6 (a) Assuming that a metallic rectangular waveguide whose cross-section is a x b such that a > b and it supports TM’ mo

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6 A Assuming That A Metallic Rectangular Waveguide Whose Cross Section Is A X B Such That A B And It Supports Tm Mo 1 (70.27 KiB) Viewed 29 times

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6 (a) Assuming that a metallic rectangular waveguide whose cross-section is a x b such that a > b and it supports TM’ mode or propagation. The field components can be expressed for TMP mode as: 1 aum Ex = jwue Oxəz 1 дФm Hx = иду 1дфт Hy i 024m Ey идх jwue ayðz 1 a 2 jωμε (772 E, + K2 ) - Um H, = 0 (i) Find the eigenfunction Ym (x,y,z) (ii) Determine the fundamental mode for TM’ mode. (iii) Draw the field patterns for TMzi and TM32 modes. 3 (b) What is evanescent mode? Give suitable example. What is intrinsic impedance? How to calculate it for TE and TM mode? (c) How can we excite TEžo mode in rectangular waveguide? 1