 GHz bandwidth for WR90 waveguide
March 1, 1999
Technical Feature Network Analyzer Calibration for Measurements Near the Waveguide Cutoff Frequency S.P. Yeo and M. Cheng Please click here to view the pdf file of the Technical Feature...
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A Sub 1 W Load-pull Quarter-wave Prematching Network Based on a Two-tier TRL Calibration

A vector network analyzer error-correction characterization technique based on a two-tier calibration using 7 mm and microstrip thru-reflect-line (TRL) calibrations
March 1, 1999
A Sub 1 W Load-pull Quarter-wave Prematching Network Based on a Two-tier TRL Calibration Transistors used for cellular and PCS infrastructure applications are required to amplify signals with a peak-to-average ratio that can exceed 13 dB, resulting in a peak envelope power (PEP) approaching 1 kW. This PEP requirement...
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Miniaturized Low Cost 30 GHz Monolithic Balanced BPSK and Vector Modulators: Part 1

The advantages of using direct carrier modulation at mm-wave frequencies as well as the active device characterization and detailed circuit analysis of both single-stage and balanced modulators
March 1, 1999
Technical Feature Miniaturized Low Cost 30 GHz Monolithic Balanced BPSK and Vector Modulators: Part 1 A.E. Ashtiani, T. Gokdemir, G. Passiopoulos, A.A. Rezazadeh, S. Nam and I.D. Robertson Please click here to view the pdf file of the Technical Feature...
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Measurement of a Small Signal Near a Large Signal Using a Spectrum Analyzer

Factors to be considered to determine the measurement limitations of a small signal in the presence of a large signal
March 1, 1999
Measurement of a Small Signal Near a Large Signal Using a Spectrum Analyzer   Morris Engelson JMS Consulting Portland, OR A number of factors are involved in determining whether a small signal can be measured in the presence of a larger signal using a spectrum analyzer. The type of...
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