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Industry News

A Compact Microstrip Stepped-impedance Resonator and Filter

The resonant performance of T-shaped microstrip resonators, a kind of stepped-impedance resonator (SIR), is computed and analyzed. Two novel SRI filters, a double-T-shaped bandstop filter and a double-H-shaped bandpass filter, are designed and their pe...
Microstrip resonators have very important applications in microwave or millimeter-wave systems. They are important components of microstrip filters,1–2 microstrip oscillators3 and microstrip antennas,4 and enable microwave equipment miniaturization with improved performance. A stepped-impedance resonator (SIR) is the fundamental resonant element that can operate from RF to millimeter-wave frequencies and...
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A 40 to 900 MHz CMOS Broadband Differential LNA for a DTV RF Tuner

This article describes a 40 to 900 MHz CMOS broadband differential LNA with gain control for a DTV RF tuner application. The LNA is fabricated in a TSMC 0.18 µm CMOS process. The broadband differential LNA uses dual-feedback and shunt-shunt feedback to...
Digital TV offers a far wider choice of TV viewing and a reduction of the interference that may be experienced on analog TV. Recently, many RF circuits realized in the CMOS process have been reported and the 0.18 mm process is a good candidate for highly integrated systems-on-chip (SOC)...
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EM Enables Classic Filter Technique

Electromagnetic (EM) tools are indispensable for simulating high frequency designs, but they are poorly suited for synthesizing filters that require the determination of multiple parameters. Randall Rhea This article describes how to use EM simulation to aid a classic and under-utilized technique for filter design. The classic technique requires...
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Concept and Method of High Efficiency in a Precision Ka-band Subminiature Coaxial Connector

This article presents the design approach and test results of a Ka-band narrow flange receptacle (NFR), subminiature version A (SMA) connector based on transmission line theory, involving multi-step impedances and air-layer characteristics to increase ...
During the late 1950s and early 1960s, 7 mm coaxial transmission lines with standard SMA connectors were only used at frequencies between 10 and 12 GHz. In the mid-1960s, the US Department of Commerce established the Joint Industry Research Committee for the Standardization of Miniature Precision Coaxial Connectors (JIRF/SMPCC)....
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An LTCC Mixer for Instrumentation and Military Applications

Test instrumentation may need to accommodate signals having a wide-percentage frequency bandwidth. For ease of processing such RF signals, the input can be upconverted in order to reduce the percentage bandwidth. To facilitate upconversion ahead of higher frequency receivers, Mini-Circuits has developed a high performance passive mixer that allows...
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MEMS SWITCH CHALLENGES

Thinking that they were facing a “normal” set of technical challenges, MEMS switch developers consistently underestimated the difference between being able to sample a few prototype devices from a wafer and consistently manufacturing products that deliver high levels of quality and reliability. This created market expectations that are only...
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Defense Spending Increases Provides Robust Market For Compound Semiconductors

Radar, Communications, Smart Munitions, and Electronic Warfare Contract Awards Exceed $16 billion in 2006
The newly released Strategy Analytics GaAs and Compound Semiconductor Technologies (GaAs) service report, "Defense Spending Increases Provide Robust Market for Compound Semiconductors," projects that the market for GaAs devices will see continued growth at a CAAGR of 8% through to 2010. GaAs remains a staple ingredient in military and...
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Laird Technologies Acquires AeroComm

Laird Technologies , a designer and manufacturer of antenna solutions, electromagnetic interference (EMI) shielding products, telematics, signal integrity products and thermal management solutions, announced the acquisition of AeroComm for $38 M. AeroComm is a designer and manufacturer of wireless communications systems for low- to mid-volume OEM applications where high...
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NXP and TSMC Strengthen R&D Cooperation

NXP Semiconductors and TSMC will strengthen their cooperation to include advanced R&D in CMOS process technologies as well as having a manufacturing partnership. The strengthened global R&D cooperation will be built upon the existing NXP research organization at the IMEC facilities in Leuven, Belgium, and TSMC corporate R&D in...
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EPCOS Goes On-line With China RoHS Information

EPCOS now offers its customers an on-line service to help them comply with the requirements of China’s new law on hazardous substances in electronic products. China RoHS, officially the Administration on the Control of Pollution Caused by Electronic Information Products (ACPEIP), regulates products containing any of six hazardous substances:...
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