Product Technology

 293 results found for Product Technology, displaying items 1 - 20

August 2010   [Test & Measurement]
Portable VNAs Tune Filters In The Field
Vector network analyzers (VNAs) were once found only in a facility’s equipment racks. But compact instruments like the VNA Master line from Anritsu Co. (www.us.anritsu.com) pack two-port VNA measurement capability into an enclosure about the size of a notepad computer, with equal portability. These portable test tools allow engineers to tune filters and phase-match cables on site and in the field. And with the latest editions of VNA Masters offering high-frequency...  — Jack Browne

August 2010   [Test & Measurement]
The New VNA Masters At A Glance
Portable instrumentation used to imply a digital multimeter (DMM) or some other fairly simple measurement tool. But the latest family of VNA Master portable VNAs redefine the amount of measurement capability possiible from a handheld package. Ideal for cable and antenna measurements in the field, the VNA Master instruments include models MS2026B with a frequency range of 5 kHz to 6 GHz and model MS2028B, with coverage of 5 kHz to 20 GHz. And, although...  — Jack Browne

August 2010   [Components]
MM-Wave Components Offer Wide Bandwidths
Bandwidth is available at higher frequencies, making millimeter-wave communications links attractive at 60 GHz and above. Unfortunately, the costs associated with manufacturing and testing hardware rises with frequency, presenting genuine challenges to the companies involved in millimeter-wave markets. Although customers have been somewhat hesitant to embrace the bands through 95 GHz licensed by the United States Federal Communications Commission (...  — Jack Browne

August 2010   [Components]
Module Synthesizes 29 To 3840 MHz
Modular frequency synthesizers are useful in numerous applications requiring a stable frequency source. Compact units are available from a number of suppliers, with one relative newcomer, HGC Microwave, offering a miniature synthesizer module with broad bandwidth of 29 to 3840 MHz and excellent spectral purity in a housing measuring only 5.39 x 6.48 x 0.67 in. with SMA female connectors. ...  — Jack Browne

August 2010   [Test & Measurement]
Scopes Surface From New Source
Oscilloscopes are those workhorse instruments that belong on every test bench, next to a digital multimeter. They are invaluable, and models suited for microwave work have been available for some time from trusted names in test. But Rohde & Schwarz was not one of them, until now. The supplier has finally entered the digital scope market with its R&S RTO series with bandwidths to 2 GHz and its R&S RTM series with bandwidths to 500 MHz. ...  — Jack Browne

August 2010   [Test & Measurement]
Cross Correlation Cuts Phase Noise
Phase noise is a key specification for many RF and microwave systems, although measuring it can often be problematic. However, the innovative Dual Channel Phase Noise Test System (DCNTS) from NoiseXT is a two-channel amplitude and phase noise analyzer that can measure absolute phase noise through 50 GHz and residual phase noise to 18 GHz. It employs a dual-demodulator architecture that allows the use...  — Jack Browne

July 2010   [Test & Measurement]
Measuring MIMO Performance Levels
Communications systems designers have reached for a variety of different techniques to squeeze maximum capacity from minimum bandwidths. One of these approaches involves the use of multiple signals as part of a multiple-input, multiple- output (MIMO) antenna configuration. MIMO techniques are used in a number of newer wireless standards, including in IEEE 802.11n wireless local area networks (WLANs), IEEE 802.16-2004 Fixed WiMAX, IEEE 802.16e Mobile...  — Jack Browne

July 2010   [Devices & ICs]
Transceiver IC Tackles 3G, LTE
Mobile handsets must pack a great deal of functionality within a compact package to even approach modern customers’ expectations. In order to handle different bands and operating modes, RF front-end modules (FEMs) typically employ low-noise amplifiers (LNAs) and filters for each receiver band, and power amplifiers (PAs) and filters for each transmit band. But Fujitsu Microelectronics America has...  — Jack Browne

June 2010   [Components]
RF/Microwave Filters Fit Surface-Mount Needs
Filters are getting smaller, with RF and microwave designers having a greater number of choices in surface-mount packages. These miniature filters leverage a variety of technologies, including traditional inductive-capacitive (LC), ceramic, surface-acoustic-wave (SAW), bulkacoustic- wave (BAW), film-bulk-acoustic- resonator (FBAR), microelectromechanical- systems (MEMS), and even monolithic-microwave-integratedcircuit (MMIC) approaches. ...  — Jack Browne

June 2010   [Components]
PIN Diode Modules Add Delays To 3 GHz
Adding delay to a signal is instrumental in some applications, such as in signal propagation simulators and radar signal simulators. Delays can be implemented in a number of ways, including the use of precise lengths of semirigid coaxial cable. Colby Instruments, known for its trombone tuner for broadband delays (see Defense Electronics, p. S37), also offers compact delay modules based on...  — Jack Browne

May 2010   [Devices & ICs]
Healthcare Segment Offers Plentiful RF Prospects
For years, microwave companies have been selling components for medical imaging applications, such as magnetic resonance imaging (MRI) systems. While imaging continues to offer viable opportunities, many additional medical application areas are emerging for wireless microwave and RF technologies. Remote monitoring, for example, allows patients to stay at home while health status reports, such as blood pressure and pulse rate, are sent wirelessly to...  — Nancy Friedrich

May 2010   [Components]
Small Antennas Are Big On Efficiency
Antennas must be large to have gain and high efficiency. At least that has long been the traditional view of antenna designers, until the wireless industry spurred interest in electrically small (ELS) antennas in the early 1990s. If small efficiency antennas could be developed for handsets and other wireless applications, fewer burdens would be placed on active components within the system, such as amplifiers. Well, it is time to change the traditional...  — Jack Browne

May 2010   [Test & Measurement]
High-Speed Scopes Race To 32 GHz
Oscilloscopes are versatile, workhorse test instruments, ideal for high-speed circuit characterization. But for microwave measurements, they have rarely been considered on par with a vector network analyzer (VNA).With the introduction of the Infiniium 90000 X-Series of digital oscilloscopes from Agilent Technologies (www.agilent.com), that thinking may change. These high-performance oscilloscopes come in 10 models with real-time bandwidths ranging...  — Jack Browne

May 2010   [Test & Measurement]
Reference Sources Reduce Size, Noise
Reference signal sources set the spectral standards for a wide range of phase-lockedloop (PLL) applications, from clock translators in measurement instruments to ground-based and airborne radar systems. Traditional references sources, such as crystal, ceramic, or surfaceacoustic- wave (SAW) oscillators, are based on high-quality-factor (high-Q) resonators. They are generally limited to fundamental frequencies of about 1 GHz and must be multiplied to...  — Ulrich L. Rohde , et al.

April 2010   [Components]
Cables And Connectors Link Microwave Systems
Cables and connectors are usually only noticed when they fail. At their best, they can add nothing electrically to a system or a circuit but, at their worst, they can degrade amplitude and phase performance. Recent developments in these interconnection components have been aimed at making them as electrically “invisible” as possible, with low loss and the best possible impedance match to a 50-Ohm system. For example, coaxial cable assembly ...  — Jack Browne

April 2010   [Computer-Aided Engineering]
Math/EM Software Solves Circuit Problems
Software simulation has largely taken the place of “trial-and-error” prototypes in fine-tuning high-frequency designs. Two of the types of software tools often used by RF and microwave engineers are mathematical and electromagnetic (EM) field simulators. Although math tools can be applied for analysis in almost all scientific fields, they can also be run with electrical engineering modules. And EM simulators have leveraged the increased computing power...  — Jack Browne

April 2010   [Components]
Tunable MMIC Filters Span 1.0 To 7.6 GHz
Tunable microwave filters offer a great deal of versatility. And when they are based on monolithicmicrowave- integratedcircuit (MMIC) technology and housed within a 5 x 5 mm surface-mount package, they can fit almost any application. New families of varactor-tuned MMIC lowpass and bandpass filters from Hittite Microwave Corp. () provide this flexibility with high stability and fast tuning speeds over ...  — Jack Browne

March 2010   [Materials]
Suppliers Enhance Substrate Performance
Electronic substrate materials are like the foundation in a building: rarely noticed, but critical to the overall architecture. For RF/microwave circuits, the printed-circuitboard (PCB) substrate or laminate material is an essential building block that must be stable over time and temperature with low signal losses at microwave frequencies. Although PTFE has long been a substrate of choice at microwave frequencies, pure PTFE tends to suffer...  — Jack Browne

March 2010   [Components]
Synthesizers Shave Size, Not Performance
Size, speed, and power savings are key drivers for frequency synthesizers. A sign of the current trend in frequency synthesizers is the growing number of integrated miniature phase-lock-loop (PLL)/voltage-controlled- oscillator (VCO) combinations. What were once multiple components on a printed-circuit board (PCB) are now in a single surface-mount device. Requirements for frequency synthesizers in commercial and industrial applications are...  — Jack Browne

February 2010   [Devices & ICs]
Properly Packaging RF Semiconductors
Electronic packaging usually serves to protect what lies within. For RF and microwave devices, however, an ideal package must provide a physical barrier while appearing electrically invisible. And with the trend for increasing levels of integration at higher frequencies (see Wireless Demands Focus Designers On Integration), packages must often take on the electrical characteristics...  — Jack Browne





prev. page     [1] 2 3 4 5 6 7 8 9 10 11 12 13 14 15     next page