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White Papers

Wavelex Products Facilitate Both Multi-octave Bench Testing and Multi-system Testing

May 19, 2014
This paper addresses the use of Wavelex wideband products in test setups for multi-octave and multi-system testing, as well as the advantages of using these wideband products for the testing of narrowband systems. Specific products are presented, along with an example test setup that allows for multi-system testing of ISM 868 MHz, ISM 915 MHz, and avionics transponders at 978 MHz, 1030 MHz, and 1090 MHz, without the need to change components.

AR's Complete Product Catalog for EMC & RF Testing

May 19, 2014

AR has just completed a brand new edition of our sought after full line product catalog. We have expanded our facility to provide unparalleled high power capabilities to test RF amplifiers in excess of 10,000 watts and added various new RF and microwave power amplifiers to our extensive product lines. The catalog continues to be easy to use, with "find-it-fast" charts and color coding to help get right to whatever you need for RF & EMC testing.

Eliminating the Tradeoffs and Limitations of Your Pulse Measurement Test Solution

May 19, 2014
Next generation radar systems face multiple difficult demands. The pace and variety of new requirements need multi-use/function/mode adaptive radars, to be used for different applications. This whitepaper reviews existing pulse measurement test methods; discusses advantages/limitations; and introduces new test method that takes advantage of high-speed digitizing architecture, offering the industryâ??s highest resolution/timing accuracy level.

Expanding Bandwidth with Ferrite Loaded Transmission-Line Devices

April 15, 2014
Many passive multiport devices - such as power dividers/combiners, baluns, hybrids, and impedance transformers - rely on electromagnetic (EM) coupling for their intended functions. In the microwave range this is typically achieved through a usage of capacitive (electrical) coupling between the closely spaced transmission lines. Adding the magnetic coupling by utilizing the ferrite-loaded transmission lines allows significantly expanding the operation band both up and down in frequencies. This paper provides the theoretical explanation for such a broad frequency effect of ferrite materials and illustrates the theory by presenting the 3-D simulation results for 2:1 impedance ratio ferrite transmission-line transformer.

Measuring RF Power Sensor Nonlinearity

April 15, 2014
To amplify weak signals received by the antenna in communication systems, low noise amplifiers (LNAs) are deployed. LNAs are used in various applications such as GPS receivers, wireless data systems, satellite communications, cellular handsets, radio systems, etc..

Modeling a Printed VHF Balun Leveraging EM Simulation

April 15, 2014
The use of printed microstrip couplers in power amplifiers operating at microwave frequencies above 1 GHz has been well established and numerous papers have been written about the design of such structures. It is surprising, however, that little has been written about the subject of printed baluns (BALanced to UNbalanced) - electrical devices that convert between a balanced signal and an unbalanced signal. Even more surprising is that the dominant approach to power combining at VHF and UHF is via coaxial cables, which comes with inherent assembly, cost, and thermal issues.

GaN Thermal Analysis for High-Performance Systems

March 17, 2014
This paper addresses TriQuint's integrated approach to thermal design that leverages modeling, empirical measurements (including micro-Raman thermography), and finite element analysis (FEA) for high performance microwave GaN HEMT devices and MMICs. This methodology is highly effective and has been empirically validated. By properly addressing FEA boundary condition assumptions and the limitations of infrared microscopy, resulting model calculations are more accurate at both the product and end application level than traditional methods based on lower power density technology.

Wireless Telecommunications Testing with "S" Series Microwave Power Amplifiers

March 17, 2014
AR RF/Microwave Instrumentation offers a broad range of power amplifiers covering DC to 45 GHz with output power ranging from 1 to 16,000 watts. While applications include Electromagnetic Compatibility testing (EMC), RF component testing, physics (plasma generation) and chemistry (mass spectroscopy) applications, military (jammers, radar), material testing (ultrasound), medical diagnostic testing (NMR, MRI) and general lab use, this applications note focuses on a line of amplifiers that has been optimized for wireless telecommunications test use.

Long-Term, Remote Monitoring of Satellite Performance Using an Agilent High-Frequency USB Power Sensor

March 17, 2014
This application note describes typical satellite applications that require power measurements and recommends power measurement solutions. It also explains how these solutions can help simplify your work, and improve accuracy, reliability and test coverage. Also covered are new sensor functions such as built-in Gamma and S-parameter corrections and real time measurement uncertainty calculations for improved accuracy.

Achieving Excellent Vector Signal Analysis Results Using Innovative Noise, Image, and Spur Suppression Techniques

March 17, 2014
The need to measure spurious and harmonic signals is not new. However, emerging requirements include more of these measurements and specify demanding test conditions. In aerospace and defense applications, the task may be a search for known or unknown signals across a broad spectrum. In wireless communications, the need is to characterize increasingly complex devices in an ever-expanding number of conditions and device states - and do so as quickly as possible.

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