(a) A 50 m long lossless transmission line with Zo = 50 ohms operating at 50 MHz is terminated with a load ZL = 90 + j 30 ohms. If
the wave velocity is u =0.8 c,where cis the speed of light in vacuum, find: i. The reflection coefficient ii. The input impedance (b) The Direct Broadcast System (DBS) satellite (at a distance of 39000 km)transmits at 13 GHz in the Ku Band, with a transmit power of 200 W, with a transmit antenna gain of 35 dB and with an IF (Intermediate Frequency)bandwidth of 30 MHz. The ground receiving station dish has a gain of 32 d Band sees an average background brightness temperature of Tb = 50 K. The receiver LNB (Low Noise Block) has a noise figure of 1.8 dB. Find: i.The EIRP (Effective Isotropic Radiated Power) ii.The power received at the input of the LNB iii.The signal to Noise ratio at the LNB output iv.Comment on what would happen if both transmit and receive antennas are replaced by typical monopole antennas. (c) A certain two-port network is measured and the following scattering matrix is obtained: [S]=\left[\begin{array}{cc} 0.3 \angle 0^{\circ} & 0.7 \angle 90^{\circ} \\ 0.7 \angle 90^{\circ} & 0.3 \angle 0^{\circ} \end{array}\right] From the data determine: i.If the network is reciprocal ii.If the network is lossless (d) Briefly describe how the following RF systems operate: i.Wilkinson power divider ii.Circulator
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Most Viewed Questions Of Structural Analysis
Two cables are tied together at C and are loaded as shown. Knowing that P = 500 N and a =determine the tension in (a) in cable AC, (b) in cable BC.60°, N= T_{A}= 3) The tension in the cable BC is \mathrm{T}_{\mathrm{B}}=
1. Classify each of the structures as statically determinate, statically indeterminate, stable, or unstable. If indeterminate, specify the degree of indeterminacy. (22 pts.)
8-3. Determine the vertical displacement of joint C.Assume the members are pin connected at their end points.Take A = 200 mm? and E = 200 GPa for each member.Use the method of virtual work.
10-6. Determine the moments at A, B, C, and D, then draw the moment diagram for the beam. Assume the supports atA and D are fixed and B and C are rollers. El is constant.
The roof system of an office building consists of a 4 in. thick reinforced concrete slab resting on four steel beams (A = 16.2 in.2), which are supported by two steel girders (A = 42.9 in.2). The girders, in turn, are supported by four columns, as shown in Fig. P2.8. Determine the dead loads acting on the girder AG.
Determine the reactions at the supports, then draw the moment diagram. The moment of inertia for each segment is shown in the figurc. Assume A and C are rollers and B is a pin. Take E=200 GPa.
7.10 through 7.12 Determine the smallest cross-sectional area A required for the members of the truss shown, so that the horizontal deflection at joint D docs not exceed 10 mm.Use the virtual work method.
Problem 6: CLO 1 The truss shown is used to support the floor deck. The uniform load on the deck is 2.5 kft. This load is transferred from the deck to the floor beams, which rest on the top joints of the truss. Determine the force in each member of the truss, and state if the members are in tension or compression. Assume all members are pin connected.
Q2. A simply supported beam, Figure 2a, with a cross-section shown in Figure 2b, is supportinga punctual load in the middle of its span. . Determine the reactions of the beam at the supports A and B b. Determine the maximum shear force sketching the shear force diagram c. Determine the moment of inertia, I, of the section Determine the values of the maximum shear stresses in the cross-section and sketch the diagram showing the values calculated(10 marks)
