Radio signals Definition and 22 Threads

Time travel teleportation can be achieved in small scale experiment in millisecond. Using a computer byte in radio signals. I look forward for comments.

Hi! Just in case someone is interested in SETI, I made a video about the most promising radio signals detected so far. Here it is: https://www.youtube...h?v=4MxNEfIfQjI Hope you enjoy it! What is the most promising SETI radio signal for you guys? Do you think we will discover an intelligent...

Homework Statement P.S.: I'm not sure if it is allowed to ask multi-part questions. Two equally old sisters Alice and Barbara leave Earth simultaneously in opposite directions. The following velocities and distances have been measured in the Earth system. Alice travels with a speed of ##v_A =...

Is there a machine that can emit multiple radio waves simultaneously? I am trying to create a demonstration, but it requires multiple radio waves at once and cannot find any machines that can do so.

Homework Statement July 22,2017. Homework Statement Television and radio waves can reflect from nearby mountains or from airplanes. Such relfections can interfere with the direct signal from the station. a. Determine what kind of interference will occur when 75-MHz television signals arrive at...

When antenna receive the radio signal does it reduce the actual radio signal strength or strength indeed depends on the dispersion loss and other dielectric absorption? If antenna doesn’t reduce the radio signal strength(power), how it generates the current in the receiving antenna circuit? How...

I'm pretty darn new to engineering, so I'm just diving in and hoping all goes well. I've got roughly 6 months to finish this project as it's a Christmas gift in the making. My current plan is to carve a large spruce log into the shape of an old cathedral style antique radio, make a cabinet...

I am trying to build my own communication / listening dish, multi frequency antenna, basically my own deep space antenna network. how to get the needed supply for such endeavour? help with any info on this, a new field for me. thanks!

My question is about RF frequency... The RFs are electromegnetics waves...That means they are one type of Light waves... right?? The other question is about perticular frequency of RF signals...When we want to transmit or receive some perticular frequency... we tune our radio at that perticular...

This paper 'Provocative radio transients and base rate bias: a Bayesian argument for conservatism', http://arxiv.org/abs/1211.7338, discusses transient radio signals as possible signs of extraterrestrial intelligence. I knew of the 'WOW' signal, but, was unaware of other similar detection events.

then how can you tune into, say, 101.1 when its not at 101.1 MHz all the time given the frequency change?

The greater the amplitude of a given frequency of light hitting an antenna the greater the induced speed of electricity in the antenna? Reply in simple english please.

http://en.wikipedia.org/wiki/Coaxial_cable http://en.wikipedia.org/wiki/Poynting_vector Could a coaxial cable be used for electric current instead of radio signals? 'For example, the Poynting vector within the dielectric insulator of a coaxial cable is nearly parallel to the wire axis...

Hi All, Always wondered a few things about radio transmission, hoping to get some questions answered. 1. Is there a reason why certain frequencies are free to use by everyone and certain ones are reserved? Is it something to do with the fact that the cost (or means) to send signals on...

I have just had a very strange experience, and would like to know if there is an explanation for it. There was a small tin of black olives on my kitchen work surface. I put a teaspoon into the tin, to get an olive. The moment I did this, I heard what sounded like a radio broadcast of a...

Just some background - I am trying to measure spurious radio signals around a carrier in dBc units. It seems easy until you consider the resoultion bandwidth you are going to set your specan up with. If you start with a large bandwidth the spurious signals can get mixed up with the carrier and...

I figure that intelligent life couldn't have formed until, at the very least, the second generation stars that started birthing forth carbon (maybe 3 billion years after the Big Bang?). On Earth, it took something like 2.5 billion years until multicellular life formed, and so maybe we can...

Homework Statement Regulations require that licensed radio stations have limits on their broadcast power so as to avoid interference with signals from distant stations. You are in charge of checking compliance with the law. At a distance of 25 km from a radio station that broadcasts from a...

I've been puzzling how it is that you can tune into a signal on a particular frequency. How can it be possible to get rid of all the other signals that are added together? I don't know how much of this makes any sense, but I have tried to specify the problem mathematically. Suppose R_1(t)...

AM radio -- please help! Hello, Here is some background info. I don't know if it is all necessary to find a solution but here it is anyway: I am currently living in State College, PA. I would like to be able to listen to an AM radio station broadcasting from Philadelphia, PA...

can AM radio waves pass through glass been than FM radio waves? please explain why/how and how this can be shown in an experiment thx :)

it has always seemed incredible to me how little power it takes to transmit radio signals over vast distances,i have read about how these signals are self sustaining, i was wondering how long a signal could retain its information, could it go clear across the galaxy?