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April 2012 [Education] Optimizing PLL Performance Levels Frequency synthesizers based on phase-locked loops (PLLs) are widely used in radio communications systems. Such signal sources are known for their high frequency resolution and fast switching speed, while maintaining good frequency accuracy over time and changing temperatures. — April 2012 [Education] Sorting Through EM Simulators Electromagnetic (EM) simulation software has become an almost essential tool for high-frequency/high-speed circuit designers, helping provide accurate predictions of real-world performance before a design is fabricated. — Dave Morris April 2012 [Education] Two-Horn Antenna Aims At UWB Use Ultrawideband (UWB) communications from 3.1 to 10.6 GHz, the band made unlicensed by the United States Federal Communications Commission (FCC), is attractive for a wide range of commercial applications. — April 2012 [Education] Design a CDBA In 0.18-µm CMOS Current-mode signal-processing techniques offer some advantages compared to voltage-mode techniques. — April 2012 [Education] Resonators Support UHF MRI Systems Magnetic resonance imaging (MRI) is widely used for noninvasive exploration inside the human body. — March 2012 [Education] UWB Lowpass Filter Features Wide Stopband Filters are essential to the advancement of wireless communications networks, especially when a variety of different communications systems must be co-located or in close proximity. — Milad Mirzaee March 2012 [Education] Synthesizer Serves MB-OFDM UWB Short-range wireless communications have relied on such standards as Bluetooth and wireless local area networks (WLANs) to move data between points. — March 2012 [Education] Tackling Multi-Bit Attenuator Designs Digital step attenuators (DSAs) are versatile components that allow precise control of amplitude levels in a variety of RF/microwave systems. — March 2012 [Education] Compare Compact UHF Antennas Smaller wireless devices demand smaller antennas. — March 2012 [Education] LTE Front End Scans Three Bands Long Term Evolution (LTE) third-generation (3G) cellular systems are designed for faster data transfers than earlier cellular networks, with uplink speed to 50 Mb/s and downlink speeds to 100 Mb/s. — March 2012 [Education] CPW Antenna Aims At UWB Applications Low-power communications by means of ultrawideband (UWB) technology holds great promise for effective short-range transfer of large amounts of data at high data rates. — March 2012 [Education] Fabricating HF Opamp Filters Filters have been formed from operational amplifiers (opamps) for audio circuits going back many decades. — Tim Daughters February 2012 [Education] Current Reuse Enhances UWB LNA Ultrawideband (UWB) communications offers the potential of high-speed data transfers across short distances at low power levels. — February 2012 [Education] CMOS Yields UHF RFID Transmitter Radio-frequency identification (RFID) is a versatile wireless technology for tracking and identifying items over short distances. — February 2012 [Education] Assemble A Compact UWB Printed Monopole Ultrawideband (UWB) communications technology offers great promise for handling impressive data rates at low transmit power levels. — February 2012 [Education] Compensating For DGS Filter Loss Novel circuit design elements such as defected-ground-structure (DGS) resonators and electromagnetic-band-gap (EBG) structures have helped shrink the size of microstrip circuits, including filters and antennas. — February 2012 [Education] Tiny UWB Antenna Notches Two Bands Ultrawideband (UWB) technology shows great promise for high-data-rate, short-distance communications applications. — February 2012 [Education] Filter’s Multiple TZs Afford Flexible Tuning High filter selectivity is desirable for rejecting unwanted spurious signals and for separating multiple channels in communications systems. — February 2012 [Education] C-Shaped Slot Serves UWB Antenna For ultrawideband (UWB) communications technologies to gain momentum worldwide, compact, high-performance antennas will be needed. — January 2012 [Education] Perfect A PLL LTE Synthesizer Mobile communications systems have evolved from handling voice exclusively to providing voice, data, and even video transmissions. —  prev. page
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