Industry News

To Tweet or Not to Tweet

One of the latest social networking sites taking hold in the business world is Twitter. At IMS 2009 we had a handful of companies Twittering about the latest product releases, news and happenings on the show floor. We encouraged everyone to use the hashtag (or keyword) #IMS2009 and had...
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Interpreting Surveys

Surveys can be interesting critters. They either reinforce or disprove one's beliefs, which in turn leads to great clarity or confusion about how to proceed. The devil is in the detail when it comes to conducting a survey and interpreting the results. First of all, ask yourself - Is...
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Aligning Your Message: February, March and April 2010

This year, Microwave Journal ’s editorial focus will be on the microwave supply chain. Our reporting will consider trends in part specification, marketing and procurement as well as the relationship between suppliers and end-users, as this topic relates to the monthly theme. In February, our “High Frequency Components, Boards...
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Your Products on Display: 24/7

Throughout the Microwave Journal magazine and website, our audience is introduced to a wide array of new products. In the magazine, our “New Waves” section features a listing of these new products along with a vendor supplied graphic, short product review and company contact information. Perhaps you have noticed...
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Automating Radar Measurement Tasks throughout the Lifecycle of a Radar System

The measurements needed for radar differ depending on the job to be done and the type or radar to be characterized. Modern radar designs incorporate complicated pulses that present significant measurement challenges. Improvements to range, resolution and immunity to interference have implemented complex technologies such as phase modulated pulses,...
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Performance Improvement of Power Amplifiers Using an Asymmetrical Spurline Structure

In this article, an asymmetrical spurline structure with dual rejection bands is proposed to reduce the higher harmonics of microwave power amplifiers. To evaluate the effect of an asymmetrical spurline structure on microwave amplifiers, two InGaP HBT ...
Microstrip bandgap structures, such as photonic bandgap (PBG), electromagnetic bandgap (EBG) and defected ground structure (DGS), have recently been used to suppress high-order harmonics in antennas, amplifiers and oscillators 1-4 because they are simple to fabricate and have excellent filtering performance. For example, Radisic 1 introduced a wideband power...
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A Compact, Omni-directional, Circularly Polarized Microstrip Antenna

A new type of omni-directional, circularly polarized microstrip antenna employing a zero-order resonator (ZOR) loaded with arc-shaped stubs along the patch is presented. The concept of the proposed antenna uses a configuration of the horizontal magneti...
As a result of further research, antennas using metamaterials have been published. Planar leaky-wave antennas using transmission-line metamaterials have been reported with continuous beam scanning. 1-3 Feeding networks of microstrip patch arrays using transmission-line metamaterials have been designed, 4 which removes the inherent pattern squint resulting from the traditional...
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