11. A linearly polarized wave travelling in the negative z-direction has a tilt angle of 45" with respect to the x-axis.

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11 A Linearly Polarized Wave Travelling In The Negative Z Direction Has A Tilt Angle Of 45 With Respect To The X Axis 1 (52.19 KiB) Viewed 13 times

11. A linearly polarized wave travelling in the negative z-direction has a tilt angle of 45" with respect to the x-axis. The receiving antenna has polarization given by EA = E(4a, + ja,) a) What is the PLF? b) Assume the antenna is lossless and perfectly matched to the line and receiver. The incident wave has power density S = 5 mW/cm² and the directivity (broadside) of the antenna is Do = 6.8 dB. What power is received by the receiver? 12. At what distance is the inner boundary of the Fresnel region given a maximum allowed phase error of 1"? 13. For a dipole of length 1.51, find the: a) Total power radiated. b) Input resistance (assume the antenna is lossless). c) Input reactance. 14. Consider a loop antenna operating at 800 MHz with constant current and radius one wavelength. The loop is centered at the origin in the x-y plane. a) In what direction is the maximum radiation? b) Find the positions of all the nulls. c) A plane wave with power density S = 2 W/m² is travelling toward the antenna along the x-axis. Assuming the antenna is matched to the transmission line and receiver and is lossless, how much power is delivered to the receiver? 1/2 and progressive phase shift 15. Consider a uniform array of 5 elements with spacing B = 45°. a) What is the array factor? b) Where is the main lobe? .) Where are the nulls? c) What is the HPBW? e) What is the directivity?