Feature Articles

  1. Disney Researchers Devise Room-Scale Wireless Power Charging Method

    Scientists at Disney Research have demonstrated a new method of charging devices wirelessly across a room bathed in magnetic fields emanating from metalized walls, floor, and ceiling. This new technique makes it possible for any living room, office, or warehouse to deliver safe and ubiquitous wireless power to devices contained anywhere within.

  2. Blazing Fast Terahertz Transmission Exceeds 100 Gigabits Per Second At 300 GHz

    Japanese scientists have built a terahertz (THz) transmitter capable of transferring data at speeds of 105 gigabits per second using the frequency range between 290 GHz and 315 GHz. That's ten times faster than fifth-generation mobile networks (5G) offer.

  3. RF Architecture Choices For Next-Generation Handset Designs

    Today’s smartphone market has expanded into several categories with differing design goals and priorities, which require different approaches to RF front end (RFFE) integration. Modern packaging techniques make it possible to combine multiple RFFE components into integrated modules which help smartphone manufacturers accelerate the design and manufacture of new handsets. However, since there are two key smartphone categories – flagship phones and mid-tier and entry-level handsets – it raises the question of what would be the right level of RFFE integration and the best integration approach for each one?

  4. Addressing Carrier Aggregation Challenges Using Multiplexer Solutions

    How do operators avoid interference between bands while minimizing insertion loss? Multiplexers. They are designed to integrate the required filters for multiple aggregate bands, provide isolation within and between the bands, and allow them to simultaneously connect to the antenna. 

  5. Tufts Researchers Build A Chip-Sized, High-Speed Terahertz Modulator

    Researchers at Massachusetts-based Tufts University School of Engineering have built a chip-sized, low-power, high-speed modulator operating at above 14 gigahertz, with the potential to work at above 1 terahertz (THz) on the electromagnetic spectrum.

  6. UCLA's Electromagnetic Wave Router Offers Unlimited Bandwidth

    Electrical engineers at University of California, Los Angeles (UCLA) have developed a new type of circulator that uses a concept called Sequentially-Switched Delay Line (SSDL), which enables the simultaneous use of the same frequency for incoming and outgoing information in a single communications device.

  7. Advanced RF Filters For V2V And Other Automotive Applications

    Automobiles rely more and more on a growing number of wireless technologies to communicate with the outside world. Long-term technology goals include vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2X) communications for millions of automobiles as collision-avoidance and other intelligent transportation applications, which can be met using the IEEE 802.11p standard over the 5.9 GHz Dedicated Short Range Communications (DSRC) band. Avoiding interference in these applications requires high-performance RF bandpass filters capable of operating at high frequencies.

  8. Spray-On Conductive Concrete Shield Electronics From EMP Attacks

    Scientists from the University of Nebraska-Lincoln (UNL) have invented a type of concrete mixture that can shield electronic systems from electromagnetic pulse (EMP) attacks and coronal mass ejections (CMEs). It's a cost-effective alternative to current EMP shielding solutions like metal enclosures.

  9. Using PIN Limiter Diodes In Receiver Protectors

    A limiter PIN diode with a three-layer design can protect a receiver from large input signals while allowing the receiver to function normally when large signals aren’t present. A diode can also be used as an input-power-controlled RF variable resistance to produce attenuation that is a function of the diode characteristics as well as the incident signal amplitude. This application note describes the use of PIN limiter diodes in receiver protectors in detail, as well as their many design characteristics and benefits.

  10. How Should We Deal With Internet Of Things Cybersecurity Threats?

    The rapid proliferation of insecure internet-connected devices and systems is threatening critical healthcare, financial, transportation, energy and other infrastructure, to the extent that government and industry should be working together more closely than ever to mitigate risks.