What is the need for antenna for recieving FM radio, but not in AM radio channel?
339656
FM = frequency modulation.\n\nAM = amplitude modulation.\n\nwavelengths of AM radio are much larger than FM waves, which is why they are measure in kHz (compared to the MHz of FM). This is why AM radio signals are able to travel so much farther than FM signals. \n\nSince FM signals have much shorter wavelengths (and thus higher frequencies), the tuning needs to be more precise to pick up the desired signal, which is why an antenna is usually necessary.
215487
You can't pick up am/fm radio waves with your PC unless you have a special adapter, but a lot of radio stations provide internet streaming feeds too. A good starting place would be http://www.windowsmedia.com/Mediaguide/Radio which has a list of many radio streams, but other than that I would suggest doing a Yahoo search for the particular station you are looking for!
687895
i doubt you have to install an internal antenna in a laptop. all laptops prepared for an internal mini pci wireless card have the antenna already integrated. you cannot do that yourself, because the antenna is built-in in the rear side of the screen.\nin case you have a pcmcia wireless card you don't need an antenna, it's already integrated in this type of cards.
967921
Use outdoor antennas.
279103
I think you can...   the fact is that it's cheaper to do it with passive components and you will get a better response. I say because I had a project of radiocommunications and I tried an amplifier with an opamp which supposedly was for RF (the datasheet published a bandwidth of 1 GHz) for a band-pass centered a 220 MHz. The amplifier was not cheap but the response was very bad...  I ended with a RLC filter that did the job very good. That's my experience, and based in it I strongly recommend passive filters for RF applications.
516754
You should open up the mini-pci compartment and see if there are antenna cables there--some laptops have them preinstalled. Otherwise, you'll probably have to stick with your PCMCIA card, because there aren't mini-pci wireless cards that don't need antennas as far as I know.
945980
Hook up your computer to a radio transmitter.
275478
Cell phones, TV and radio reception
682558
It is impossible to give the simple answer for which you seem to be searching.\n\nThere are many frequencies which could be used to cover that distance.\n\nI recommend you read about radio communication in general and about h.f., v.h.f. and u.h.f. communications in particular.
317660
To receive an FM radio station on your computer, you would need a piece of hardware that can receive radio broadcasts. Many stations now broadcast over the internet, so you can receive a live feed from their website. Or you could sign up for XM radio online. It's not FM, but its way better.
665056
The basic components are:\n\nAn antenna (to "capture" the RF signal)\nA filter (LC circuit to tune to the frequency of interest)\nAn amplifier (to amplify the weak signal)\nAn FM demodulator (to downconvert and "decode" the FM signal and get back the baseband signal which is what our ears interepret as sound)\nAnother amplifer (make it variable so you can change the volume)\nA speaker\nOh, and of course the power supply (battery) to bias all the active components.\n\nI know you asked for a wiring diagram...but maybe try purchasing each of the above components seperately as modules and put the thing together... just do a google search... but congrads for trying to build an FM radio... It shouldn't be too bad... Make sure you have a bread board....
1185144
Radio signals, both AM and FM typically carry farther at night due to temperature layering of the atmosphere, which causes the radio waves heading to outer space reflect back down to earth. It's an atmospheric skip effect.
627347
Amplitude modulated radio radiation is the result of a disturbance in space. The signal travel in all directions and can be received at a wide range of location. However Am transmission is very suceptible to noise. Hence a lack of fidelity.\n\nFrequence modulation is really Power modulation rather than amplitude.Since the signal can vary as a fucntion of frequency there is better clarity in the reception. But the .Television signal Use the same principle as FM.Hower since the wave lenght of the signal carrier is much shorter. Hence they are more directional.The transmison cannot be as wide spread as the long wave in Am.
650858
sometimes they are used for radio antennas
40144
I guess you know that am radio reception is altered when you rotate your radio. To increase reception you have 2 alternatives. Either get a longer antennae (you can use the same antennae that you use for your tv regular,cable or satelite) or you can get a am reception booster from Radio Shack that electronically sucks in better reception but plan "A" works best.
156776
My only experience was investigating whether they would be useful and afordable, and I concluded that if you want a reliable leaky-cable antenna that meets FCC specs, you have to pay a lot of money.  They are mostly used for cell phone access in tunnels, and other professional applications. Also, if you want even roughly equal radiation per meter along the cable you have to dissipate a significant amount of transmitter power in a resistor at the end of the cable, and wireless access points don't have that much power to spare.
31426
Ask about the difference between AM and FM.  Ask about vertical or horizontal orientation of antennas.  Ask for a definition of UHF and VHF.