RF devices :: Topics :: RadioComms

Multipath fading effects on short-range links
This article introduces multipath fading and describes the results of experiments conducted by Alciom on short-range 2.4 GHz RF links in indoor environments.
Keeping the mind up with IP technology - Part 2
Traditional land-mobile radio networks have not seen the scale of development and indeed opportunities experienced in other technologies. Radio-over-internet protocol (RoIP) will change that.
Keeping the mind up with IP technology - Part 1
The internet changed the world. We can find information, gain visibility and communicate - basically anytime, anywhere. Not unlike why our predecessors built radio networks in the first place.
Challenges of handheld RF test equipment
In these increasingly challenging times where speed and reliability are virtually everything, radio communication field technicians need portable test tools they can trust.

Opening up the last part of the spectrum
European research on the last, hidden part of the electromagnetic spectrum could enable applications that include quality control in semiconductor and pharmaceutical factories, as well as smart security scanners.
Is RF a danger to health? – Part Two
This is the second part of a multi-part series looking at various RF effects including sperm count, interruption of sleep patterns and brain tumours. Researchers at the Cleveland Clinic in America studied 361 men at their infertility clinic to investigate the effect of mobile phone use on semen quality.
Text message could prevents heart attack
Wearing your heart on your sleeve has long been thought of as something for young fools in love, but new research has shown it may save your life
Is RF a danger to health? - Part one
Over the years there have been ongoing concerns, scare stories and many reports on the possible harming effects of RF emissions, particularly in relation to mobile phones

Andrew Solutions Network Applications GeoLENs indoor location system
The GeoLENs indoor location system makes it easier for emergency services personnel to locate mobile phone users inside large buildings, potentially saving lives and reducing risk of harm to rescuers.
Tallysman Wireless range added to Step Global RF/GNSS range
The Tallysman Wireless range has been added to the global navigation satellite systems (GNSS) portfolio of Step Global.
ASD Thincore range of waveguide isolators and circulators
ASD has introduced the Thincore range of waveguide isolators and circulators designed for point-to-point base station application with ultra compact size and reliable performance.
Mesh networking
Digi International has introduced DigiMesh on 900 MHz and 2.4 GHz XBee embedded RF modules.
Radio signal enhancer
The Node A RF Enhancer supports a combination of narrowband channels and individual band segments in one unit. This includes the 2G, 2.5G, 3G, 4G cellular, iDEN, TETRA, VHF, 700 MHz and other bands.
RF power detector
A monolithic broadband high-performance logarithmic RF power detector from Linear Technology provides accurate RF power measurement over a wide frequency range covering the 800-900 MHz and the 1.7 to 2.2 GHz mobile bands, as well as the 2.6 and 3.5 GHz WiMAX bands.
FM transmitter module
The TX2S, from Radiometrix, is a miniature PCB mounting, UHF radio transmitter for the 433.92 MHz (Britain) or 434.42 MHz (European) radio bands.
ISM band evaluation kit
Cyan has launched its RF-Solved evaluation kit that contains everything needed to create a basic two-node network, enabling examination of the features and capabilities of a Cy-Net ISM band solution.
Ferrite devices
Radio Frequency Systems has unveiled a suite of ferrite isolators and circulators.
Expanded line card
Richardson Electronics has released the 2008 line card for its RF, wireless and power conversion division, which designs and distributes components, modules and assemblies used in RF and wireless infrastructure, networks, digital broadcasting, defence and power conversion.
RF amplifier
The LA500-2500 is a wide band, RF amplifier that operates from 24 VDC and is designed for continuous use.
RF analyser, integrated handheld instrument
Agilent Technologies has introduced the FieldFox handheld RF analyser — the integrated handheld instrument for wireless network installation and maintenance.
RF/DC crossover
Florida RF labs has released the RF/RF and RF/DC crossover with an integrated 2 W attenuator.
VC oscillator
Crystek’s CVCO55CC-1930-2110 VCO operates from 1930 to 2110 MHz with a control voltage range of 0.5-18. The VCO features a typical phase noise of -110 dBc/Hz at 10 kHz offset and has good linearity.
Integrated RF shielding
RF Micro Devices has introduced its MicroShield integrated RF shielding.
RF modules
Nordic Semiconductor ASA says designers without specialist RF knowledge can now build an ultra-low power ISM-band wireless link into a product or application within hours by using pre-approved modules developed by RF Digital.
USB RF/Microwave Power Sensors up to 24 GHz
Agilent's new U2000 Series USB power sensors measure true average power from RF and microwave devices and make set-up fast and simple by providing plug-and-play USB connectivity and by eliminating the need for a separate power meter.
Bubbler depth measurement
The Bubbler is a radio licence-exempt wireless liquid level monitoring system for up to four remote dams/bores/rivers/tanks at separate locations within a 5 km range.
Antenna design
Agilent has released its antenna modelling design system, a 3D tool based on electromagnetic technology.
Communications software
The 8920 RF comms test set software adds PC connectivity by providing screen capture, cable fault location and many other capabilities essential for the installation and maintenance of two-way radio systems.
Bridge routers
Wave1's latest 5.8 GHz wireless bridge router with data rates up to 108 Mbps has data throughput via full/half duplex 10/100Base-T, operating in the class licence 5.8 GHz band.
Crossband coupler
RFI has released a crossband coupler for 118-145/225-400 MHz.
Remote monitoring
RFS has released a suite that allows remote control and monitoring of tower-top RF components.
Ceramic filters
MtronPTI has expanded its product portfolio to include ceramic filters that feature devices with frequencies from 300 MHz to 6 GHz with a 1-40% bandwidth.
VC oscillators
Hittite has released a family of GaAs InGaP HBT MMIC VCOs with half frequency and divide-by-four outputs providing continuous frequency coverage from 8.45 to 13.9 GHz.
Broadband, coaxial solid-state PIN diode switches
Agilent has introduced a family of coaxial solid-state PIN diode switches with an operating frequency range from 100 MHz up to 18 GHz.

GNSS range
Step Global has added the Tallysman Wireless products to its range of GNSS (global navigation satellite systems).
Frequency plan for comment
The AMCA has released a draft of a new Australian Radiofrequency Spectrum Plan for public comment. When completed, the plan is intended to replace the current Spectrum Plan developed in January 2005.
Technology guidelines
The Australian Communications and Media Authority (ACMA) has released guidelines on how it will handle applications for licences to trial new technologies that make use of spectrum, such as digital broadcasting or wireless internet technologies.
Appointed to global marketing role
Radio Frequency Systems has appointed Eric Mariette as vice-president of global marketing and strategy. He is responsible for ensuring that the company’s portfolio of RF solutions is fully visible to the global wireless sector, and that the company’s expanding solution-set meets the demands of the industry.
RFS earns Huawei supply awards
Huawei has presented two awards to Radio Frequency Systems in recognition of its service and supply record.
Macau casinos adopt wireless services
A recent investment boom in the Chinese city of Macau has seen a number of local and international casino chains open luxurious hotel and casino resorts. These developments incorporate high-rise hotels, gaming floors, shopping arcades, exhibition centres and even indoor sports stadiums.
Second conference on spectrum management
The Australian Communications and Media Authority’s conference on the management of the radiofrequency spectrum, Radcomms08, will be held in Melbourne 30 April to 2 May and offers the opportunity to hear the latest developments in spectrum management.
Shanghai facility to include research and development
RF Micro Devices has announced the addition of a research and development (R&D) centre in the company's Shanghai facility.

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