RF & Microwave Electronics

Tiny Graphene Radios May Lead to Internet of Nano-Things

This image shows graphene-based nanoantennas (blue and red dots) on a chip. (Credit: University at Buffalo) For wireless communication, we’re all stuck on the same traffic-clogged highway — it’s a section of the electromagnetic spectrum known as radio waves. Advancements have made the highway more efficient, but bandwidth issues persist as wireless devices proliferate and the demand for data grows. The solution may be a nearby, mostly untapped area of the electromagnetic spectrum known as the terahertz band.

Posted in: News, RF & Microwave Electronics

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dB or not dB? Everything you ever wanted to know about decibels but were afraid to ask...

True or false: 30 dBm + 30 dBm = 60 dBm? Why does 1% work out to be -40 dB one time but then 0.1 dB or 0.05 dB the next time? These questions sometimes leave even experienced engineers scratching their heads. Decibels are found everywhere, including power levels, voltages, reflection coefficients, noise figures, field strengths and more. What is a decibel and how should we use it in our calculations? This Application Note is intended as a refresher on the subject of decibels.

Posted in: White Papers, White Papers, Aeronautics, Defense, RF & Microwave Electronics

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Chalcogenide Nanoionic-Based Radio Frequency Switch

The electrochemical switch is non-volatile, lacks moving parts that can fail, and is easy to fabricate.NASA’s Glenn Research Center has developed nanoionic-based radio frequency (RF) switches for use in devices that rely on low-power RF transmissions, such as automotive systems, RFID technology, and smartphones. These groundbreaking nanoionic switches operate at speeds of semiconductor switches, and are more reliable than microelectromechanical systems (MEMS) switches while retaining the superior RF performance and low power consumption found in MEMS, all without the need for higher electrical voltages. In this new process, metals are photo-dissolved into a chalcogenide glass and packaged with electrodes and a substrate to form a switch. Since the nanoionic-based switch is electrochemical in nature, it has certain advantages over switches that are mechanically based, including nonvolatility, lack of moving parts that can fail, ease and efficiency of activation, and ease of fabrication. This innovative device has the potential to replace MEMS and semiconductors in a wide range of switching systems, including rectifying antennas (rectennas) and other RF antenna arrays.

Posted in: Briefs, Electronic Components, Electronics & Computers, RF & Microwave Electronics

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Frequency Synthesizer

The THOR-16000-XA multi-output frequency synthesizer from EM Research, Reno, NV, features a single 800-MHz and dual 16-GHz RF outputs. The unit locks to an external 50-MHz reference and exhibits low phase noise at both RF output frequencies. At 100-KHz offset, phase noise is ≤118 dBc/Hz @ 800 MHz and ≤94 dBc/Hz @ 16 GHz. All three outputs have output power of +10 dBm, harmonics ≤30 dBc, spurs ≤70 dBc, and draw 570 mA current while supplied to +5V.

Posted in: Products, RF & Microwave Electronics

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Antenna Basics

The antenna is the most intrinsic component of all RF systems, yet the principles of antenna design and wave propagation are rarely discussed outside the entry level engineering classes. Rohde & Schwarz has developed an educational white paper on Antenna Basics to reteach the basic principles in a simplified manner.

Posted in: White Papers, White Papers, Aeronautics, Defense, Electronics & Computers, RF & Microwave Electronics

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Keysight Technologies Engineering Education and Research Resources DVD 2016

Keysight is enabling the next generation of engineers to tackle and solve the toughest electronic design and test challenges. With 200 new items in areas relating to education and research (Software Design & Simulation Solutions; Communications Technology; Test & Measurement Science; Nanotechnology & Material Measurement; Power, Energy & Automotive; and Classroom Applications), it includes application notes, white papers, case studies, videos, webcasts, and details on various Keysight solutions. Order your DVD today!    

Posted in: White Papers, Electronics & Computers, RF & Microwave Electronics, Test & Measurement

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New Algorithm Reveals Underground Water Levels

Researchers from Stanford University have used satellite data and a new computer algorithm to gauge groundwater levels in Colorado’s San Luis Valley agricultural basin. The technique "fills in" underground water levels in areas where quality data had been previously unavailable.

Posted in: News, Imaging, Visualization Software, Antennas, RF & Microwave Electronics

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White Papers

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Force Transfer Machines
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