propagation mode การใช้

• Satellite : Not really a propagation mode, but an active repeater system.
• By March 1936 he had derived the propagation modes and cutoff frequency in a rectangular waveguide.
• For antennas, FM communications, repeaters, radio control and for other propagation modes where polarization does not matter as much.
• Whether the energy of a tsunami is concentrated in the P wave or in one of the other propagation modes depends on many factors.
• Propagation modes are computed by solving the Helmholtz equation alongside a set of boundary conditions depending on the geometrical shape and materials bounding the region.
• Each propagation mode of the waveguide is known as an eigenfunction solution ( or eigenmode solution ) to Maxwell's equations in the waveguide.
• Upon discovery of the other propagation modes possible at medium wave and short wave frequencies, the advantages of HF for commercial and military purposes became apparent.
• Because the underlying propagation mode is extremely broadband ( in the technical sense ), it can operate anywhere in the 20 MHz-20 GHz region.
• High angles are useful for Near Vertical Incidence Skywave and other short distance propagation modes, but substantial distance can still be covered even with modest height antennas.
• Ham operators seek to exploit the limits of the frequencies usual characteristics looking to learn, understand, and experiment with the possibilities of these enhanced propagation modes.
• One can visualize the case of linear birefringence ( with two orthogonal linear propagation modes ) with an incoming wave linearly polarized at a 45?angle to those modes.
• Yet, it is known that a propagation mode inside a guiding structure can be expressed as a superposition of a TM field and a TE field with reference to z.
• Single-mode fibers are often used in high-precision scientific research because restricting the light to only one propagation mode allows it to be focused to an intense, diffraction-limited spot.
• The propagation modes ( rotation axes ) are shown with red, blue, and yellow lines, the initial vectors by thick black lines, and the paths they take by colored ellipses ( which represent circles in three dimensions ).
• If a P-wave strikes an interface, four propagation modes may result : reflected and transmitted P and reflected and transmitted SV . Similarly, if an SV-wave strikes an interface, the same four modes occur in different proportions.
• "' Meteor burst communications "'( "'MBC "'), also referred to as "'meteor scatter communications "', is a radio propagation mode that exploits the ionized trails of meteors during atmospheric entry to establish brief communications paths between radio stations up to apart.
• The initial work was too develop their ILS system but further work investigated how far a beam of this frequency could be used to guide an aircraft . It was found that by using a combination of a large antenna, a powerful transmitter and maximum elevation of the antenna that ranger far in excess of those expected could be achieved . ( probably being caused by ducting, a little understood propagation mode at the time ).