Industry News

A Harmonic and Size Reduced Ring Hybrid Using Hairpin-type LUCs

New hairpin-type low pass unit cells (LUC) are applied to the design of a microstrip hybrid ring for size reduction and harmonic suppression. This LUC is superior to the previously reported LUC in the simplicity of its structure and its ability to supp...
The hybrid ring has been widely used in microwave systems, due to its simplicity and performance. Because of the long electrical length of the ring itself, size reduction is becoming a major design consideration for many practical applications. Furthermore, when designing a microwave system, how to effectively handle the...
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Calculating Mismatch Uncertainty

Mismatch uncertainty is a very common and often underestimated source of error in microwave power measurements. It arises from an incomplete knowledge of the phase of the reflection coefficients of the source and load impedances, plus their interconnection, and is usually a large component of the overall measurement uncertainty...
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New Generation Travelling Wave Tubes

Building on its strong background in the development and production of Helix travelling wave tubes (TWT) for military airborne applications, e2v has developed a ‘new generation’ of TWTs that expands upon established airborne decoy applications and anticipates future system requirements. Over the past 20 years the company has manufactured...
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An RF Front-end Module for LTE/EUTRAN

The third generation partnership project (3GPP) responsible for the universal mobile telecommunication systems (UMTS) 3G system has defined the high-level requirements for the next generation of cellular telecommunications services. These requirements include reduced cost per bit, increased service provisioning, flexible use of existing and new frequency bands, simplified architecture...
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Retrospective: The MTT Symposia

A look at the first 25 years of the MTT National Symposium (IMS) written by MWJ founding editor Ted Saad. Copyright 1983 IEEE. Reprinted from IEEE Transactions on Microwave Theory and Techniques, Vol. MTT-31, no. 9, September 1983, The MTT Symposia, Th...
THE FIRST SYMPOSIUM sponsored and financed by, and designated as the Annual Meeting of the Professional Group on Microwave Theory and Techniques of the Institute of Radio Engineers, was held at the Western Union Auditorium in New York City on May 9 and 10, 1957. However, from the formation...
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New Waves: MTT-S Product Showcase

The following booth numbers are complete as of April 8, 2008. Heavy Wall Waveguide A-Alpha Waveguide offers heavy wall WR62, WR75, WR90, WR137, WR159, 6061 aluminum waveguide tube as well as WR62, WR75, WR90, WR112, WR137, WR187 heavy wall OFHC copper waveguide tube. These sizes along with all standard...
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Conformity For ELVA-1 in Russia

ELVA-1 Millimetre Wave Division has received Certificates of Conformity from the Russian Federation’s Ministry of Information Technologies and Communications (MITC) for its wireless communications technologies PPC-80/70 and PPC-95/92 digital radio links, providing data transmission up to 1250 Gbps. As the company continues to expand its presence in broadband markets...
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