4. What is the impedance of a quarter-wave monopole over an infinite PEC ?
4. What is the impedance of a quarter-wave monopole over an infinite PEC ?
Consider the quarter-wave monopole in an infinite ground plane (which is a metal or PEC). How do the following parameters of this antenna compute to those of a half-wave dipole? a. Input resistance b. Radiation pattern c. Directivity (i.e. its max value) d. Gain (i.e. its max value) 4. nee-자기 dhai l< 4. nee-자기 dhai l
For an EM wave propagating toward a PEC surface, what happens to the impedance of the wave very close to the PEC surface?
USE QUARTER-WAVE METHOD It is desired to match a 50 Ω line to a load impedance of 60-j50 Ω. Design a 50 (Stub that will achieve the match. Find the length of the line and calculate how far it is from the load. 11.54
A 2-section quarter-wave transformer designed to match an unknown real impedance (Z) to a 50 Ω system is shown. The partial reflection coefficients at the TL impedance discontinuities are given. The centre frequency fo is set to be 1 GHz. Estimate Г (magnitude and phase) at 1 GHz and at 1.5 GHz with the simplifying assumption made in class that only the primary partial reflections are relevant to Γ. Ло/4 Zi Z3 Г,-0.15 「= 0.30 Γ,-0.15
9. An ideal Opamp has infinite input impedance but non-zero output impedance. The Opamp is used as a voltage follower interface for connecting a biomeasurement device to a voltmeter. If the voltmeter has an input impedance of 100Ω, what must the Opamp output impedance be to give a measurement error of less than 1%?
A lassless transmission line with characteristic impedance Zo - 50 R and length l = 0.42 is terminated into a load Z2 = 100+j401 (a) At what distance from the load is the input impedance real? (4 points) (b) If a quarter-wave transformer is to be used to match the load to the transmission line, what will be its characteristic impedance ? (4 points)
A monochromatic laser beam of intensity Io = 659 W/m2 is polarized in the y-direction and propagates in the positive z-direction. This beam is incident upon a quarter-wave plate whose fast axis makes an angle of 45 degrees with the x-axis as shown. Following the quarter-wave plate are two polarizers; the transmission axis of the first polarizer is aligned with the x-axis, while the transmission axis of the second polarizer makes an angle of θ1 = 72 degrees with the...
if a feeder having a characteristic impedance of 400 ohm is to be connected to an antenna having the impedance, calculate the spacing of quarter wave parallel wire feeder to be inserted between the two if the diameter of the wire is 3mn. 2)Draw LS-TTL NOR gate circuit 3)explain slope overload in digital communication 4)compare open collector output and totempole output?
3. Design a quarter wave transformer to match the following circuit: Your solution should indicate the required characteristic impedance of the transformer. Assuming an operating frequency of f = 5 GHz, and the phase velocity on the line is that of free–space, (i.e., vp = 3×108 m/s) how long should the transformer be in mm? 3. Design a quarter wave transformer to match the following circuit: ion should indicate the requir Your solut ed characteristic impedance of the transformer. Assuming...
Question 4 (a) The input impedance of a lossless air-core transmission line with characteristic impedance Ro. phase constant B and length I terminated in an impedance Z, is given by R,+Z, tan( i. Determine the length of an open circuit 50Ω line required to create a 0.1 nH inductor at a frequency of 10 GHz. (6 marks) ii. Determine the input impedance of the line in part () if the open circuit is changed to a short circuit. (3 marks)...