Whitepapers

Automatic Test Procedure for RF Characterization of C-band Rotary Field Phase Shifter

This article presents the concept and methodology for the realization of an automatic test procedure based on LabVIEW for RF characterisation of a C-band rotary field phase shifter. Using this software, all the characteristics of a phase shifter intended for phased array application, such as differential phase shift, insertion loss, return loss, rms phase error, insertion phase etc, are measured and displayed graphically.
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What is Packet Microwave?

The growth in mobile broadband services is driving a sea change in the technologies employed to build and operate mobile networks. In particular, the introduction of all-IP transport promises to replace traditional time division multiplexed (TDM) networks to provide network scalability and lower operational costs. To support this network evolution, a new class of licensed microwave backhaul solutions has been introduced to the market, known variously as Packet All-IP or Next Generation radios.
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Optimizing Millimeter-Wave System Design to Boost Network Performance While Reducing Costs

To meet growing subscriber demand, mobile operators are forced to add network capacity to enable the delivery of bandwidth-intensive data services. Nowhere are these challenges felt more acutely than in the backhaul network. As operators migrate to all-Ethernet/IP backhaul networks, fiber backhaul can provide the required capacity and beyond, wherever it is deployed; however, the fiber reach is often limited and deploying new fiber links is often prohibitively expensive. Copper has limited capacity and reach, and “traditional” microwave links suffer from spectrum congestion and limited channel sizes. Therefore, current packet-based transport networks fall short in meeting the ever increasing backhaul demands. Operators who rely on wireless backhaul are turning to new frequency bands to provide this capacity while reducing costs. The newly-allocated E-Band spectrum (71-76 GHz, 81-86 GHz and 92-95 GHz) – has many clear technological and economic advantages.
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Using X-Parameters to Characterize and Model Long-Term Memory Effects of Wideband Modulated Signals

This paper addresses the challenges of working with semiconductor memory-effects when designing high-frequency power amplifiers. The paper presents a discussion of what memory-effects are, how they impact amplifier performance, and how to characterize memory-effects using X-parameters in order to achieve optimum amplifier performance.
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