Engineering, 18.11.2020 17:30 alwaysneedhelp8420
Missiles with onboard radars must use durable high-temperature materials for the radome, which is the term for the covering that protects a radar or other type of antenna. One material that can be used for a high-temperature radome is alumina, a ceramic (A1,02), which has a relative permittivity of E, = 9.6 at a frequency of f = 26 GHz. Alumina is non-magnetic (u, = 1). (a) Calculate the wave impedance n of alumina (the ratio of the electric-field magnitude to the magnetic field magnitude) at 26 GHz. (b) What is the propagation constant B of a TEM wave in alumina at f = 26 GHz? (c) As you will find later in the course, a slab of lossless dielectric material one-half- wave thick can transmit essentially all of the TEM-wave energy normally incident upon it. If you wish to make a half-wave-thick radome sheet out of alumina at 26 GHz, how thick must it be? Express your answer in mm.
Answers: 2
Engineering, 04.07.2019 18:10, xboxdude06
Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.
Answers: 1
Engineering, 04.07.2019 18:10, dval1146
You are making beer. the first step is filling the glass carboy with the liquid wort. the internal diameter of the carboy is 15 in., and you wish to fill it up to a depth of 2 ft. if your wort is drawn from the kettle using a siphon process that flows at 3 gpm, how long will it take to fill?
Answers: 1
Missiles with onboard radars must use durable high-temperature materials for the radome, which is th...
World Languages, 06.07.2019 00:10
Mathematics, 06.07.2019 00:10