subject
Engineering, 30.12.2019 23:31 rafrod75

Astandard x-band rectangular waveguide with dimensions a = 0.9 in and b = 0.4 in is filled with lossless polystyrene (er = 2.56). for the lowest-order mode of the waveguide, determine at 10 ghz the following values:

(a) cutoff frequency

(b) guide wavelength

(c) guided intrinsic impedance

(d) guided phase velocity

assume the waveguide of part 1 is to be interfaced with a hollow waveguide of the same dimensions.
to avoid reflections, an additional x-band waveguide (of the same dimensions) a quarter-wavelength long section is inserted between the two.
assume dominant mode propagation and that the operating frequency is 10 ghz.

(a) determine the guided intrinsic impedance of the quarter-wavelength section of waveguide.

(b) determine the dielectric constant of the lossless medium that must be used to fill the quarter-wavelength section waveguide.

(c) determine the length of the quarter-wavelength section waveguide.

ansver
Answers: 1

Other questions on the subject: Engineering

image
Engineering, 03.07.2019 14:10, BardiFan
Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.
Answers: 3
image
Engineering, 04.07.2019 18:10, keigleyhannah30
Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.
Answers: 3
image
Engineering, 04.07.2019 18:10, lowkeyqueenk
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
image
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
You know the right answer?
Astandard x-band rectangular waveguide with dimensions a = 0.9 in and b = 0.4 in is filled with loss...

Questions in other subjects:

Konu
Geography, 18.05.2021 05:30