In Nichols chart, resonant frequency is given by the largest value of M circle tangent to polar plot. Select one: O True O False
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- A transmission line has characteristic impedance of 75 Ω and it is connected to receiver with Zr= 100 − ?50 Ω, using smith chart to find: i. Reflection Coefficient; ii. VSWRIf you check the voltage at one-half wavelength from the end of an RF transmission line, what voltage would you measure? A. Peak B. Infinite C. Minimum D. ZeroThe effect of rain attenuation at high frequencies is minimized if vertical polarization is used. Select one: True False
- At a certain time, the maximum usable frequency (MUF) for transmission at an angle of incidence of 75° is 20MHz. A) What is the critical frequency in MHz? (Use two decimal places for the final answer) B) What will be the optimum working frequency (OWF) in MHz? (Use two decimal places for the final answer)Match the load, ZL = 300 + j600 ῼ to the line with Zo = 400 ῼ using a short-circuited shunt stub. If this match is true for a frequency 500 MHz, find the new SWR if frequency is changed to 350 MHz.Show work on smith chart find the shortest distance to match antenna 326+154J and transmission line 350 ohm ?
- Determine the incident angle that will cause signal to be propagated on the fiberPrepare a table of values for the change of maximum usable frequency when an incident angle [6M] change from 900 to 00 (calculate for every 10 degrees), and plot a graph, assume that the critical frequency is constant at 30MHz. and give your observation over the graph.A transmission line has characteristic impedance of 75 Ω and it is connected to receiver with ??=100−?50 Ω, using smith chart to find:i. Reflection Coefficient;ii. VSWR
- If propagation constant is 12<60°, then determine the value of phase constant and attenuation constant.Simplified or ideal equivalent circuit representation of transmission line at RF consists of: a. R and C b. R, L, C and G c. Rand G d. Land C Characteristic impedance at RF frequencies is purely: a. conductive b. resistive c. inductive d. capacitive Radiation loss of a transmission line: a. independent of frequency b. increases with frequency c. decreases with frequency d. increases at some frequency range and then decreases with frequencyAnticipating single band AM, what percentage of the total power is saved by suppressing the carrier and one sideband while transmitting the other sideband only for m=0.75?