A monopole antenna is used to radiate 1079 W signal at frequency of 200 kHz, if a 50A uniform current is supplied to the antenna, Calculate: 1. The physical length of the antenna 2. The effective length of the antenna 3. The effective radiated power of the antenna 4. The electric field at a point 50km far-away from the antenna 5. The path loss in dB at the point 50km if the same identical antenna is used. Pa 120

1. The relationship between antenna efficiency and radiated power A. no relation B. Direct proportion C. Reverse fit D. No relation 2. At log-periodic antenna, if the frequency band increased then the number of element will be: A. Increased B. Decreased C. Not effected D. equally 3. At helical antenna the input resistance affected by increase the operating frequency. A. Increases B. Decreases B. equally D. not effected 4. If the diameter of isotropic antenna is 5cm and wavelength is 10 cm, then the far-field region is: A. 10 cm B. 5 cm C. 5m D. 10 m 5. The axial ratio of helix antenna is 1.1, what is the number of turn at twice the axial ratio? A. increases B. Decreases C. not affected C. equally

Q1) Very low signal strength in antenna. * Antenna patterns O Major lobes O Minor lobes O Null

a.What is the attenuation of 350 ft of RG-11 U coaxial cable at 100 MHz?b. A transmitter has an output power of 3 W that is fed to an antenna through an RG58A/U cable 20 ft long. How much power reaches the antenna?c. Two engineers have a disagreement over the selection of transmission line for connections within a 100m Data Centre on a project that is at risk for cost overrun. The first engineer is arguing in favor of using multi-mode fibre while the second engineer would like to use single mode fibre. You are the project engineer. Decide which of the two transmission lines to use and justify your answer.d. For typical silica optical fibres with ncore = 1.45 and Δ = 5 x 10-3, calculate nclad and NAe. For a typical silica fibre with D (@ λ = 1.3μm) = 2.5 nm ps/km and a semiconductor laser source centred on λ = 1.3μm with Δλ = 4nm: the bandwidth length BL ≈ 100 Gbps km (singlemode, step-index). What transmission speed is possible at a distance of 5km?f. A link from point a to point b is…