Microwaves & RF http://mwrf.com/rss.xml en Bandpass Filter Combines High Selectivity, Rejection (.PDF Download) http://mwrf.com/datasheet/bandpass-filter-combines-high-selectivity-rejection-pdf-download <div class="node-body datasheet-body"><p>Broadband communications systems continue to expand, boosting the need for wideband bandpass filters (BPFs). To meet the needs of those systems, a compact BPF has been developed...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Sat, 22 Nov 2014 22:10:00 +0000 29911 at http://mwrf.com Bandpass Filter Combines High Selectivity, Rejection http://mwrf.com/passive-components/bandpass-filter-combines-high-selectivity-rejection <div class="field-byline"> Bo Zhang, S.S. Li, and J.-M. Huang </div> <div class="field-deck"> By using a stepped-impedance stub-loaded multimode resonator, this compact wideband filter achieves both high selectivity and good out-of-band rejection. </div> <div class="node-body article-body">A compact wideband filter using a stepped-impedance stub-loaded multimode resonator delivers both high selectivity and good out-of-band rejection.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/passive-components/bandpass-filter-combines-high-selectivity-rejection" target="_blank">read more</a></p> http://mwrf.com/passive-components/bandpass-filter-combines-high-selectivity-rejection#comments Commercial Industrial Passive components Sat, 22 Nov 2014 22:05:00 +0000 29891 at http://mwrf.com Automate RF Matrix Switching for Wireless Test http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test <div class="node-body article-body">The automation of RF test systems—especially for the verification testing of wireless handsets and network devices—promises to save time while improving accuracy for common repetitive test configurations. RF switching matrix devices could be a critical aspect in improving the reliability factor of these setups.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test" target="_blank">read more</a></p> http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test#comments Commercial Systems Test & Measurement Fri, 21 Nov 2014 20:59:00 +0000 29871 at http://mwrf.com <p>Cell-tower handoff testing is performed using a shielded chamber that precisely injects the signals of an emulated handoff scenario.</p> For Long-Range Communications, Is Narrowband “It”? http://mwrf.com/active-components/long-range-communications-narrowband-it <div class="node-body article-body">For reliable and efficient long-range RF communications, narrowband systems may be a prime choice. A comparison of spectral efficiency, coexistence, and battery lifetime between narrowband communications and coding-gain techniques could demonstrate narrowband technique’s superiority for certain applications.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/active-components/long-range-communications-narrowband-it" target="_blank">read more</a></p> http://mwrf.com/active-components/long-range-communications-narrowband-it#comments Active components Commercial Defense Systems Fri, 21 Nov 2014 20:34:00 +0000 29881 at http://mwrf.com Poster: Worldwide Spectrum Allocations http://mwrf.com/test-measurement/poster-worldwide-spectrum-allocations <div class="field-deck"> Sponsored by: Tektronix </div> <div class="node-body article-body">Keeping track and updated on the latest frequency allocations isn’t easy, so we’ve compiled the information into an easy-to-view poster.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/test-measurement/poster-worldwide-spectrum-allocations" target="_blank">read more</a></p> http://mwrf.com/test-measurement/poster-worldwide-spectrum-allocations#comments Test & Measurement Test & Measurement - analyzers White Paper Fri, 21 Nov 2014 16:41:00 +0000 29861 at http://mwrf.com Mitigate Distortions in Software-Defined Wideband Receivers http://mwrf.com/test-measurement-analyzers/mitigate-distortions-software-defined-wideband-receivers <div class="node-body article-body">To limit the effects of wideband nonlinear distortion on direct-conversion receivers, researchers in Finland and Germany have developed a method using a digital feed-forward algorithm for distortion mitigation. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/test-measurement-analyzers/mitigate-distortions-software-defined-wideband-receivers" target="_blank">read more</a></p> http://mwrf.com/test-measurement-analyzers/mitigate-distortions-software-defined-wideband-receivers#comments Commercial Test & Measurement - analyzers Test & Measurement - generators Fri, 21 Nov 2014 16:00:00 +0000 29841 at http://mwrf.com Why Measure a Microwave Device at Low Frequencies? http://mwrf.com/test-measurement-analyzers/why-measure-microwave-device-low-frequencies <div class="node-body article-body">Characterizing a microwave power amplifier or oscillator at low frequency can enable the modeling of nonlinear and noise parameters, which would be masked in traditional characterization measurements.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/test-measurement-analyzers/why-measure-microwave-device-low-frequencies" target="_blank">read more</a></p> http://mwrf.com/test-measurement-analyzers/why-measure-microwave-device-low-frequencies#comments Commercial Test & Measurement - analyzers Test & Measurement - generators Fri, 21 Nov 2014 15:46:00 +0000 29821 at http://mwrf.com DARPA Advances Microwave Photonics http://mwrf.com/systems/darpa-advances-microwave-photonics <div class="node-body article-body">DARPA-funded research efforts have led to many discoveries and advancements in microwave-photonic components, such as electro-optic modulators, high-power photodiodes, low-noise laser diodes, and microwave photonic link configurations. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/darpa-advances-microwave-photonics" target="_blank">read more</a></p> http://mwrf.com/systems/darpa-advances-microwave-photonics#comments Commercial Defense Systems Fri, 21 Nov 2014 15:10:00 +0000 29831 at http://mwrf.com Computer-Aided Engineering http://mwrf.com/microwaves-and-rf/2014-11-20 <div class="node-body magazine_issue-body"></div> <fieldset class="fieldgroup group-mag-teasers"> </fieldset> <fieldset class="fieldgroup group-publication-info"><legend>Publication Info</legend> </fieldset> <div class="og_rss_groups"></div> Thu, 20 Nov 2014 05:00:00 +0000 29851 at http://mwrf.com GaN Powers Amp Modules http://mwrf.com/active-components/gan-powers-amp-modules <div class="node-body article-body">A pair of power amplifier modules based on GaN technology provide a choice of 20 or 50 W output power from 6 to 18 GHz. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/active-components/gan-powers-amp-modules" target="_blank">read more</a></p> http://mwrf.com/active-components/gan-powers-amp-modules#comments Active components Commercial Defense Industrial Tue, 18 Nov 2014 22:01:00 +0000 29811 at http://mwrf.com PIN-Diode Limiter Protects Receiver LNAs http://mwrf.com/passive-components/pin-diode-limiter-protects-receiver-lnas <div class="node-body article-body">A PIN diode limiter provides passive protection for receivers and their front ends from 0.2 to 4.0 GHz. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/passive-components/pin-diode-limiter-protects-receiver-lnas" target="_blank">read more</a></p> http://mwrf.com/passive-components/pin-diode-limiter-protects-receiver-lnas#comments Skyworks Commercial Defense Industrial Passive components Tue, 18 Nov 2014 21:41:00 +0000 29801 at http://mwrf.com 9 IoT-Enabling RF Transceivers http://mwrf.com/active-components/9-iot-enabling-rf-transceivers <div class="field-deck"> As the electronics industry looks for ways to implant intelligent wireless interfaces/controllers in everything, many RF companies have already developed low-power, low-cost, and compact transceivers to help realize that future. </div> <div class="node-body article-body">One of the greatest limiting factors in a small-form-factor and low-power design is the transceiver. Using some of the innate benefits of Internet of Things system requirements, engineers have developed ever-smaller and more capable systems-on-a-chip to enable sophisticated wireless control/communication. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/active-components/9-iot-enabling-rf-transceivers" target="_blank">read more</a></p> http://mwrf.com/active-components/9-iot-enabling-rf-transceivers#comments Active components Commercial Industrial Tue, 18 Nov 2014 21:00:00 +0000 29781 at http://mwrf.com 9 IoT-Enabling RF Transceivers (.PDF Download) http://mwrf.com/datasheet/9-iot-enabling-rf-transceivers-pdf-download <div class="node-body datasheet-body"><p>Many science-fiction authors have predicted a time when urban environments will be intelligently interconnected and share a wealth of information. If that statement gives you flashbacks of the movie &quot;Minority Report,&quot; your vision is...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Tue, 18 Nov 2014 19:13:00 +0000 29791 at http://mwrf.com Interview: Philip Sorrells, CommScope’s Vice President of Strategic Marketing http://mwrf.com/semiconductors/interview-philip-sorrells-commscope-s-vice-president-strategic-marketing <div class="node-body article-body">CommScope’s Philip Sorrells discusses the technologies and challenges of greatest importance to the wireless-infrastructure industry.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/semiconductors/interview-philip-sorrells-commscope-s-vice-president-strategic-marketing" target="_blank">read more</a></p> http://mwrf.com/semiconductors/interview-philip-sorrells-commscope-s-vice-president-strategic-marketing#comments Commercial Interviews Semiconductors Mon, 17 Nov 2014 22:05:00 +0000 29761 at http://mwrf.com Interview: Philip Sorrells, CommScope’s Vice President of Strategic Marketing (.PDF Download) http://mwrf.com/datasheet/interview-philip-sorrells-commscope-s-vice-president-strategic-marketing-pdf-download <div class="node-body datasheet-body"><p>JJD: What devices are most critical to the wireless-infrastructure industry? PL: It is challenging to identify one or two pieces of equipment that are the most critical. Every device in the radio-frequency (RF) path...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Mon, 17 Nov 2014 21:32:00 +0000 29771 at http://mwrf.com New Beacon System to Feature Batteries Lasting Up to Six Years http://mwrf.com/components/new-beacon-system-feature-batteries-lasting-six-years <div class="node-body article-body">Startup company Kontakt.io, a beacon communication firm based in Poland, has specified Nordic’s nRF51822 Systems-on-Chip (SoCs) to provide the Bluetooth Smart Wireless connectivity in its Cloud Beacon pre-integrated beacon hardware platform.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/components/new-beacon-system-feature-batteries-lasting-six-years" target="_blank">read more</a></p> http://mwrf.com/components/new-beacon-system-feature-batteries-lasting-six-years#comments Commercial Components Editor Columns Mon, 17 Nov 2014 21:00:00 +0000 29741 at http://mwrf.com New Beacon System to Feature Batteries Lasting Up to Six Years (.PDF Download) http://mwrf.com/datasheet/new-beacon-system-feature-batteries-lasting-six-years-pdf-download <div class="node-body datasheet-body"><p>Startup company Kontakt.io, a beacon communication firm based in Poland, has specified Nordic&rsquo;s nRF51822 Systems-on-Chip (SoCs) to provide the Bluetooth Smart Wireless connectivity in its Cloud Beacon pre-integrated beacon hardware platform. An important element of the decision by the Polish company to use...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Mon, 17 Nov 2014 20:58:00 +0000 29751 at http://mwrf.com Retrodirective Array Fits Compact Designs http://mwrf.com/passive-components/retrodirective-array-fits-compact-designs <div class="field-byline"> Lei Chen, Chao Wang, Jian-Feng Yu, and Xiao-Wei Shi </div> <div class="field-deck"> This end-fire retrodirective array builds on a passive FET mixer to provide both receive and retransmit functions within an extremely compact structure. </div> <div class="node-body article-body">An end-fire retrodirective array provides receive and retransmit functions using a passive mixer. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/passive-components/retrodirective-array-fits-compact-designs" target="_blank">read more</a></p> http://mwrf.com/passive-components/retrodirective-array-fits-compact-designs#comments Commercial Defense Industrial Passive components Mon, 17 Nov 2014 20:14:00 +0000 29561 at http://mwrf.com Single CDTA Powers Universal Bi-Quad Filter http://mwrf.com/passive-components/single-cdta-powers-universal-bi-quad-filter <div class="field-byline"> Hairong Lin and Chunhua Wang </div> <div class="field-deck"> A low-voltage current-differencing transconductance amplifier provides the basis for a relatively simple universal biquad filter. </div> <div class="node-body article-body">A current differencing transconductance amplifier serves as the basis for five different types of filters. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/passive-components/single-cdta-powers-universal-bi-quad-filter" target="_blank">read more</a></p> http://mwrf.com/passive-components/single-cdta-powers-universal-bi-quad-filter#comments Commercial Defense Industrial Passive components Mon, 17 Nov 2014 19:29:00 +0000 29551 at http://mwrf.com Algorithm Aids RFID Anti-Collision Success http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success <div class="field-byline"> Guihua Yang, Junchi Ma, Yukai Gao, Baohong Fu, and Chunmei Wu </div> <div class="field-deck"> This algorithm was developed to enhance the operation of RFID systems by properly identifying tags, even under spectrally dense conditions where collisions can occur. </div> <div class="node-body article-body">This algorithm combines several benefits to efficiently and effectively identify tags in RFID systems.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success" target="_blank">read more</a></p> http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success#comments Commercial Defense Industrial Systems Mon, 17 Nov 2014 19:24:00 +0000 29541 at http://mwrf.com Quiet VCO Tunes 2.5-GHz WiMAX http://mwrf.com/components/quiet-vco-tunes-25-ghz-wimax <div class="field-byline"> Wei Wang, Yao Liang, Chen Zhao, Wenqi Cai, Xiao Mo, Jun Yuan, and Guanyu Wang </div> <div class="field-deck"> Designed for WiMAX IEEE 802.16m applications at 2.5 GHz, this tunable oscillator achieves outstanding phase-noise performance in a compact circuit layout with low power consumption. </div> <div class="node-body article-body">Designed for WiMAX IEEE 802.16m applications at 2.5 GHz, this tunable oscillator achieves outstanding phase-noise performance in a compact circuit layout with low power consumption.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/components/quiet-vco-tunes-25-ghz-wimax" target="_blank">read more</a></p> http://mwrf.com/components/quiet-vco-tunes-25-ghz-wimax#comments Commercial Components Mon, 17 Nov 2014 16:24:00 +0000 29531 at http://mwrf.com FPGA-Based System Helps Validate VMCK http://mwrf.com/systems/fpga-based-system-helps-validate-vmck <div class="field-byline"> Liu Yang, Guoxin Zheng, and Zhongpin Luo </div> <div class="field-deck"> Advanced modulation/demodulation formats such as very-minimum-chirp-keying (VMCK) approaches can be produced by means of FPGA-based experimental circuits. </div> <div class="node-body article-body">Advanced very-minimum-chirp-keying (VMCK) modulation is evaluated in an experimental system and model. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/fpga-based-system-helps-validate-vmck" target="_blank">read more</a></p> http://mwrf.com/systems/fpga-based-system-helps-validate-vmck#comments Commercial Systems Mon, 17 Nov 2014 15:35:00 +0000 29521 at http://mwrf.com Retrodirective Array Fits Compact Designs (.PDF Download) http://mwrf.com/datasheet/retrodirective-array-fits-compact-designs-pdf-download <div class="node-body datasheet-body"><p>Retrodirective arrays represent a novel form of antenna array capable of unique traits, including self-beam tracking, high reaction speed, and low cost. These antenna configurations are well suited...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong><br /> &nbsp;</p> </div> <div class="og_rss_groups"></div> Gold Sat, 15 Nov 2014 17:58:00 +0000 29731 at http://mwrf.com Single CDTA Powers Universal Bi-Quad Filter (.PDF Download) http://mwrf.com/datasheet/single-cdta-powers-universal-bi-quad-filter-pdf-download <div class="node-body datasheet-body"><p>Filters come with many responses. Fortunately, a simple design based on a current differencing transconductance amplifier (CDTA) and a few additional passive circuit elements can produce all standard filter functions without significant changes in the basic structure. The filter is well suited for use in integrated-circuit (IC) designs...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Sat, 15 Nov 2014 17:50:00 +0000 29721 at http://mwrf.com Algorithm Aids RFID Anti-Collision Success (.PDF Download) http://mwrf.com/datasheet/algorithm-aids-rfid-anti-collision-success-pdf-download <div class="node-body datasheet-body"><p>For all of their convenience, radio-frequency-identification (RFID) systems have several shortcomings, including problems with signal collisions in crowded electromagnetic (EM) environments. Fortunately, it is possible to analyze and understand...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong><br /> &nbsp;</p> <p>&nbsp;</p> </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/datasheet/algorithm-aids-rfid-anti-collision-success-pdf-download" target="_blank">read more</a></p> Gold Sat, 15 Nov 2014 17:46:00 +0000 29711 at http://mwrf.com Quiet VCO Tunes 2.5-GHz WiMAX (.PDF Download) http://mwrf.com/datasheet/quiet-vco-tunes-25-ghz-wimax-pdf-download <div class="node-body datasheet-body"><p>Low-noise oscillators are essential for many communications systems, especially when they can maintain their low noise characteristics over wide frequency tuning ranges. As a boost for 2.5-GHz IEEE 802.16m WiMAX applications...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Sat, 15 Nov 2014 17:41:00 +0000 29701 at http://mwrf.com FPGA-Based System Helps Validate VMCK (.PDF Download) http://mwrf.com/datasheet/fpga-based-system-helps-validate-vmck-pdf-download <div class="node-body datasheet-body"><p>Advanced modulation formats, such as very-minimum-chirp-keying (VMCK) modulation, can provide extremely high bandwidth efficiency when high data rates are desired for limited available bandwidths. To better understand the use of VMCK modulation...</p> </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/datasheet/fpga-based-system-helps-validate-vmck-pdf-download" target="_blank">read more</a></p> Gold Sat, 15 Nov 2014 16:31:00 +0000 29691 at http://mwrf.com Amplifier Modules Boost 6 to 18 GHz http://mwrf.com/active-components/amplifier-modules-boost-6-18-ghz <div class="field-deck"> Based on traveling-wave tubes, these high-power amplifier modules can be used for continuous or pulsed signals across broad bandwidths at output-power levels to 200 W or more. </div> <div class="node-body article-body">A line of amplifiers based on traveling-wave tubes provides high output-power levels at microwave and millimeter-wave frequencies.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/active-components/amplifier-modules-boost-6-18-ghz" target="_blank">read more</a></p> http://mwrf.com/active-components/amplifier-modules-boost-6-18-ghz#comments Active components Commercial Defense Industrial Fri, 14 Nov 2014 21:16:00 +0000 29571 at http://mwrf.com Amplifier Modules Boost 6 to 18 GHz (.PDF Download) http://mwrf.com/datasheet/amplifier-modules-boost-6-18-ghz-pdf-download <div class="node-body datasheet-body"><p>Traveling-wave tubes (TWTs) are one of the older technologies in the RF/microwave industry, but certainly not an obsolete one. As some rack-mount amplifiers and amplifier modules recently released from dB Control show...</p> <p><strong>Register or sign in below to download the full article in .PDF format, including high resolution graphics and schematics when applicable.</strong></p> </div> <div class="og_rss_groups"></div> Gold Fri, 14 Nov 2014 21:11:00 +0000 29681 at http://mwrf.com What’s the Difference Between Broadband and Narrowband RF Communications? http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications <div class="field-deck"> The debate between broadband and narrowband communication techniques is leaving many engineers and radio-deployment specialists debating the benefits of enhanced data rates and long-range reliable communication links. </div> <div class="node-body article-body">Substantial tradeoffs arise when choosing between a narrowband or broadband architecture for radio deployments. These tradeoffs largely depend upon the requirements of the application and type of communications system, data rate, power specification, and range requirements. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications" target="_blank">read more</a></p> http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications#comments Active components Commercial Defense Systems Fri, 14 Nov 2014 20:13:00 +0000 29581 at http://mwrf.com