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Industry News

To 20 GHz and Beyond: An Investigation into Passive Temperature Compensation

The current drive for increased bandwidth will ultimately pressure the wireless community to exploit higher operational frequencies beyond 20 GHz. A major obstacle associated with high frequency operation is signal distortion which can be the result of nonlinear effects, typically introduced by active devices. Signal distortion resides on the...
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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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Improving Multi-carrier PA Efficiency Using Envelope Tracking

Modern complex modulation schemes have the disadvantage of requiring linear power amplification characteristics, which compromises overall system efficiency because RF power amplifiers (RFPA) are much less efficient when operating in the linear region than they are at maximum power. The power amplifier and its associated components consume up to...
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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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Indra Gains Pleidaes Space Contract

In a contract with the Spanish Ministry of Defence worth €13.7 M, to be concluded in three years, Indra will develop, integrate and implement the ground segment of the Pleidaes Space Programme, a French constellation of high-resolution optical satellites for Earth observation. The systems to be implemented by Indra...
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A Modified Wilkinson Power Divider With Harmonic Suppression Characteristic

ABSTRACT This paper presents design, simulation and test results of a modified corporate type Wilkinson power divider / combiner in microstrip configuration where all the λ/4 branch line impedances have equal characteristic impedances (Z o ) instead of conventionally used π2Z . Electronic Band Gap (EBG) structure employed by...
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Motorola to Create Two Companies

Motorola’s Board of Directors has commenced a process to create two independent, publicly-traded companies. The move follows evaluation of the structural and strategic realignment of the company’s businesses and represents affirmative steps to position its Mobile Devices and Broadband & Mobility Solutions businesses for success, while creating value for...
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