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Derive the expression for input impedance of lossless line?

EC2305 Transmission Lines and Wave guides QUESTION PAPER

What is cut-off wavelength? What are the methods used for constructing a resonator?

A line for which the effect of resistance R is completely neglected is called dissipationless line. What is the range of values of standing wave ratio?

Derive the field configuration, cut off frequency and velocity of propagation for TM waves in rectangular wave — guides? The value of standing wave ratio is 2. What is the input impendence equation of a dissipation less line? Explain impendence matching using stub.

What are degenerate modes in a rectangular waveguide? Define Characteristic impedance Characteristic impedance is the impedance measured at the sending end of the line. This type of distortion is called frequency distortion.

The quarter wave line or transformer and the tapered line are some of the impendence matching devices. An application of the short circuited quarter wave line is an insulator to support an open wire line or the center conductor of a coaxial line. What are the types of cavity resonators? A finite line, which is terminated in its characteristic impedance, is termed as infinite line. Determine the characteristic impedance, propagation constant and wavelength for a source of f: What are the possible modes for TE waves in a circular waveguide?


EC Transmission Lines and Waveguides question bank download:Exams n Results

Give examples The electromagnetic waves that are guided along waveguidea over conducting or dielectric surface are called guided waves. Explain in details about the reflection on a line not terminated in its characteristic impedance Z0?

Give reasons for preferring a short- circuited stub when compared to an open circuited stub. How is the circle diagram useful to find the input impendence of short and open circuited lines?

ECTransmission lines and wave guides – Lecture Notes – Mohanavalli Edition

Name the three basic configurations of coaxial resonators. What are the conditions for a perfect line? Click here to sign up. In the method of impendence matching using stub ,an open or closed stub line of suitable length is used as a reactance shunted across the transmission line at a designated distance from the load ,to tune the length of the line and the load to resonance with an antiresonant resistance equal to Ro.

What is cut off frequency? How will you make standing wave measurements on coaxial lines? What are the root values for the TE modes? Give the formula to calculate waveguidds distance d from the voltage minimum to the point stub be connection. The performance parameters of microwave resonator are: The TE 10 wave have the lowest cut off frequency compared to the TM11 mode. The presence of electric field gives rise to a capacitance value and the presence of magnetic field gives rise to a inductance value and the finite conductivity in the walls gives rise to loss along the walls giving rise to a resistance value.


Hence it is operated as one to transmisaion transformer. Parallel plate wave guide consists of two conducting sheets separated by a dielectric material. A quater wave line may be considered as an impendence inverter because it can transform a low impendence in to ahigh impendence and vice versa. Give reason for an open line transmissiln frequently employed for impedance ec2350.

Hence TM01 and TM10 modes in a rectangular waveguide do not exist.

Determine the solution of electric and magnetic fields of TM waves guided along rectangular wave — guides? Give the maximum and minimum input impedance of the dissipationless line. What is patch loading?