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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. — January 2012 [Education] Broadside Coupler Channels 1 To 10 GHz Quadrature hybrid couplers are useful in communications systems and measurement applications. — January 2012 [Education] Bandpass Filters Feature Dual Bands Dual-band bandpass filters are often used in modern communications systems to isolate different operating frequency bands within the same network. — January 2012 [Education] Predict Mixer Noise Behavior Frequency mixers make most of the analog signal processing in RF/microwave receivers possible. — Roy Monzello December 2011 [Education] Simple Predistorter Polishes PA Performance Power amplifiers in modern communications systems must deliver highly linear and efficient operation to properly handle multiple-carrier signals with complex modulation. — December 2011 [Education] Design Tunable Filters Using Feedback Tunable microwave filters are useful in both commercial and military systems. — Taghi Moghimi Kandelousy December 2011 [Education] Matching DFDs To Target Applications Frequency measurements are critical to many tactical systems, such as direction-finding (DF) subsystems in electronic-warfare (EW) systems. — Kevin Burns November 2011 [Education] CMOS LNA Supports Many Receiver Standards Wireless receivers require front-end low-noise amplifiers (LNAs) to manipulate both ends of the dynamic range. — November 2011 [Education] Digital VGAs Boost Base-Station Performance Cellular base station performance and the performance of other wireless infrastructure systems depends on how well the systems can receive wireless signals, both from numerous smartphones and other wireless devices that link to each tower. Improving the signal-to-noise ratio (SNR) of the receiver, plus providing a wide range of gain control will ensure the base stations can deliver consistent performance while minimizing dropped connections due to signal loss or noise. — Christopher Stephens November 2011 [Education] Process MW Signals With High-Speed Logic Logic devices have improved in recent years due to advances in silicon germanium (SiGe), indium gallium phosphide (InGaP), and indium phosphide (InP) compound semiconductors. — Kenneth V. Puglia November 2011 [Education] Three-Way Divider Channels WiMAX Power dividers create the multiple versions of high-frequency signals so essential for signal processing in modern communications systems. — November 2011 [Education] When Is A Square Wave Truly Square? Square waves are useful in testing components and circuit at higher frequencies. — Philip Arnold October 2011 [Education] VVA Extends BW And Dynamic Range Voltage-variable attenuators (VVAs) ideally provide amplitude control over a broad frequency range with high repeatability and accuracy. — Chin-Leong Lim October 2011 [Education] CMOS LNA Boosts 64 GHz Millimeter-wave communications systems rely on affordable amplification with high signal gain and low noise figure. — October 2011 [Education] PIFAs Suit Mobile Wireless Applications Planar inverted-F antennas (PIFAs) are miniature designs that offer great versatility for both mobile and wireless applications. — October 2011 [Education] Making MIMO Receivers Smaller Fourth-generation (4G) wireless communications networks are predicted to lean heavily on multiple-input, multiple-output (MIMO) receiver technologies. — September 2011 [Education] Fabricate An 8.35-GHz Frequency Synthesizer Frequency synthesizers are vital components in communications systems, with a wide range of frequencies required for applications ranging from low-cost cellular telephones to millimeter-wave radios. Digital microwave radios (DMRs) have their own sets of demanding requirements for frequency synthesizers, since they typically rely on advanced digital modulation such as quadrature-amplitude-modulation (QAM) and quadrature-phase-shift-keying (QPSK) formats. Fortunately, ... — September 2011 [Education] Satellite Connects Cyclone Warning System Weather poses a danger in many parts of the world, and early warning measures are critical for preventing disasters in countries like India. — September 2011 [Education] DMS Structures Stop Bandpass Filter Harmonics Bandpass filters are key building blocks in modern communications systems. — September 2011 [Education] Mixers, Detectors Serve MM-Wave Bands Millimeter-wave frequency bands offer invaluable bandwidth for a variety of commercial, industrial, and military applications. Of course, with increasing frequency comes increasing challenges in the design of the high-performance components needed for signal processing at frequencies of 30 GHz and higher. With ultrawideband (UWB) communications systems, for example, high-speed amplitude-modulation (AM) modulators and detectors are needed in support of fast data transmission over millimeter-wave... — Jiri Polivka  prev. page
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