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2.550 GHz is easy to work with and works well trough skin. I'd suggest looking around on NCBI as well.

So I recently picked up 40 of 10.525 GHz Microwave RADAR transmitters: I opened up one out of curiosity and had something like this (image attached) . I noticed some parts of the PCB aren't even connected to anything. How do the different shapes and sizes of the PCB interact with each-other...

I noticed HF radio waves travel farther and easier when the sun is out rather then during the night. Why?

I had an idea of building an FM receiver that is powered from the electromagnetic fields generated by power-lines. My question is , how can I make the electromagnetic field receiving antenna? Will a simple copper coil work? If so, can the same coil be used as the RF antenna or will that have to...

I know the CMOS battery keeps the time and BIOS settings , but what is powered by the batter to keep time? A crystal oscillator? And why is it so crucial to keep time on a regular desktop computer?

Can't multiple different cell towers that close to each other cause interference? Thanks lol

If Cellular network towers are supposedly divided in cells , like this image , then why do we loose connection even when outdoors and not inside or near any buildings/cars. Also why is it common to see more than 1 cell tower near each other?

OpenCV is always an attention grabber, generally anything involving AI.

Probably an unanswered question , just wondering what people have to say.

Why do GPS need a cesium clock accurate to 10ns? Is this strictly for time keeping or is there some synchronization between satellites?

How exactly do the elements "connect" to each other to make an antenna directional? I see some Yagi's have a reflector but most do not.

Hi , I am trying to extract the binary bitstream from QPSK using MATLAB. Will something like Frames = reshape(B,[],N) work? If not, can someone point me in another direction?

This website has some great Ti calc programs https://tiplanet.org/forum/portal.php

Yup , found this one http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.29.5395&rep=rep1&type=pdf

So I am planning on launching a Satellite to promote the Dogecoin cryptocurrency. One of the main points is printing/painting (Or whatever) the logo on the side of a metal panel. How can I make it so it doesn't melt off or turn white from radiation so quickly?

I lined the inside and outside of the horn with Microwave paint , seems to work well enough for my use,

I saw a post where someone was granted access to a 1.5 Tesla MRI. After some research I discovered a 3 Tesla MRI. How strong is this magnet?

I do not have a license but I am doing this in a controlled environment. I have not detected microwaves outside of the room I am testing in.,

Yeah I put the tape after to try to fix it. I will try brass with solder and thinner walls and let you know how it goes. Thanks.

There is no coax feedline as this is for an electronic transmitter using gunn diodes. I generated the horn measurements from a tool that used to be on this website : http://67.225.133.110/cgi-sys/defaultwebpage.cgi

This is S-Band, less than 1.5 W. The thick walls were meant to try to prevent microwave from leaking , which as you can see did not work.

So I printed this antenna with some conductive filament , however the microwaves seems to be going between the layers of the plastic. I surrounded it with Aluminum and still leaking, what can I do to fix it? Can conductive silver paint work?

I've seen the SpaceX fail videos, even when they tip over on water the rockets still explode. Why?

Reading: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3597338/ However I don't understand what a useful application for this is? can someone explain?

Thank you! Finally something that made sense

Basically what I understand is that it is a method to find different parts of a continuous signal.

What are Fourier Series in layman's terms ?

Working on some microwave stuff, read about this but can't understand the explanations online.

Well exactly what I mean, at -30inHg they just powered off and would not reboot

Arduino - https://www.arduino.cc/en/uploads/Main/arduino-uno-schematic.pdf rPi2 - https://www.raspberrypi.org/app/uploads/2012/04/Raspberry-Pi-Schematics-R1.0.pdf

I haven't tried measure that yet, but the power supply is not the issue

Yes, but those seem fine, were not bloated and no signs of leakage.

I was trying to log data inside a vacuum chamber, tried an arduino and a rasperry pi. When reaching -30inHg the devices just stopped working, they powered off, no data in or out and would not work ever again. Why? And no, they did not overheat.

Thanks for the explanation, Just getting started with learning antenna theory.

This sire might be more what you're looking for: http://www.chemspider.com/

I use and love Pubchem which branches off NCBI if I remember correctly. https://pubchem.ncbi.nlm.nih.gov/ https://www.ncbi.nlm.nih.gov/

What I understand about harmonics, is when something is transmitted at high power, the antenna resonates on other frequencies besides the desired one. But Why?

Interesting, Will try that, Do you know any good Encryption/Cipher analyzer software for Windows?

Hi, I am trying to decrypt something in a .txt file as a challenge from a friend, the file contains: pÿd“ÙÃÊÌßéh'rv‹"^÷ù O˜w؉D•ÍúúYíY’ ∞¶iÀªÆzI¥r=«Å∑F¸¡„;≥ûü¸ã7∂.ˆ– ã<¿µD~’ÅsG›îwA_4Gå#›¥’6ª˝_ÎaÍÑjù]ÚU3Y{äF-Ê#i 33(›öR `?™|¸ ®flîè+zÂ√œ/fiãìR˛˙˚∂ZëìƺΩÒ†»˘∂®∑‘¬z vóR◊r∂Øûp)E...

Rock* lol

No, some of them only accept pay-pal or credit card which links back to your name. Most VPN's like Norton keep logs.

I use and love ExpressVPN, you can pay with bitcoin for almost 100% anonymous purchases, they keep no logs, have an internet kill switch.

Wouldn't the chain easily get caught on a rock or something? And how does metal provide more traction than rubber wheels?

I get how analog ones with knobs tune by physically changing length of elements to match the frequency, but what about the ones that just have a screen and you type in what frequency you want?

Yes, the door would theoretically be held open mechanically.

Is there a reaction of which the product is the catalyst for that same reaction?

What would happen if a car is driving down a highway at 80Mph and one of the doors is fully opened. Will it make a big change and make it slow down or start turning?