The rf tag has no wiki summary.
1
vote
0answers
23 views
Does shadow fading change if obstacles are fixed?
Given a RF sender and a receiver, suppose the obstacles between them are fixed, both their material and dielectric properties, does the path loss caused by their shadowing vary? If yes, what causes ...
2
votes
1answer
124 views
RF WiFi Radiation
I would like to extrapolate my current router wifi radiation from my phone.
If I know that my router is transmitting at 300mW and my phone displays the strength in -dbm (from 0 to -100 scale) if I ...
0
votes
1answer
319 views
How do EM waves get detached from an antenna?
How does an electro-magnetic waves get detached from an antenna and spread to the space?
While an antenna receives an EM wave, which quantity of the EM wave (electric or magnetic) is used for ...
0
votes
1answer
111 views
Is it possible to make an RFID-like device which responds to a metal detector?
Would it be possible to make a small device which can be easily detected with a metal detector (or similar) from several feet away?
It would need to operate kind of like a shop-security tag but it ...
1
vote
2answers
325 views
How is antenna gain correlated to beam width?
Let's say you have two dipole type antennas. Antenna A has a gain of 2.15 dBi, a horizontal beam width of 360 deg and a vertical beam width of 45 deg. Antenna B is similar to antenna A, but has a ...
0
votes
1answer
162 views
A comprehensive reference for RF linear accelerator's operation
I'm doing a research on RF linear accelerators (RF Linac), but while studying the material I encountered many problems. I cannot understand the basics of the RF linear accelerators in many ways, for ...
1
vote
0answers
43 views
References for Radio Optics?
I'm really intrigued by a bunch of questions like 'what do radio waves look like?' 'how much RF radiation is there in the town I live in?' 'why does RF imaging work?'
But I think I need to do some ...
5
votes
1answer
1k views
Adverse Health Effects of Strong Radio Waves
A while ago, I was hiking near the Hollywood Sign in Los Angeles. When I got to the sign, I found out it was fenced off; with several signs and a security camera promising prompt enforcement. As I was ...
3
votes
4answers
2k views
Understanding the cause of sidebands in Amplitude Modulation
I've read it many places that Amplitude Modulation produces sidebands in the frequency domain. But as best as I can imagine it, modulating the amplitude of a fixed-frequency carrier wave just makes ...
6
votes
3answers
284 views
What makes an Antenna special?
The most important property of an antenna, beyond its conductivity(?) seems to be it's length (or more generally, its shape). But the antenna device is connected to the receiver by an ...
2
votes
1answer
251 views
RF ignition in metal halide lamps
We know that metal halide lamps and other HID lamps (like xenon/mercury arc ones) require 2-30kV+ spark to initiate discharge. Handling these voltages is not easy, and I am thinking if it's possible ...
