The document discusses transmission lines and provides examples of calculating characteristic impedance, propagation constant, velocity of propagation, input impedance, reflection coefficient, standing wave ratio, and more for various transmission line scenarios. It also includes examples using the Smith chart to analyze transmission lines terminated with different loads.
Broadside Array vs end-fire array
Higher directivity.
Provide increased directivity in
elevation and azimuth planes.
Generally used for reception.
Impedance match difficulty in
high power transmissions.
Variants are:
Horizontal Array of Dipoles
RCA Fishborne Antenna
Series Phase Array
In radio and electronics, an antenna is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified.
Broadside Array vs end-fire array
Higher directivity.
Provide increased directivity in
elevation and azimuth planes.
Generally used for reception.
Impedance match difficulty in
high power transmissions.
Variants are:
Horizontal Array of Dipoles
RCA Fishborne Antenna
Series Phase Array
In radio and electronics, an antenna is an electrical device which converts electric power into radio waves, and vice versa. It is usually used with a radio transmitter or radio receiver. In transmission, a radio transmitter supplies an electric current oscillating at radio frequency to the antenna's terminals, and the antenna radiates the energy from the current as electromagnetic waves (radio waves). In reception, an antenna intercepts some of the power of an electromagnetic wave in order to produce a tiny voltage at its terminals, that is applied to a receiver to be amplified.
different types of internal and external noises, s/n ratio, s/n ratio of a tandem connection, noise factor, amplifier input noise, noise factor of amplifiers in cascade (friss's formula).
Reflex klystron amplifier used in microwave systems for generating higher frequency that we can used further for various purposes in microwave engineering.
different types of internal and external noises, s/n ratio, s/n ratio of a tandem connection, noise factor, amplifier input noise, noise factor of amplifiers in cascade (friss's formula).
Reflex klystron amplifier used in microwave systems for generating higher frequency that we can used further for various purposes in microwave engineering.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
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Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
1. Transmission Lines
Tutorial 7
1) Calculate the characteristic impedance, propagation constant and velocity of propagation at frequency
of 400KC/s for a transmission line having L=0.5mH/Km, C= 0.08μF and negligible R and G.
2) A lossless transmission line is 100cm long and operates at a frequency of 700MHz. The line
parameters are L= 0.3μH/m and C= 120pF/m. Find the characteristics impedance, the phase constant, the
velocity of the wave in line and the input impedance for ZL= 150 .
3) In a lossless transmission line, the velocity of propagation is 2.5x108
m/s. The capacitance of the line is
30PF/m, find (i) inductance of the line (ii) Phase constant at 100MHz (iii) Characteristics impedance of
the line.
4) A lossless transmission line is 80cm long and operates at a frequency of 600MHz. The line parameters
are L=0.25μH/m and C=100pF/m find:
(i) Characteristics impedance.
(ii) The Phase constant.
(iii) The velocity of the line.
(iv) The input impedance for ZL = 100.
5) A transmission line has the following primary constants per Km. [R=70,L=3mH, C=0.2μH]
Calculate the :
(i) Characteristics impedance and propagation coefficient at ω=4000rad/sec.
(ii) Current at 20Km from the sending end of the transmission line when the input voltage is 40<0˚ volts.
(iii) Phase difference between the received and sent currents.
(iv) Inductance of the loading coil at 30meters spacing to ensure distortion less transmission.
6)A lossless transmission line with Z0=60 is 400m long. It is terminated with load ZL=40+j80 and
operated at a frequency of 1MHz. Let the velocity v=0.8C on the line where C=3x108m/s. Find
a) The reflection Coefficient ().
b) The standing wave Ratio (SWR)
c) The input impedance (Zin)
7) Assume a two wire 300 lossless-line (Z0=300) such as the lead in wire form the antenna to TV.
Suppose the length of the line to be 2m and the value of L and C such that the velocity on line is
2.5x108m/s. Also suppose that the line is terminated with a receiver an input resistance of 300 &
represent the antenna by its Thevenin equivalent Z=300 in series with voltage source (Vs) =60V at
100MHz. Determine the load voltage, load current and power delivered to the load by the line.
2. 8)A 300 transmission line is lossless, 0.25λ long and is terminated by ZL=500. The line has the
generator with 90<0 in series with 100 connected to the input find
a) Load Voltage
b) Voltage at the midpoint of the line.
9) If a transmission line having characteristics impedance Z0=200 is operating at frequency 15MHz with
propagation constant =j0.5m-1, then determine;
a) Velocity of Propagation
b) Wavelength
c) Inductance
d) Capacitance
10) A transmission line has the following primary constants per Km: R=60, L=2mH, C=0.1μF, G=80μS
a) Calculate the characteristic impedance and propagation coefficient at ω=5000 rad/s
b) Calculate the current at 10Km from the sending end of the transmission line when the input voltage is
20<30 volts.
c) Calculate phase difference between the received and sent currents.
d) Determine the inductance of loading coils at 200m spacing to ensure distortionless transmission.
e) Determine the velocity if propagation when the loading coils in circuit.
11) A lossless 50 line is 1.5λ long & is terminated with a pure resistance of 60. The load voltage is
20<40 volts. Find
a) Average power delivered to the load.
b) The magnitude of minimum voltage on the line.
12) A transmission line with a Z0=300 is terminated in a purely resistive load. While making SWR
measurements, the meter reads a maximum voltage of 7.5μV and a minimum of 5μV. What should be the
load resistance?
13) Calculate the value of impedance of Quarter-Wave transformer to match the load impedance of 150
Swith line impedance of 100.
14) At an operating radian frequency of 500Mrad/s, typical circuit values for a certain transmission line
are: R=0.2/m, L=0.25μH/m, G=10μS/m and C=100pF/m. Find (a) ; (b) ; (c) λ;(d) Vp;(e)Z0
Ans:- 2.25mNp/m; 2.5rad/m; 2.51m; 2x108m/s; 50-j0.0350
15)Determine the value of L,C,R,G, per Km, Z0at 1MHz for a copper coaxial cable in which the inner
diameter of the outer conductor (2b) is 10mm and the ratio b/a is 3.6 for, Air dielectric.(Cu=5.8x107
S/m)
3. 16) A (75+j125) load is connected to 72 lossless line.
Find
i)
ii) VSWR
iii) The load admittance, YL.
iv) Zin at 0.3 from the load (using smith chart).
17) A line with negligible losses having characteristics impedance of 200 Ohms is terminated in a load
impedance of (100 + j180) Ohm. Find using Smith chart
i) Standing wave ratio
ii) Reflection coefficient
iii) Position of maximum voltage from load
18) A transmission line of RC = 100 is terminated at a load ZL = 150 + j 200 find (i) VSWR (ii) shortest
distance of 1s maxima & 1st
minima from load. (iii) Reflection coefficient with the help of smith’s chart.
19) A single stub tuner is to match the lossless line of 400ohm to a load of 800-j400ohm. The frequency
is 3Ghz. Find the position and length of the short circuited stub from the load end (using Smith Chart)
20) A load ZL = 60 + j80 terminates a 60 lossless transmission line. If the wavelength on the line is
18 cm.
i. How far form the load should the shortest possible short circuited 60 stub should be
located?
ii.What is the stub length?
21) A load of 100+j150 ohm is connected to a 75 lossless line, find using smith chart
a) Reflection coefficient b) VSWR c)Load admittance d) Zin at 0.4λ from load
e) Zin at generator if line is 0.6λ long.