How to increase the range of a pager alarm?
How to increase the range of a pager alarm?
I have a DEI 795W
I was brainstorming with a friend about possible ways of extending the range.
So far we came up with:
Soldering a flexible wire antenna to the pager unit that u carry.
Gluing a ribbon type antenna to the entire perimeter of the rear hatch window.
Anyone have any experience with this or know if this would increase the range?
I was brainstorming with a friend about possible ways of extending the range.
So far we came up with:
Soldering a flexible wire antenna to the pager unit that u carry.
Gluing a ribbon type antenna to the entire perimeter of the rear hatch window.
Anyone have any experience with this or know if this would increase the range?
Last edited by Gripenfelter; Aug 22, 2003 at 08:52 PM.
Increasing the size of the antenna shouldn't do anything but hurt it if it's already sized properly. The Antenna should be 1/2 the length of the radio wave it's trying to put transmit or recieve. If you look around online you can probably find what frequency your pager system works on & then find the formula. it's a really simple formula but I can't remember it at the moment
wavelength in meters = 300 / frequency in MHz
Example: f = 9.68 MHz
wavelength = 300 / 9.68 = 30.99 meters
1 meter = 3.28 feet
According to this formula, a frequency of 9.68 MHz would be equivalent to a wavelength of 30.99 meters, which we would round to 31 meters.
As the formula indicates, the wavelength of a radio signal decreases as its frequency increases. This is important because the length or height of various types of antennas must often be a fraction (usually one-quarter or one-half) of the wavelength of the signal to be transmitted or received. This means that most antennas designed for frequencies near 4000 kHz will be physically much larger than antennas designed for frequencies near 30 MHz.
You can read more here.
Example: f = 9.68 MHz
wavelength = 300 / 9.68 = 30.99 meters
1 meter = 3.28 feet
According to this formula, a frequency of 9.68 MHz would be equivalent to a wavelength of 30.99 meters, which we would round to 31 meters.
As the formula indicates, the wavelength of a radio signal decreases as its frequency increases. This is important because the length or height of various types of antennas must often be a fraction (usually one-quarter or one-half) of the wavelength of the signal to be transmitted or received. This means that most antennas designed for frequencies near 4000 kHz will be physically much larger than antennas designed for frequencies near 30 MHz.
You can read more here.
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