- This Subject Is Wave Propagation And Antenna In Electrical Engineering 1 (95.82 KiB) Viewed 32 times
This subject is wave propagation and antenna in electrical engineering.
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This subject is wave propagation and antenna in electrical engineering.
This subject is wave propagation and antenna in electrical engineering.
Consider an airplane flying over the surface of the ocean, for which o=4 S/m, &r.=81 and ur=1. The airplane communicates with a submarine by transmitting a signal at 1 MHz, using a trailing long wire antenna. This transmitted wave may be assumed to be a uniform plane wave with Ei=2000cos(ot-Bız)axV/m, which is incident normal to the ocean surface (ocean surface is the x- y plane). Find (a) Attenuation constant a and propagation constant B in both mediums (let mediuml=air and medium2=ocean). (b) Reflection coefficient I, (c) Transmission coefficient t. (Hint: the ocean may be classified as a good conductor which can be seen by calculating 02/082) (d) If the submarine requires a minimum signal level of 5uV/m for adequate reception, determine the maximum communication depth of the submarine. (e) Time average power transmitted through 1m² area of ocean surface (evaluate at z=0). (f) Time average power dissipated in the surface of the ocean that is one skin depth =25.2 cm deep, and that has an area of 1m?.
Consider an airplane flying over the surface of the ocean, for which o=4 S/m, &r.=81 and ur=1. The airplane communicates with a submarine by transmitting a signal at 1 MHz, using a trailing long wire antenna. This transmitted wave may be assumed to be a uniform plane wave with Ei=2000cos(ot-Bız)axV/m, which is incident normal to the ocean surface (ocean surface is the x- y plane). Find (a) Attenuation constant a and propagation constant B in both mediums (let mediuml=air and medium2=ocean). (b) Reflection coefficient I, (c) Transmission coefficient t. (Hint: the ocean may be classified as a good conductor which can be seen by calculating 02/082) (d) If the submarine requires a minimum signal level of 5uV/m for adequate reception, determine the maximum communication depth of the submarine. (e) Time average power transmitted through 1m² area of ocean surface (evaluate at z=0). (f) Time average power dissipated in the surface of the ocean that is one skin depth =25.2 cm deep, and that has an area of 1m?.
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