Broadband planar monopole antennas have received considerable attention due to their attractive advantages, such as ultra-wide frequency band, good radiation characteristic
, simple structures, low cost and easy fabrication [19-21].
Therefore, the correct choice of the distance value should be made depending on the application and the required shape of radiation characteristic
But he concurs with Forbes that the infrared detectors "are more sensitive and can do a more thorough job" of searching for radiation characteristic
of recent supernova explosions than radio telescopes.
Simulation 2: The radiation characteristic
of the circular metal plate, which has the same radius as the metal ball, are analyzed by means of the simulation modeling method proposed in this paper.
These polar plots at 6 and 18 GHz exhibit the desired symmetric radiation characteristic
required for polarization diverse applications.
Where large amounts of matter happen to be falling into the black hole, friction and gravitational stresses on the infalling matter can generate the radiation characteristic
of a quasar, which far outshines all the rest of the surrounding galaxy.
With the good directional radiation characteristic
of Yagi-Uda antenna, it is a good choice to achieve our bidirectional radiation target.
The proposed antenna has nearly omnidirectional radiation characteristic
in the H-plane and figure-eight radiation pattern in the E-plane over the three bands.
This science of astrochemistry proceeds by examining the spectra of objects in the sky for emissions or absorptions of radiation characteristic
of different chemical substances, either fairly sharp wavelengths (lines) or short ranges of wavelengths (bands).
Nevertheless, this radiation characteristic
is still acceptable because in modern wireless communications, the orientation of the handset or portable computer is not fixed, and the incoming signals are depolarized due to multiple reflections and scattering in the propagation channel.
the xz-plane, exhibited minimal changes, corresponding to the radiation characteristic
of a traveling wave antenna.
At 890 MHz, central frequency of the 824-960 MHz, similar half-wavelength dipole-like radiation pattern is observed in the azimuthal plane (xy-plane) shown in Figure 10(a), which indicates that stable radiation characteristic
is obtained over the antenna's lower band.