wt is the minimum frequency one can detect with such available antennas ? or rather can we detect frequencies in hertz range ?
2007-12-13 04:10:09 · 5 answers · asked by baadshah 2 in Science & Mathematics ➔ Engineering
A telescopic antenna is collapsible. It is a series of small diameter tubes of 6 to 8 inches in length nested one inside the other. The antenna can be extended to its full length or retracted to a small length for storage of portability.
Radio antennas are optimally sized based upon wavelength of the frequency they are expected to "see" . Even multiples of wave length are also used for antennas to minimize there length. i.e. ( 1/2 or 1/4 wavelength)
Antenna wave length (lambda) is base on the speed (c) that a radio signal travels which is about 3x10^8 m/s (300000000 m/s) divided by the frequency (f)
lambda = c / f
Frequencies in the hertz range would have wavelengths in the 1000's of kilometers range. So any practical length antenna (2 or 3 feet in Length) would work just as well as a larger 5 to 10 foot antenna as the wavelength is so large.
2007-12-13 09:10:36 · answer #1 · answered by MarkG 7 · 2⤊ 0⤋
Telescopic Antenna
2016-10-05 08:13:50 · answer #2 · answered by singleterry 4 · 0⤊ 0⤋
#Telescopic antenna UHF:
This is a a telescopic antenna that can be used with UHF radios the actual frequency is 460-480. The plug is an sma plug.
Telescopic antenna UHF Diamond:
Diamond bnc antenna 400-420 mhz This antenna is 15cm long when closed and 50cm long when opened.
Telescopic antenna VHF:
This is a a telescopic antenna that can be used with VHF radios the actual frequency is 150-170.
VHF Diamond antenna:
Diamond bnc antenna 140-170 mhz This antenna is 26cm long when closed and 106cm long when opened.
2007-12-13 05:01:40 · answer #3 · answered by alpha b 7 · 1⤊ 1⤋
it reduces in length
like the aerial on a radio that can be much longer than the radio
or the car aerial that gets shorter as you enter you garage
If you don't like the obvious answer (then you should have made you question a little more specific)
2007-12-13 07:42:15 · answer #4 · answered by Anonymous · 0⤊ 0⤋
No, HD is a digital media while antennas do not receive digital.
2016-03-14 07:42:55 · answer #5 · answered by Anonymous · 0⤊ 0⤋