FM radio reception

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3 total messages Started by wsmith Sun, 02 Nov 1986 19:09

#7376

Author: wsmith
Date: Sun, 02 Nov 1986 19:09

8 lines
698 bytes


Why do FM radio's get better and then worse reception as you walk
around in the room where they are located?

Bill Smith
ihnp4!uiucdcs!wsmith
wsmith@a.cs.uiuc.edu

Waves (the sea-side variety)

#7390

Author: G.Hocking
Date: Thu, 06 Nov 1986 10:54

8 lines
766 bytes

[...suck this line-eater...]

Can any-one tell me (in relatively non-technical terms) why the seventh
wave on a beach is bigger than the previous six ??

                Yours Quizzically
                            Gary Hocking

Re: FM radio reception

#7391

Author: Philip Peake
Date: Fri, 07 Nov 1986 09:51

14 lines
1135 bytes

In article <162900001@uiucdcsb> wsmith@uiucdcsb.cs.uiuc.edu writes:
>
>
>Why do FM radio's get better and then worse reception as you walk
>around in the room where they are located?

Basically because FM is normally transmitted at VHF (~ 100 Mhz).
So, your body is a significant fraction of the wavelength (~ 3 meters).
Moving a conducting body around in a room, where you already have a
compilcated standing wave pattern (due to reflections of the radio signal
from walls etc) will disturb the standing wave patterns - hnce the signal
received by your radio.

Philip

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