Questions tagged [radio]
The radio tag has no usage guidance.
10
questions
1
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1answer
33 views
Why is the tv playing if the carrier frequencies in our RF project appear unsupported?
My group made an RCA video/audio to RF modulator for a school project. The video is a NTSC composite video signal. Here is a clip of our tv receiving the output of the project on NTSC channel 2:
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1
vote
1answer
55 views
Material to absorb very low frequency radio
Is there any material that will absorb very low frequency radio light? I know that stealth aircraft use radar absorbant materials in their design that absorb radio light best at certain frequencies, ...
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0answers
34 views
Swapping transmitter and receiver locations
Pardon me if this is a silly question, because I don't quite study RF.
Let's say I have a set of transmitter (radio + antenna) and a set of receiver (radio + antenna), at location A and B ...
2
votes
1answer
34 views
Propagation loss in USRP antenna
Problem
I have two USRP antennas close to each other. I know that signal strength on the receiving end has to be at least -80 dBm. Both antennas have 2 dBi of gain. I want to compute what ...
1
vote
1answer
47 views
Measuring intensity of a radio wave reflected from a metal plate
I am building a Project that can pinpoint location of a pen or any object (something as small as 0.5 mm radius sphere) placed on a flat screen.
I am using a ultrasound sensor (initially but i can ...
2
votes
2answers
336 views
Radio triangulation with Raspberry Pi
Currently, I am thinking that since electromagnetic waves loose energy over distance, you might be able to figure out the relative distance to each of three radio "beacons" and use this information to ...
0
votes
1answer
136 views
Ansys multiphysics import deformed mesh to HFSS
I want to run a coupled simulation in Ansys - RF heating and deformation of waveguide. Pictures of project layout and settings are here.
I calculated RF fields and surface losses in HFSS; imported ...
0
votes
1answer
18 views
Calculating the link budget of antenna and receiver with free space-path-loss formula
I really know that the real calulation of the range of UMTS, GSM or LTE antennas is depending on a lot of issues, reflection, and other stuff which makes it really complex.
I need only a rough model ...
1
vote
0answers
55 views
Can a casio fx series do this operation?
"Calculators stackexchange" doesn't exist, so I guessed this would be the right place to ask. Can a calculator solve $-0.2 \cdot e^{-0.06-4.2i}$?
Or any $e$ to a complex for that matter. I've been ...
0
votes
0answers
30 views
How do brass models work (radar)?
A common practice in naval research is to construct brass models of ships to study the reflectivity of a vessel. This can (supposedly) be used to understand the way it reacts to radar and the way ...
