A 6GHZ direct-broadcast TV satellite system transmits 100W through a 2m diameter parabolic dish antenna from a distance of approximately 40, 000km above Earth's surface. Each TV channel occupies a bandwidth of 5MHZ. (a) For a receiver with Tsys = 580 K, what minimum diameter of a parabolic dish receiving antenna is required for high-quality TV reception with Sn = 40 dB? The satellite and ground receiving antennas may be assumed lossless, and their effective areas may be assumed equal to their physical apertures. (b) If the operating frequency of the communication system is doubled to 12 GHz, what would then be the minimum required diameter of a home receiving TV antenna? Answer : (a) d, = 2 m (b) d, = 2.545 m

A 6GHZ direct-broadcast TV satellite system transmits 100W through a 2m diameter parabolic dish antenna from a distance of approximately 40, 000km above Earth's surface. Each TV channel occupies a bandwidth of 5MHZ. (a) For a receiver with Tsys = 580 K, what minimum diameter of a parabolic dish receiving antenna is required for high-quality TV reception with Sn = 40 dB? The satellite and ground receiving antennas may be assumed lossless, and their effective areas may be assumed equal to their physical apertures. (b) If the operating frequency of the communication system is doubled to 12 GHz, what would then be the minimum required diameter of a home receiving TV antenna? Answer : (a) d, = 2 m (b) d, = 2.545 m

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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