Antenna

The radio equipment of deferent information needs any support electromagnetic wave aerial. Aerial is one kind turns can implement. When blast off, it changes the high frequency electric current of catapult into dimensional electromagnetic wave. When

Posted at 08-08-11 by Admin views(3916)

Aerial is converter of a kind of energy, its action is the signal of high frequency concussion that exports machine of post a letter changeover is electromagnetic wave to the radiate in sky, on the other hand, transmit the electromagnetic wave change

Posted at 08-08-11 by Admin views(2956)

Radio with R 9700 for exemple! The telescopic antenna on machine is all and retractile! Compare fine and long garden with bead shaft, the diameter compares thick little of aerial pull rod slightly only, the printing paper that takes 1/4A4 (do not use

Posted at 08-08-11 by Admin views(1422)

The parameter that adjusts satellitic antenna focal length basically has part of azimuthal, angle of elevation, polarization these 3 parameter, among them azimuthal can be calculated with angle of elevation through receiving the longitude and latitud

Posted at 08-08-11 by Admin views(1677)

One, aerial efficiency Height of erect of length of frequency of appearance of qualitative, antenna, job, antenna, antenna concerns the conductor material of aerial efficiency and erect antenna. 1, aerial material is qualitative Choose electric prope

Posted at 08-08-09 by Admin views(1297)

In radio of course of study, the antenna of 1/4 wavelengh should be a kind of antenna with the simplest and not poor also effect so it has proportion of quite a few in radio group. Cite a case: If you have the antenna that the antenna on word patron

Posted at 08-08-09 by Admin views(2067)

The graph is the knot composition of a picture of aerial, this is antenna of a kind of planar ground connection, this antenna by perpendicular the 1/4 wavelengh that gets drive brace up child composition, brace up child as artificial as ground is rel

Posted at 08-08-09 by Admin views(1209)

Amount to of a kind of be similar in shape brace up child perpendicular polarization antenna, be called SLIM JIM aerial, already applied extensively in professional communication domain. In spare communication experiment, this kind fine thin amount t

Posted at 08-08-09 by Admin views(1846)

Amateur makes the point of paraboloid antenna---The relation of the radiation deflection Q of the F/D of paraboloid antenna and source of make a present of F/D (the focus that F is parabola, the caliber that D is parabola) the deflection Q with sourc

Posted at 08-08-09 by Admin views(1426)

One. Long term transmission line please Click here to get our dipole antenna Below high frequency circumstance, when transmission line of electromagnetic wave edge travels, because the wavelengh of electromagnetic wave is very short, can happen on

Posted at 08-08-09 by Admin views(1160)