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

Michael Millhaem
No Comments
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

Joon-Won Jang and Hee-Yong Hwang
No Comments
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

S.S. Riaz Ahamed
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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

M.F. Ain, J.S. Mandeep, C.T. Chin, S.I.S. Hassan M.A.Othman and B.M. Nawang
No Comments
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

S. M. Stout-Grandy, J.S. Wight, A. Petosa, I.V. Minin and O.V. Minin
No Comments
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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Application Note: Parallel Capacitance in High Power RF Resistors

Florida RF Labs/EMC Technology
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WiMAX Backhaul No Longer Takes a Back Seat

Aviv Ronai, CMO, Ceragon Networks Ltd.
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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

Ravish R. Shah, Amit Patel, Ved Vyas Dwivedi and Hitesh B. Pandya
No Comments
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

Mark Elo, Marketing Director of RF Products, Keithley Instruments
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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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Microwave Band-pass Filter and Passive Devices Using Copper Metal Process on Al<sub>2</sub>O<sub>3</sub> Substrate

Chia Song Wu, Hsien-Chin Chiu, Yi-Feng Lin
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