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Given, at some point distant from a source at the origin in free space,
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Fundamentals of Electromagnetics with Engineering Applications
- The effective span of an antenna is 2.147 m2 at an operating frequency of 100MHz. The antenna has no conduction or dielectric loss. The input impedance of the antenna is 75Ω and it is connected to a 50Ω transmission line. Find the directionality of the antenna system. (The term "system" here refers to the effects of binding to the transmission line.) It will be assumed that there is no polarization loss.arrow_forwardAccording to the image answer the following questions. a) Is this system stable or unstable? (Justify your answer by giving reason) b) From H(z) , obtain an expression for H(ejw) , the frequency response of the system?arrow_forwardA rectangular waveguide is used to transmit power from a generator to a radar antenna. The guide has internal dimensions of 0.864 cm and 0.432 cm and operates at 23 GHz in TE10 mode. The transmitted power is 50 kW. Determine the magnitudes of the electric and magnetic field strengths in the guidearrow_forward
- A 1.3 GHz uniform wave of amplitude EX0 of 100 V/m at the origin is propagating in the z direction. The medium of propagation has the following parameters ε''=10 x10-11 F/m, ε'=1x10-11 F/m and μ=3x 10-6H/m. Find the instantaneous expression for the electric field.arrow_forwardThe effective area of a parabolic dish antenna is approximately equal to its physical aperture. If the directivity of a dish antenna is 10 dB at 1 GHz, what is its effective area? a)0.072 m2 B)0.72 m2 c)0.0072 m2 d)0.72 cm2arrow_forwardA rectangular waveguide is used to transmit power from a generator to a radar antenna. The guide has internal dimensions of 0.864 cm and 0.432 cm and operates at 23 GHz in TE10 mode. The transmitted power is 50 kW. Determine the magnitudes of the electric and magnetic field strengths in the guide. NEED A NEAT HAND WRITTEN SOLUTION , NO CHAT GPTarrow_forward
- A certain antenna has a gain of 7 dB with respect to an isotropic radiator. What is its effective area (in m^2) if it operates at 200 MHz? Round off your answer into two decimal places.arrow_forwardA parabolic reflector antenna has a diameter of 2.7 m. The antenna operates at 700 MHz. Calculate the directivity of the antenna?arrow_forwardA point source q1= 20nC is located at S(1,4 ), determine some points near S ,where the magnitude of electric field E is equal to 30V/marrow_forward
- Wireless and Communication! 1. An isotropic antenna is supplied with a 110 W power which is having a gain of 5 dB. Determine the effective isotropic radiated power (EIRP) and the power density at a distance of 9 km.arrow_forwardA spacecraft returning to Earth has 1015 m-3 ionized atoms around it and creates a density. Find the plasma frequency accordingly. Determine the cutoff wavelength taking into account communication with the ground station.arrow_forwardPlease can you help me to solve this question step by step!!!? 1. Assuming the spherical D- layer has a refractive index of 0.8, and the frequency of transmitted signal is 20MHZ at an angle of incidence 30°, with a wavelength of 0.8m. determine the following; a. The Electron density. b. The critical frequency. c. The refractive index. d. Critical density. e. The maximum usable frequency, if Nmax = 2x Ncriticalarrow_forward
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