RG-58 Coax Cable Quality Factor question, specfically parts d and e (I already c
ID: 2268319 • Letter: R
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RG-58 Coax Cable Quality Factor question, specfically parts d and e (I already computed CoilCraft Q):
2. In this problem, we will be looking at the Q of a Coilcraft 0201DS chip inductor as well as the Q from a half-wavelength transmission line constructed from an RG-58 coaxial cable. The data sheet for the Coilcraft 0201DS chip inductor has been uploaded to canvas. The RG-58 coaxial cable has the following parameters Zo=50 inner diameter = 0.81 mm Outer diameter 5.0 mm · From the datasheet, what is the approximate Q factor for the 3.9 nH inductor at a frequency of 300 MHz? At 300 MHz, how long should the RG-58 coax cable be to satisfy the half wavelength requirement, given that the wave velocity is 0.66c (where c is the speed of light in vacuum)? Calculate the attenuation constant, for the RG-58 coaxial line. Lecture 5, slide 23 and Table 2-2 in Inan and Inan should be useful for calculating this value. Pay attention to the units quoted in Table 2-2. What is the ratio of the Q for the transmission line resonator to the coil craft inductor? Why would transmission line resonators be more useful at frequencies> 300 MHz as opposed to frequenciesExplanation / Answer
Ans.) Transmission line resonators are more useful at frequencies greater than 300 MHz because of the following advantages:
On the other hand, at lower frequencies, i.e. below 300 MHz, more expensive components are required and there are higher atmospheric losses and lower outputs are achieved through active devices with greater component losses.
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