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Test and Measurement

Performing Transient Analysis on PLL Frequency Synthesizers

Use of system-level simulation tool with flexible behavorial modeling capability to simulate and enhance the performance of a wireless PLL circuit
Technical Feature Performing Transient Analysis on PLL Frequency Synthesizers A PLL can be considered a subsystem within a larger communications system, so it is appropriate to analyze this type of network with the help of a system-level simulator. The use of flexible behavioral models within the simulator allows only...
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A Hardware Multichannel Simulator for Wideband Wireless Systems

Introduction to a wideband multichannel simulator with eight fading channels, 70 MHz RF bandwidth and spatial channel modeling
Product Feature A Hardware Multichannel Simulator for Wideband Wireless Systems Elektrobit Kauniainen, Finland Hardware-based multipath fading simulators have traditionally been used to generate up to two simultaneous fading channels. Mobile network testing and future wireless applications like geolocation, smart antennas and multiple input multiple output (MIMO) systems, however, require...
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Application and Operation of a Double OCXO

Use of double oven-controlled crystal oscillators to improve thermal quality for highly precise frequency references
Application Note Application and Operation of a Double OCXO Timo Reinhardt FOQ Piezo Technik GmbH Bad Rappenau, Germany Central switching centers make up the junction of mobile and stationary communications. In order to handle increasing data flows, this operation is performed at ever-higher frequencies and data speeds, and the...
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An Impendance-Controlled, High Precision Wafer Probe Tip for Applications Up to 40 GHz

Development and manufacture of a high precision wafer probe tip for on-wafer measurements
Product Feature An Impedance- Controlled, High Precision Wafer Probe Tip for Applications Up to 40 GHz Suss/Rosenberger, Germany Dresden, Germany Fig. 1 The probe's contact spring assembly and transition to the coaxial air line. High precision is a vital prerequisite for the development and manufacture of high frequency cables...
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Vector Network Analyzers For Measurement to 50 GHz

A new suite of high performance vector network analyzers is featured
Cover Feature Vector Network Analyzers For Measurements to 50 GHz Agilent Technologies Inc. Santa Rosa, CA The HP 8510 vector network analyzer introduced by Hewlett-Packard in 1985 revolutionized microwave measurements by combining advanced techniques for characterizing components with the computational power afforded by the microprocessor. For the first time,...
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Orthogonal Frequency Division Multiplex Overview

Explanation of the improvement gained by applying space diversity techniques to the orthogonal frequency division multiplex system in a multipath fading environment
Technical Feature Orthogonal Frequency Division Multiplex Overview Ali Zamanian Fluor Corp. Wireless broadband, also called wireless cable, was developed to provide local access to small business and residential users for the delivery of high quality digital data, video and voice services. Orthogonal frequency division multiplex (OFDM) is a modulation...
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Fractional-N Synthesizers

Description of fractional-N synthesizers and the associated systems used to implement the technology in commercially available products
Technical Feature Fractional-N Synthesizers David Owen IFR Systems Inc. Wichita, KS Fig. 1 A basic fractional-N system with no jitter correction based on a single accumulator. Fractional-N synthesizers have been used for many years to improve the performance of indirect frequency synthesizers. A simple indirect synthesizer consists of a...
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Design of a Low Phase Noise Ku-band Oscillator Using a SiGe HBT

Presentation of the characteristics of a commercially available SiGe heterojunction bipolar transistor used in an oscillator operating at Ku-band
Technical Feature Design of a Low Phase Noise Ku-band Oscillator Using a SiGe HBT Myrianne Regis, Hugues Lafontaine and Steve Kovacic SiGe Semiconductor Ottawa, ON, Canada Gilles Cibiel and Olivier Llopis LAAS-CNRS Toulouse, France In the past decade, the demand for microwave, millimeter-wave and wireless communication systems has rapidly...
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220 to 325 GHz Vector Network Anaylsis

Introduction to a new pair of vector network analyzer frequency extension modules covering 220 to 325 GHz
Product Feature 220 to 325 GHz Vector Network Analysis Oleson Microwave Labs (OML) Morgan Hill, CA A new pair of vector network analyzer (VNA) frequency extension modules, covering 220 to 325 GHz, is being introduced along with a precision waveguide calibration kit. The models V03VNA-T/R and V03VNA-T are compatible...
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Low Cost Plastic MMIC VCOs

A new line of multifunction monolithic microwave integrated circuit VCOs is this month's cover feature
Cover Feature Low Cost Plastic MMIC VCOs Hittite Microwave Corp. Chelmsford, MA Fig. 1 Ku-band VCO on an evaluation PCB. A breakthrough in monolithic microwave integrated circuit (MMIC) design and manufacturing technology has occurred with the introduction of a new multifunction VCO product line. The new VCO's phase noise...
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