11. The wavelength of the wave having propagation constant (0.314 + j0.628) per metre is equal to:
12. Many circles are drawn in a Smith chart used for transmission line calculations. The circles shown in the figure represent
13. Find the SWR, if the reflection coefficient is 0.8.
14. A dual directional coupler is connected in a microwave reflectometer measurement setup. The reading of the power meter in the forward direction is 100 mw and in the reverse direction 4 mw. The VSWR is
15. The characteristics impedance of quarter wave transformer with load and input impedances given by 30 and 75 respectively is-
16. If $$\overrightarrow E = \left( {{{\hat a}_x} + j{{\hat a}_y}} \right){e^{ikz - j\omega t}}$$ and $$\overrightarrow H = \left( {\frac{k}{{\omega \mu }}} \right)\left( {{{\hat a}_y} + j{{\hat a}_x}} \right){e^{ikz - j\omega t}},$$ the time averaged poynting vector is
17. For distortion less transmission through a channel, the channel should be such that
18. An electromagnetic wave propagates through a lossless insulator with a velocity 1.5 × 1010 cm/s. Calculate the electric and magnetic properties of the insulator if its intrinsic impedance is 90 π ohms.
19. For a lossless transmission line L = 0.35 µH/m. C = 90 pF/m and frequency = 500 MHz. Then the magnitude of propagation constant is:
20. The gradient of the function f(x, y) = x + y at the point (0, 0) is
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