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Industry News

Around the Circuit

Industry News Endwave Corp. , a provider of radio frequency subsystems for aero-defense, security and commercial wireless applications, announced the acquisition of all of the outstanding shares of capital stock of JCA Technology Inc. , a wholly-owned subsidiary of Bookham Technology plc., for approximately $6 M in cash. JCA...
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Web Update

Ultra-precision Service This company’s Web site offers a complete ultra-precision service for grinding, lapping, polishing, diamond sawing, laser machining and sizing a wide variety of metals (ferrous and non-ferrous). The company also offers carbide, ceramic, sapphire and other materials for industrial and scientific applications in the telecommunications, semiconductor, communications,...
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A Design Suite Built for Speed

Ask any engineer what is needed from an RF/microwave design tool and you will think you are stuck in a scene from Top Gun : “I feel the need for speed.” The thirst for greater simulation speed is never quenched, although model accuracy is just as important. Go across...
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The Design of a Dual Polarized Vivaldi Array

In this article, the design of a dual polarized Vivaldi antenna array is described. The Vivaldi elements are fed by broadband microstrip-to-slotline baluns. A 2:1 bandwidth (3.4 to 7 GHz) was achieved for VSWR, gain and cross-polarization isolation. Th...
The design for the Vivaldi antenna is motivated by the need for a broadband measurement antenna for an antenna test range (ATR). The ATR is capable of a dual axis rotation to create 3-D plots and to calculate the total radiated power (TRP). 1 The TRP calculation involves the...
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Potential Applications of PBG Engineered Structures in Microwave Engineering: Part II

The second part of this article reviews the potential applications of electromagnetic bandgap (EBG) structures in enhancing the performance of waveguides and antennas. A conductor-backed coplanar waveguide (CB-CPW) free of spurious transmission and a t...
In the new millennium, the explosion of info-communication technologies has brought many new broadband design challenges. To meet these challenges, designers are required to fulfill more functionality per unit volume. In the first part of this article, the basic PBG configurations and application of PBG structures in enhancing the...
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Automating and Optimizing High Performance LTCC Design

Low temperature co-fired ceramic (LTCC) is an increasingly popular technology that has the potential for increased reliability, improved electrical performance, size reduction and reduced cost. The LTCC process allows passive components such as resistors, inductors and capacitors to be embedded in a multilayer, integrated module with high density and...
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The Analysis and Design of a User Equipment Grade, All Digital Gain Control, Direct Conversion Radio Receiver

The analysis and design of a state-of-the-art, user equipment grade, all digital gain control, direct conversion radio receiver is presented. The receiver employs a logarithmic amplifier in the analog baseband to compress the signal dynamic range befor...
The direct conversion, all digital gain control (DC-ADGC) radio receiver employs logarithmic amplifiers in the analog baseband to compress the signal dynamic range before the analog-to-digital converter. An antilog function may then be used in the digital baseband to decompress the signal. Two implementations of the DC-ADGC receiver are...
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