Find the numerical aperture ‘θ’ if the MN = 6 cm, PR = 8 cm and the distance from the tip of the connector to the surface is 4 cm
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- For an optical fiber, the numerical aperture is 0.25, the core diameter is 20 mm and wavelength is 1.55 mm. Find the V number of the fiber.A 100az pC electric dipole is placed at the origin. Find V and E at the position (0, 0, 10). Ans: V = 9mV, E = 1.8ar mV/mA rectangular waveguide with dimensions a = 5cm, b = 4.2cm will operate below 4.5Ghz. if it is filled with a medium characterized by o = 0 e = 3E0 Ur = 2 How many TE and TM modes can I transmit? Calculate the cutoff frequency of the nodes
- A linear broadside antenna array with d = λ/10 between elements is designed. Maximum Calculate the number of elements in the array so that the diffusion is θ = 60◦What will be the maximum effective aperture or an antenna which is operating at a wavelength of 2 m and has a directivity of 100.A parallel-plate capacitor with dimensions of 12 mm by 9 mm and a plate separation of 1 micrometers exhibits a capacitance of 5 × 10-9 F. Assuming that the material is non-magnetic and the exhibits entirely electronic polarization, estimate its refractive index( εo= 8.854 × 10⁻¹² F·m⁻¹)
- 1. Discuss in detail the construction of a Directional Coupler. 2. Discuss in detail whether the incident energy can be sampled or not with pick up probe at port ‘4’.Antenna for a 3GHz radar costs $100000 per mm physical antena area .aperature efficency is 88% and avilabale budget has $300000 what is the maximum gain that can be purchased for avialable budget SNR requried maximum range 300 kms what is the maximum total lose that this radar can sustainA planar LED is fabricated from gallium arsenide which has a refractive indexof 3.6. Calculate the optical power emitted into air as a percentage of theinternal optical power for the device when the transmission factor at thecrystal–air interface is 0.68. When the optical power generated internally is 50% of the electric powersupplied, determine the external power efficiency.
- A point source q1= 20nC is located at S(1,4 ), determine some points near S ,where the magnitude of electric field E is equal to 30V/mAn aluminum waveguide (a = 4.2 cm, b = 1.5 cm, σc = 3.5 × 10^7 S/m) filled with Teflon (μr = 1, εr = 2.6, σd = 10^-15 S/m) operates at 4 GHz. Determine dielectric material attenuation (αd) for the TE1,0 mode.A rectangular waveguide with dimensions a = 1.5 cm, b = 0.8 cm is filled with a dielectric withµ = µ0 and ε = 4ε0. The magnetic field inside the guide is characterized byHx = 2 sin πxacos 3πybsin(π × 1011t − βz) (A/m)Determine:(a) The mode that is propagating inside the guide.(b) The cutoff frequency.(c) The propagation constant.(d) The wave impedance.