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White Papers

802.11ac Technology Introduction

January 17, 2012
802.11ac provides mechanisms to increase throughput and user experience of existing WLAN and will build on 802.11n-2009.

High Repeatability Voltage Variable Attenuator

January 17, 2012
A common function present in most RF and Microwave systems is the electronically controlled variable attenuator. At Valpey Fisher Corporation, improvements to two key areas of the MCM approach have been made resulting in lower attenuation error.

Testing True Mobile Device Performance with Advanced Over-the-Air Testing

January 17, 2012
by Charles Wright, Chief Scientist at Azimuth Systems

Characteristics of E-pHEMT vs. HBTs for PA Applications

January 17, 2012
Avaago White paper for Feb 2011

Keeping Solder in Place With Laser Ablation

January 17, 2012
To prevent unwanted flow, many PCB designers will install dams formed of glass or other dielectric materials to keep solder from shorting active areas on a circuit. But there is another solder damming technique being rapidly adopted—laser ablation. Considered to be more accurate and consistent than traditional solder damming methods.

WLAN 802.11n: From SISO to MIMO

January 17, 2012
This application note discusses WLAN standard IEEE 802.11n. It first describes the most important amendments to previous releases and the ambitious new measurement tasks. Then, it describes how to deal with these tasks using Rohde & Schwarz instruments.

What's the Best Wireless Transport Option for Uncompressed HDTV Video

January 17, 2012
Once the exclusive realm of scientific research and military use, wireless systems operating in the upper millimeter wave (MMW) regions are now providing cost-effective solutions for high-capacity commercial data transport needs. While MMW technology is nothing new, the growing volume of commercial use with associated economies of scale has significantly reduced system costs, making MMW systems more attractive to the general consumer.

eSMA Connector Technical Overview

January 17, 2012
This one page technical overview includes cut away descriptions of the mechanical engineering behind this innovative high-performance SMA. Additionally, performance curves are analyzed for typical VSWR through 20 GHz.

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