RF

Banana connector types

https://en.m.wikipedia.org/wiki/Banana_connector A banana connector is a single-wire (one conductor) electrical connector used for joining wires to equipment. The term 4 mm connector is also used, especially in Europe,because the pin’s diameter is nominally 4 millimetres (0.16 in).The pin has one or more lengthwise springs that bulge outwards slightly, giving the appearance of a banana. The original plug consists of a cylindrical metal pin about 20 millimetres (0.79 in) long.However other

AES-256 keys sniffed in seconds using €200 of kit a few inches away • The Register

https://www.theregister.co.uk/2017/06/23/aes_256_cracked_50_seconds_200_kit/ Side-channel attacks that monitor a computer’s electromagnetic output to snaffle passwords are nothing new. They usually require direct access to the target system and a lot of expensive machinery – but no longer. Researchers at Fox‑IT have managed to wirelessly extract secret AES-256 encryption keys from a distance of one metre (3.3 feet) –

websdr.org

http://websdr.org/ A WebSDR is a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously. SDR technology makes it possible that all listeners tune independently, and thus listen to differentsignals;  this is in contrast to the many classical receivers that are already available via the internet.

Researchers train drones to use Wi-Fi to look through walls | TechCrunch

https://techcrunch.com/2017/06/19/researchers-train-drones-to-use-wi-fi-to-look-through-walls/?ncid=rss&utm_source=tcfbpage&utm_medium=feed&utm_campaign=Feed%3A+Techcrunch+%28TechCrunch%29&utm_content=FaceBook&sr_share=facebook This is quite interesting -or frightening – WiFi radar application. A new system by University of California, Santa Barbara researchers Yasamin Mostofi and Chitra R. Karanam uses two drones, a massive Wi-Fi antenna, and a little interpolation to literally see through solid walls. One drone blasts Wi-Fi through the structure and another picks up the signal.

IMS 2017: RF/microwave test equipment, part 1 | EDN

http://www.edn.com/electronics-blogs/rowe-s-and-columns/4458491/IMS-2017–RF-microwave-test-equipment–part-1?utm_content=buffer9eaa6&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer The IEEE International Microwave Symposium is in Honolulu, Hawaii in 2017. Here is some of the new test equipment seen by EDN staff.

We may have accidentally formed a protective bubble around Earth | Popular Science

http://www.popsci.com/radio-wave-shield-space-weather?src=SOC&dom=fb This is interesting if true. This is not the first I have heard EM signals from earth affecting ionosphere.  When the Navy wants to send a message to an underwater submarine, it sometimes uses very low frequency (VLF) radio waves. Some end up in space and according to a new report, they may be forming a

HB100 microwave radar to Arduino

A Doppler radar is a specialized radar that uses the Doppler effect to produce velocity data about objects at a distance. It does this by bouncing a microwave signal off a desired target and analyzing how the object’s motion has altered the frequency of the returned signal. Doppler radar technology used to be expensive, but

Struggling towards 5G | EDN

http://www.edn.com/electronics-blogs/5g-waves/4458307/The-struggle-to-5G?utm_content=bufferf9a50&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer  5G is developing so fast it’s hard to get a handle on it, whether you’re responsible for building 5G systems or writing about them. Part of the problem is that 5G is not one proposed standard, it’s a growing set of them.  Every new proposal of this sort complicates the ability of standards bodies

IoTuesday: Maximize Your WiFi!

https://www.sparkfun.com/news/2363 Interesting looking project: mount the antenna and ESP8266 Thing Dev Board onto a pan/tilt bracket with some servos. The ESP8266 code was updated to connect to a WiFi access point (AP) and begin sweeping up and down (about 70°) and left to right (about 180°). At 5° increments, the ESP8266 would take an RSSI reading. Finally the antenna automatically returns