Industry News

Mobile Consumers Prepared to Support Green Initiatives

The results of a recent consumer survey conducted in North America by ABI Research suggest that nearly half of those mobile consumers surveyed are somewhat likely or very likely to be influenced by suppliers' green credentials when purchasing services or devices. Respondents were asked whether they'd be more likely...
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Around the Circuit

Industry News Harris Corp. , an international communications and information technology company, has signed a definitive agreement to acquire the Tyco Electronics Wireless Systems business (formerly known as M/A-COM), an established provider of mission-critical wireless communications systems for law enforcement, fire and rescue, and public service organizations. Tyco Electronics...
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Backfire Disk-on-rod Antenna for Long-range Point-to-point Communications

This article describes a handy design method for a long backfire antenna, called for short a backfire antenna (BFA). It consists of the following basic elements: A feed F (dipole or assembly of crossed dipoles), a surface wave (SW) structure S (dipole array, metal disk-on-rod, dielectric rod, dielectric-covered metal...
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PIN Diode Performance Tradeoffs Across Package and Process Types

In today's global wireless industry, demands for semiconductor performance are becoming increasingly more challenging. Higher power and higher operating frequencies are two themes that permeate throughout this market space. Applications such as Magnetic Resonance Imaging (MRI) and UHF/VHF Tactical Radios require extremely high power handling PIN diodes at lower...
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Theory and Proposed Method for Determining Large-signal Return Loss or "Hot S22" for Power Amplifiers

Power amplifiers (PA) are a critical functional block in today's wireless communications. They are found in every cell phone, cordless phone, RF remote controller, etc. Any application requiring the wireless transmission of analog or digital signals will require a PA. In wireless equipment, the PAs are usually placed as...
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Ka-band Bandpass Filter Using a CPW Structure Technology with Copper on an Al2O3 Substrate

This article presents the performance of a Ka-band bandpass filter (BPF) using a coplanar waveguide (CPW) topology on an Al 2 O 3 substrate. A copper (Cu) metallization was also used in this investigation to improve the characteristics of the filter. The measured results of the BPF, with a...
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Design of Source Degenerated Cascode Dual Functionality LNA/PA for IEEE 802.15.4 (ZigBee)

This paper presents a new compact and comprehensive design methodology for RF CMOS source degenerated cascode dual functionality low noise amplifier (LNA) and power amplifier (PA) for the IEEE 802.15.4 standard (commercially known as ZigBee). Due to the need to meet the far apart performance requirements of both the...
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