IN MY OPINION

Time to Reevaluate RF and Microwave Power Application Development

By Dan Viza, RF and Emerging Markets Manager Freescale Semiconductor

The methods for evaluating RF power components for use in RF and microwave applications have seen relatively little change over the years in spite of the expanding universe of RF applications.
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MILITARY MICROWAVE DIGEST


MMD March 2014
New Military Microwave Digest

ON THE MARKET


Band Reject Filter Series
Higher frequency band reject (notch) filters are designed to operate over the frequency range of .01 to 28 GHz. These filters are characterized by having the reverse properties of band pass filters and are offered in multiple topologies. Available in compact sizes.
RLC Electronics


SP6T RF Switch
JSW6-33DR+ is a medium power reflective SP6T RF switch, with reflective short on output ports in the off condition. Made using Silicon-on-Insulator process, it has very high IP3, a built-in CMOS driver and negative voltage generator.
Mini-Circuits


Group Delay Equalized Bandpass Filter
Part number 2903 is a group delayed equalized elliptic type bandpass filter that has a typical 1 dB bandwidth of 94 MHz and a typical 60 dB bandwidth of 171 MHz. Insertion loss is <2 dB and group delay variation from 110 to 170 MHz is <3nsec.
KR Electronics


Absorptive Low Pass Filter
Model AF9350 is a UHF, low pass filter that covers the 10 to 500 MHz band and has an average power rating of 400W CW. It incurs a rejection of 45 dB minimum at the 750 to 3000 MHz band, and power rating of 25W CW from 501 to 5000 MHz.
Werlatone


LTE Band 14 Ceramic Duplexer
This high performance LTE ceramic duplexer was designed and built for use in public safety communication and commercial cellular applications. It operates in Band 14 and offers low insertion loss and high isolation to enable clear communications in the LTE network.
Networks International

See all products in this issue


 
August 2014

FCC v. DOT

Imagine this: you’ve just taken off on a transcontinental flight, stuck in a plane for six hours with about 200 other passengers, cramped, hungry, and cranky – and then everyone pulls out their cellphone so they can share their status with the outside world. Vocally.

Sounds like a serving of fresh hell, right? Absolutely. According to The Wall Street Journal (Aug. 3), the FCC sought to have “technical rules barring in-flight cellphone use that have been in place for more than two decades” overturned last December, claiming that interference with ground-based cellular networks was “believed” to be a non-issue.

Enter the DOT (Department of Transportation), which will be presenting its own views on this matter, to which it chiefly objects because of the annoyance factor presented by passengers talking on their cellphones. Texting and data use? Not so much (certain airlines do have Wi-Fi available, after all).

Here’s the best part of this whole brouhaha: DOT trumps FCC. If the DOT rules against permitting in-flight cellphone use, there’s not a thing the FCC can do. And think about it: which airline would you prefer to patronize, one that allows incessant, annoying chattering on cellphones or one that does not? In a world where many frequent travelers invest money in noise-blocking headphones, myself included, I think the answer is pretty obvious.

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FROM WHERE WE SIT

Uncertain Times for DefenseIn Defense of DARPA; Lamenting Bell Labs
By Barry Manz

A federal agency like DARPA is a sitting duck for politicians and assorted other critics. It has come up with some truly bizarre programs over years that ultimately either delivered no tangible results, were canceled before they could cause any damage, or attempted to answer questions that nobody was asking or needed answers to. Read More...


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