Question

A plane wave is incident on a dielectric slab of permittivity er and thickness d at an incidence angle θο, where d A)/(4 Ver) and λο is the free-space wavelength of the incident wave, as shown in the accompanying figure. If free-space exists on both sides of the slab, find the reflection coefficient of the wave reflected from the front of the slab. Assume normal incidence now. Under what conditions the reflection is minimum? Show an illustration of the problem, with clear definition and configuration of the fields considered, any assumptions made in solving the problem. Repeat the problem for maximum transmission. Suggest some practical application where this effect can be used.

Answer 1

913 Erto The feflection coefficient of the usave Tetlected from the frot of the alab とγ

EY Ey

coefficient (T)3M1-R reflection for dielectric slab 쎄리 So the) +Jer auing minimum seflecti on am Lvansmmission coeffi cients possible

Given two conditi one both minimum Meflection coefficient ame mazimum Tromsmisio coefficient coi be Possi ble only uoben the s eua to the omgle of inci clence is e

Er "This is the conditi ση foi minimum arnd max. mum coeffel en t reflects, troms mission Po Lavi2ation.
practical application:

In aircraft radar this affect cane be used.there is an antenna inside the aircraft beyond the dielectric beam.of the aircraft with thickness d.