antenna radiation การใช้

• As one moves around, one gets a feel for the antenna radiation pattern.
• This leads directly to the earlier stated maximum gain relation to a dipole by the definition of gain a G = \ epsilon D where \ epsilon is the antenna radiation efficiency.
• The beam solid angle, represented as \ Omega _ A, is defined as the solid angle which all power would flow through if the antenna radiation intensity were constant at its maximal value.
• A user ( Mr . PIM ) has eliminated link from the Side lobes article to the related section in the German article on antenna radiation pattern ( : de : Antennendiagramm # Nebenkeulen ).
• For example, for axial-fed dish antennas, the antenna boresight is the axis of symmetry of the parabolic dish, and the antenna radiation pattern ( the main lobe ) is symmetrical about the boresight axis.
• In addition, a radio-frequency design engineer must be able to understand electronic hardware design, circuit board material, antenna radiation, and the effect of interfering frequencies that prevent optimum performance within the piece of equipment being developed.
• CEM typically solves the problem of computing the " E " ( Electric ), and " H " ( Magnetic ) fields across the problem domain ( e . g ., to calculate antenna radiation pattern for an arbitrarily shaped antenna structure ).
• The internal appearance of the radio frequency ( RF ) anechoic chamber is sometimes similar to that of an acoustic anechoic chamber, however, the interior surfaces of the RF anechoic chamber are covered with antenna radiation patterns, electromagnetic compatibility ( EMC ) and radar cross section measurements.
• It should be underlined that as the DUT may be considered any object " radiating or storing " electromagnetic field energy intentionally or unintentionally, e . g . the antenna radiation excited beyond its planar, cylindrical or spherical geometrical surfaces as a collection of a finite number of spatial samples.
• In brief, conditions at the two terminii of a path generally cause dissimilar polarization shifts, dissimilar splits into ordinary rays and extraordinary or " Pedersen rays " which are erratic and impossibly identical or similar due to variations in ionization density, shifting zenith angles, effects of the earth's magnetic DIPOLE contours, antenna radiation patterns, ground conditions and other variables.
• On March 2, 2012, Le5 Communications received approval from the CRTC to change the authorized contours of the station's rebroadcaster in Hearst, by changing the antenna radiation pattern from directional to non-directional, increasing the average effective radiated power ( ERP ) from 140 to 172 watts ( maximum ERP from 140 to 221 watts ), decreasing the effective height of antenna above average terrain from 56.6 to 43 metres and relocating the antenna site.