CONNECT WITH MWRF
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50th Anniversary Issue [Feedback] The Readers Have Their Say Independent of subject matter, all publications ultimately owe their success (or failure) to how well they know their audience—and by extension, how successfully they can cater to its needs. November 2010 [Components] Varactor Diodes Cover Capacitance Changes From 0 To 5 V Three miniature 0402 varactor diodes target voltage-controlled-oscillator (VCO), phase-shifter, and voltage-tuned-filter applications that require a high-quality-factor (high-Q) and low-resistance varactor with a large capacitance change from 0 to 5 V. The SMV1247-040LF and SMV1249-040LF are silicon, surface-mount, and hyperabrupt tuning varactor diodes with a typical capacitance ratio of 10 from 0.3 to 4.7 V for the SMV1247-040LF and 12 for the SMV1249-040LF. They are... November 2010 [Components] Sector Antenna Boasts 13-dBi Gain The SAH24-120- 12 horizontally polarized sector antenna operates from 2400 to 2500 MHz with 13 dBi gain and 120-deg. expanded- beamwidth horizontal polarization (HPOL). HPOL increases the range of the antenna over flat surfaces. It also minimizes the vertically polarized (VPOL) signals produced by electrical and wireless devices by cancelling them out. Optimized for low cross polarization and low sidelobes, the SAH24-120-12 is especially... November 2010 [Components] Four-Way Power Divider Spans 20 To 3000 MHz The DL42030 is the newest member of a family of power dividers/combiners and couplers covering 20 to 3000 MHz. This four-way divider boasts phase balance of ±2°. Typically, it offers isolation performance of 25 dB while exhibiting insertion loss of 2.25 dB. The DL42030 provides input and output return losses of 14 and 18 dB, respectively. It features isolation of at least 15 dB while VSWR is a maximum of 1.50:1. It boasts amplitude balance to 0.3 dB and... November 2010 [Components] Tri-Band Log-Periodic Antenna Delivers Gain To 9 dBi Designed for long-distance directional communication, the DB1-LP series of triband, log-periodic antennas operate from 824 to 960 MHz, 1.71 to 2.17 GHz, and 2.40 to 2.48 GHz. The antenna family provides vertical polarization, typical VSWR of =1.50:1 at center frequency, and a front-to-back ratio of at least 20 dB. It offers gain of -8.5 dBi from 824 to 960 MHz and -9.0 dBi from both 1.71 to 2.17 GHz and 2.40 to 2.48 GHz. The antennas handle power to 100 W. The 2.4-lb.... November 2010 [Components] 90-Deg. Hybrid Coupler Operates To 3000 MHz Providing 3-dB signal isolation, the model IPP- 7032 is a 90-deg. surfacemount hybrid coupler that operates from 500 to 3000 MHz. The coupler will combine two signals totaling as much as 100 W continuous wave (CW) of output power. It exhibits insertion loss of less than 0.60 dB with VSWR below 1.30:1. The coupler provides amplitude balance better than ±0.80 dB with phase balance of better than ±5 deg. The coupler provides isolation beyond 18 dB. It comes in a ... November 2010 [Components] Chip Resistor Sports 1-Percent Tolerance To meet the continuing demand for miniature components for portable devices, the 01005-RK73H1F precision surface-mount resistor measures just 0.4 x 0.2 x 0.1 mm. The component is therefore 55 percent smaller than a 0201-size chip resistor. This thick-film resistor has a power rating of 0.33 W, a resistance range of 10 W ~ 1 M at ±1 percent tolerance, and a temperature coefficient of resistance (TCR) of ±250 ~ ±300 ppm/°C. The surface-mount resistor is... November 2010 [Components] 6-dB Directional Coupler Spans 800 To 2500 MHz Designed for wireless and general-purpose applications from 800 to 2500 MHz, the AM1650DC838 directional coupler provides 6 dB of coupling with flatness of ±1 dB across its frequency range. It exhibits insertion loss of 1.5 dB or less with VSWR of 1.20:1 or better. The coupler’s power-handling capability is a maximum of 40 W. It offers 20 dB directivity with minimal isolation of 20 dB. Intermodulation distortion for the AM1650DC838 is better than -140 dBc. The coupler uses... November 2010 [Components] Directional Coupler Covers 225 MHz To 10 GHz To serve both commercial and military applications, the model 3000-10 coaxial directional coupler delivers 10 dB of coupling from 225 MHz to 10 GHz. It handles 200 W average and 10 kW peak RF power. The coupler offers a minimum of 30 dB directivity. It exhibits insertion loss of 0.7 dB or less with VSWR to 1.15:1. It offers maximum deviation from nominal coupling of ±1.2 dB absolute calibration accuracy of ±0.1 dB per 10-dB step. The coupler, which uses ... November 2010 [Components] Online Modeling Tool Speeds Design Of 3D Interconnects To save time, design engineers might find it useful to import preconfigured connector solutions into prototype designs. Such a capability would give them the flexibility to try different approaches. Now, an online modeling tool enables design engineers to dynamically create virtual three-dimensional (3D) connector models—even for designs that have yet to be manufactured. This new capability builds on ITT Interconnect Solutions’ existing web-based configuration ... November 2010 [Components] Kit Seals Connection For 100+ Mating Cycles Fiber-to-the-antenna (FTTA), remote radio-head equipment, and similar outdoor applications clearly demand an environmentally protected interface. To satisfy this need, the field-installable R2CT connection kit provides a waterproof, sealed connection. The kit is designed for optical systems using SFP transceivers and duplex LC-terminated fiber-optic cable. The kit can be reused, allowing cables and transceivers to be changed in the field—including the... November 2010 [Components] Precision Adapters Provide Low VSWR To 18 GHz To provide ruggedness and versatility in lab or field applications, a line of test adapters features precision-machined, passivated stainless-steel construction for long life, repeated use, and corrosion resistance. All adapters provide epoxy-captivated components and are designed for superior electrical performance with low loss and guaranteed low voltage standing wave ratio (VSWR) to 18 GHz. At 18 GHz, for example, the P2RSA-3703 provides VSWR below 1.20:1 maximum. It... November 2010 [Components] Interconnect Assemblies Pass 40- And 100-Gb/s Interoperability Testing A recent plugfest for IEEE standard 802.3ba-2010 40- and 100-Gb/s Ethernet underscored the commercial viability of high-speed Ethernet to the network-infrastructure market. Hosted by Ixia at its iSimCity lab in Santa Clara, CA and assisted by the University of New Hampshire Interoperability Lab, the Ethernet Alliance’s (EA’s) Higher Speed Ethernet (HSE) subcommittee interoperability plugfest was designed to verify interoperability of 40- and 100- Gb/s test... November 2010 [Components] 40-Gb/s Multicoax Cable Assemblies Suit Digital Test A line of 40-Gb/s multicoax cable assemblies is available for making coaxial-to-printed- circuit-board (PCB) transitions while using less board space. The system’s reliable mating and ease of use make it especially suited for benchtop test systems and within automated test equipment (ATE). A broad range of configurations is available with flexible cable assemblies and compact PCB connectors. Features include an operating range to 40 Gb/s and a pitch of 4 mm (0.16 in.). A pin... November 2010 [Components] Connector Provides 100-M Insulation Resistance To give avionics manufacturers continual weight reductions, streamlined maintenance procedures, and aerodynamic efficiency, a next-generation version of the ARINC 600 receptacle connector has been developed. From -65° to +125°C, it offers a minimum dielectric withstanding voltage (DWV) of 1500 VAC root mean square (RMS) at 60 Hz and sea level versus 500 VAC RMS at 60 Hz and 50,000 ft. The connector provides at least 100 MΩ of insulation resistance. For contact ... November 2010 [Components] 50- And 75- Ohm RG Coaxial Cable Saves On Weight To serve aircraft communications and navigation systems, a lighter-weight RG coaxial cable provides weight savings without compromising performance. When compared to standard RG coaxial cables, these lighter cables reduce operating costs because they are as much as 20 percent lighter with a 15 percent smaller diameter. Yet they still meet the stringent electrical and mechanical requirements of MIL-T- 81790 and EN 3475-503. The cables, which are ... November 2010 [Components] Cable-Family Upgrade Covers DC To 40 GHz Even after extensive flexing and thermal cycling, the UTiFLEX cables supposedly exhibit insertion loss of 0.11 dB/ft. at 1 GHz and 0.68 dB/ft. at 40 GHz. The 50-Ω UFC cables are double shielded, guaranteeing at least -90 dB RF shielding. They have a center-conductor diameter of 0.0403 in. with a dielectric diameter of 0.109 in. The diameter of the inner shield is 0.117 in. while the jacket diameter is 0.142 (±0.005) in. The cable’s unique construction incorporates an... September 2010 [Test & Measurement] Study Evaluates Measurement Uncertainty In VNAs And TDRs In a recent study, measurement uncertainty was compared between vector network analyzers (VNAs) and time-domain reflectometers (TDRs). While both instruments are able to analyze time- or frequency-domain data to accelerate product development cycles, W. L. Gore & Associates Inc. (Gore) designed an experiment to determine if both instruments possess similar levels of measurement precision. Using a variety of manufacturers’ cable assemblies with a... September 2010 [Components] PAs Provide WCDMA Power To +24.5 dBm Femtocells promise to solve the problem of weak wireless broadband signals in homes and offices by allowing mobile devices to connect to their carrier’s network through a high-speed Internet backhaul link. To serve such emerging applications, the AWB7127 and AWB7123 power amplifiers (PAs) have been designed for use in femtocells, picocells, and in-home customer premises equipment (CPE). These PAs support complex modulation schemes, such as those used in... September 2010 [Components] Dual-Output VCOs Tune To 8.9 GHz The EWV0800YF is a series of voltage-controlled oscillators (VCOs) that sport dual outputs with total frequency coverage of 7.3 to 8.9 GHz and 3.65 to 4.45 GHz. Based on 2-µm indium-gallium-phosphide (InGaP)/gallium-arsenide (GaAs) heterojunction-bipolar-transistor (HBT) technology, the monolithic-microwave-integrated-circuit (MMIC) oscillators feature on-board, divide-by-two prescalers to create a second tuned output range at one-half the frequency of the fundamental ...  prev. page
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