Microwaves & RF articles from May 2009

Microwaves & RF archives from May 2009

Buckley is named Harris Fellow.(people)(Richard Buckley honored)(Brief article)
May 1, 2009... RICHARD BUCKLEY has been named the 2009 recipient of the Harris Fellow Award, the highest recognition for engineering achievement at Harris Corp. Buckley, a Senior Scientist with the RF Communications division in Rochester, NY, is a 25-year...

Meetings.(education)(Conference news)(Brief article)(Calendar)
May 1, 2009... 2009 National Conference on Microwave and Millimeter Wave in China May 23-26, 2009 (China) Xi'an Qujiang International Conference and Exhibition Center, P. R. China For more information contact: Mr. Wei Zilun Phone: 86-755-83655339 FAX:...

Generate ultra-short pulses at 50 attoseconds and beyond.(R & D roundup)(Brief article)
May 1, 2009... RESEARCHERS ARE INCREASINGLY leveraging ultra-short light pulses in areas as diverse as high small-scale lithography and high-speed switching and communications. In fact, a simple system for attosecond pulse generation using optic devices known...

Sending surface waves along coaxial cables: part 1 of this three-part series introduces the concept of surface waves and high-frequency, low-loss propagation along the surface of a single-conductor or high-impedance coaxial line.(DesignFeature)
May 1, 2009... Coaxial cables had once been thought to support only a single transverse-electromagnetic (TEM) propagation mode. But a solution to the Maxwell-Heaviside equations supports the existence of a propagating transverse-magnetic (TM) surface-wave...

Build LPFs with dot-terminations: high-frequency lowpass filters with flat passband responses ideal for digital signal transmissions can be fabricated withmicrostrip dot-terminations.(DesignFeature)(lowpass filters)
May 1, 2009... Lowpass filters with maximally flat group delay are ideal for digital signal transmission systems, since they allow pulsed signals to rise and fall smoothly and settle rapidly to final values without distortion. Filters such as the...

Eliminate external sources to measure DUT noise.(applicationnotes)(Analog Devices Inc.)(device-under-test)(Brief article)
May 1, 2009... If a device's additive phase-noise contribution is known, engineers can more easily select individual components for their signal chain. They will feel confident that those devices--in aggregate--meet the phase-noise requirements for their...

Agile sources reach 50 GHz: these fast-switching frequency synthesizers deliver excellent spectral purity and flexible sweep functions in a choice of six models with bandwidths as wide as 50 GHz.(AGILE SOURCES)
May 1, 2009... Millimeter-wave test signals are essential for evaluating a wide range of systems and their components, including aerospace, defense, and satellite communications systems. Those test signals should feature low phase noise, minimal harmonics and...

Radios tune at UHF and 1.3 GHz: these compact board-level radios measure just 2 x 2 x 0.3 in. but provide secure line-of-sight communications ranges to 60 miles using encrypted UHF and 1.3-GHz signals.(ProductTechnology)
May 1, 2009... Military electronics systems often require an embedded radio to communicate voice or data to and from the system and a command post. But such radios must be small in size and low in power, especially for portable and tactical systems....

Laser-based system creates fast prototypes: this powerful automated prototyping system uses computer-controlled laser beams to precisely machine a wide range of copper-coated substrate materials in forming prototype circuits.(ProductTechnology)
May 1, 2009... Circuit design and prototyping can be a tedious series of steps, developing layout files, sending them to a fabrication house, and waiting for the return of printed-circuit boards (PCBs) for evaluation. There is a way to eliminate the delays,...

20-W chip attenuator quells levels to 30 dB.(PASSIVE COMPONENTS)
May 1, 2009... A 2010-chip-sized attenuator designated the VGX-2010WA features wraparound terminals for solder or epoxy attachment. These 50-[degrees] attenuators are constructed using thick film on aluminum nitride. Attenuation values to 30 dB are available...

AWS-band diplexer offers 45-dB Tx-Rx isolation.(PASSIVE COMPONENTS)
May 1, 2009... For applications that require a high level of isolation between transmit (Tx) and receive (Rx) paths, this diplexer features a minimum of 45 dB. The device covers the Advanced Wireless Services (AWS) frequency bands from 1710 to 1755 MHz and...

IF amplifier delivers 25 dB gain from 0.1 to 2.6 GHz.(AMPLIFIERS & OSCILLATORS)
May 1, 2009... Aimed at direct-broadcast-satellite (DBS) and very-small-aperture-terminal (VSAT) system designers, the UPC3239TB is a medium-power silicon amplifier with generous broadband gain. The UPC3239TB requires a supply voltage of +3 to +3.6 VDC and...

3.3-V OCXOs serve frequencies to 38.88 MHz.(AMPLIFIERS & OSCILLATORS)
May 1, 2009... Flaunting frequency stability of better than 200 ppb over a temperature range of 0[degrees] to +70[degrees]C, the FC100 series of oven-controlled crystal oscillators (OXCOs) is offered in standard frequencies of 10, 13, 19.2, 19.44, 20, 26, and...

Type N panel receptacles feature single-piece construction.(CABLES & CONNECTORS)
May 1, 2009... Single-piece body construction is among the distinguishing features of a UG-58 A/U Type N panel receptacle. The seamless UG-58s are manufactured using a machine that was custom designed and built for fully automated assembly. Aside from saving...