RF

Filter measurements with RF noise source

I got my BG7TBL RF noise source to make some RF measurements. To make those measurements, I needed some instructions how to make them. I first started with filter measurements because I could make them with the devices I have. Two good tutorials for doing measurement are Measuring Filters and VSWR With RTL-SDR and RTL-SDR

BG7TBL RF noise source

I have played with software defined radio using cheap DVB-T stick for some time. Receiving radio transmissions is interesting, but it works also for other applications. By reading RTL-SDR Tutorial: Measuring filter characteristics and antenna VSWR with an RTL-SDR and noise source article I understood that I could use my RTL-SDR stick for many RF

IoT: The Interference of Things | EDN

http://www.edn.com/electronics-blogs/the-emc-blog/4458714/IoT–The-Interference-of-Things?utm_content=bufferae2f7&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer The writer of this article declares that IoT stands for “Interference of Things.” Anything else you may have heard is just marketing hype. Relatively few connected gadgets will use wireline communications, the bulk of these devices will connect wirelessly over Bluetooth, Wi-Fi, cellular or something else. Some IoT devices will be designed to limit

DC-4.0GHz RF Fixed Attenuator

RF attenuators are a universal building block within the RF design arena. I neeeded some RF attenuators for my electronics lab. I found this cheap product  DC-4.0GHz RF Fixed Attenuator from Banggood. They seemed to have pretty good specfications and features considering that the price is just slightly over 7 Euros for three attenuators: Frequency

What PCB material do I need to use for RF? | EDN

http://www.edn.com/design/analog/4398951/What-PCB-material-do-I-need-to-use-for-RF-?utm_content=buffer44212&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer Is plain old FR-4 (also known as “Glass Epoxy”) PCB material suitable for use in RF designs? This question comes up time and again. Many say no, fewer say yes – who’s right? This article is from few years back, but still is valid. Besides RF applications you need to consider material with very

Shields are your friend, except when… | EDN

http://www.edn.com/electronics-blogs/the-practicing-instrumentation-engineer/4418080/Shields-are-your-friend–except-when-?utm_content=buffer6cce1&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer Engineers just love to put shields on circuits, mostly as a defensive measure against signals on the outside getting into and disturbing our circuits, but they also keep signals inside from getting out and this really makes the folks responsible for EMI compliance happy. So what could go wrong? Well 10 years ago, not

How to pre-test your product’s antenna | EDN

http://www.edn.com/electronics-blogs/5g-waves/4458585/How-to-pre-test-your-product-s-antenna?utm_content=bufferf9cb7&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer Your wireless product’s end-to-end success dictates that your customers will rely on your antennas to perform well in their system. Most hardware and software is thoughtfully tested before sale or deployment, but why are so many antennas ignored? There is no reason to defer or ignore your antenna evaluation; help is available. This article

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.