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White Papers

Software-defined Radio: The Next Wave in RF Test Instrumentation?

April 6, 2008
Software-defined radio is explored as a technique that can help test vendors keep pace with the rapid development of new standards in the communications market.
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Design of a Miniaturized Quarter-circular-slot UWB Antenna

March 6, 2008
A miniaturized quarter-circular-slot UWB (QCS-UWB) antenna using field-pattern analysis of the circular-slot UWB prototype antenna is proposed. Even though the proposed antenna has only the quarter part of the prototype antenna it maintains UWB antenna characteristics. The measured gain of the miniaturized antenna from 3.0 GHz to 12.0 GHz is within -0.1 dBi ~ 1.6 dBi, which is comparable to the prototype antenna’s gain, -2.7 dBi ~ 3.1 dBi.
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Performance Analysis of OFDM

March 6, 2008
Orthogonal Frequency-Division Multiplexing (OFDM) — essentially identical to Coded OFDM (COFDM) is explored.
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Design of a Four Feeding Microstrip Patch Antenna

March 6, 2008
A four feeding microstrip antenna operating at 2.0 GHz and match to a 50Ω impedance designed using Agilent’s Advanced Design System (ADS) and Computer Simulation Technology (CST) simulation tools is presented.
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Recent Advances in Fresnel Zone Plate Antenna Technology

March 6, 2008
Recent advances in Fresnel zone plate antenna technology, including sidelobe reduction and control over sidelobe location are explored, as well as the focusing resolution of Fresnel zone plate antennas for sub-wavelength focal distances.
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WiMAX Backhaul No Longer Takes a Back Seat

January 30, 2008
The topic of much debate, WiMAX is rapidly becoming a growing market. With more and more service providers and enterprises jumping on the WiMAX bandwagon. The next step is to accelerate the deployment of WiMAX worldwide by leveraging the numerous benefits of wireless backhaul.
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Design, Development and Fabrication of Post-coupled Bandpass Waveguide Filter @ 11.2 GHz for a Radiometer

January 30, 2008
The design, development and fabrication of a post-coupled bandpass waveguide filter @ 11.2 GHz is presented.
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Orthogonal Frequency Division Multiplexing

January 30, 2008
This paper will explain what OFDM is, why it’s important, where it’s used, and what test instrumentation is required to maintain it.
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