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“Be Very Careful”
By Tom Kurian, President & CEO, Renaissance Electronics Corp. |
“Be very careful” — a mother’s passing comment to her kids as they head outside. The words describe a way of living that is precise, accurate, and deliberate. It involves both forethought and a heightened sense of awareness. I wrote this to build awareness in companies involved in manufacturing and trading products for defense and Sat-Com programs.
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 Another Sad Moment For the FCC
By Barry Manz
A significant number of rooftop antenna sites owned primarily by wireless carriers exceed FCC public and occupational exposure limits, make it impossible for workers to avoid standing in front of antennas, and are inadequately posted with warnings and barriers. Read More...
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 High Power Duplexers and Triplexers
A new line of high power duplexers and triplexers designed for 4G LTE build-out has been released. It includes the Model FD2001 DIN-R Duplexer, Model FT2001 DIN-R Triplexer, and Model FT2001(D) DIN-R Dual Triplexer.
Trilithic RF & Microwave
 Versatile New LNAs
Two packaged low noise amplifier (LNA) gain blocks deliver cost-effective high performance over very broad bandwidths of 50 MHz to 4 GHz. They combine very high linearity with very low noise figures, making them ideal for high-performance wireless infrastructure.
Triquint Semiconductor
 Precision Coaxial Connectors Precision Coaxial Connectors
A new line of precision coaxial connectors for semi-rigid and flexible cables is now available. Interfaces include Type N, Type N Right Angle, SMA and TNC connectors that provide excellent VSWR from DC to 18 GHz. Stainless steel passivated construction.
Vida RF
 Modular WLAN 802.11ac Test System
A new test system based on the company’s PXI 3000 Series modular instrumentation has been designed to offer measurements over a 160 MHz bandwidth at operating frequencies up to 6 GHz. It is particularly suited for making R&D, design verification, and production measurements on WLAN devices based on the IEEE 802.11ac standard.
Aeroflex Limited
 Signal Analyzer Frequency Options
Two new frequency options for the N9000A CXA X-Series signal analyzers provide a low-cost solution for essential microwave signal characterization up to 13.6 and 26.5 GHz. Features include quick measurement of spurs and harmonics due to the CXA’s speed and DANL performance.
Agilent Technologies
 Hand-Flex™ Coaxial Cable
The 141-20SM+ Hand-Flex coaxial cable is ideal for interconnection of coaxial components or sub-systems. The construction includes a silver-plated copper clad steel center conductor which maintains the shape after bending. Frequency coverage is DC to 18 GHz.
Mini-Circuits
See all products in this issue
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| Researcher Says RF Turning India Into “Open Microwave” |
The Times of India has quoted Girish Kumar, a researcher and faculty member at IIT Bombay, as saying that “the mobile towers in India are turning the country into an open microwave." His remarks were made at the national seminar on mobile phone and tower radiation-risks and remedies presented by the Government Polytechnic Bicholim, Goa Chamber of Commerce and Industry, and department of science, technology and environment.
Kumar who has conducted studies on mobile radiation said, "With 1 W power, temperatures increase by 1o C in 500 seconds (9 minutes)”. He noted that mobile companies were choosing to install higher-power transmitters to cut costs but were compromising on public safety. Citing a case study in which six residents of a high-rise Mumbai building facing a mobile tower were afflicted with cancer, he noted a rise in cancer cases among residents living near wireless system towers. "Those living in a 50 to 300 m radius face a high risk -- much worse than smoking -- as you cannot see or smell radiation," he said, while adding that "you cannot have coincidences everywhere".
"Biological effects include drying of fluids around the eyes, brain joints, heart, and abdomen leading to sleep disruption, headaches, lack of concentration and memory loss caused by changes in the electrical activity of the brain. Prolonged exposure to mobile radiation increases chances of cancer by 200 to 400% over 8 to 10 years," Kumar stressed. It can also lead to miscarriages as it affects the amniotic fluids, he added. Citing examples of farmhouses, Kumar also observed that mobile tower radiation was affecting the environment and fruit-bearing trees as well as birds.
Kumar said the Specific Absorption Rate (SAR) in India has been fixed at a much higher level than it should be to benefit telecom operators who contribute 30% of India's GDP. He felt part of the solution lay in reducing the transmitted power from towers which would necessitate setting up of additional towers at a much higher cost.
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SEARCH MPD’S EXTENSIVE DATABASE! |
MILITARY MICROWAVE DIGEST |
•Directivity and VSWR Measurements
Return loss and VSWR measurements are complicated by the finite performance of the directional device used to measure the reflected power. The only accurate and convenient way to make return loss measurements is with a well matched high directivity directional coupler or bridge.
Marki Microwave
•Switch Solutions for Systems with Low PIM Requirements
Dow-Key Microwave has invested in R&D for new RF switch products designed specifically to reduce intermodulation (IM) in coaxial switches.
Dow-Key Microwave
• How to Specify RF and Microwave Filters
Covers cavity, ceramic, LC, crystal and helical filters.
Anatech Electronics
• Mounting Considerations for Medium Power Surface-Mount RF Devices
Covers all factors that must be considered when mounting SMT devices.
TriQuint Semiconductor
• Biasing MMIC Amplifiers
How to bias MMICs along with theory and techniques.
Mini-Circuits |
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