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What is the dominant mode in rectangular waveguide?
Rectangular Waveguide - TE10; (TM11 in case of TM waves) Circular Waveguide - TE11;
What is the material use in the capacitor?
Capacitors are named after their dielectrics. So, an 'air capacitor' uses air as its dielectric, a 'mica capacitor' uses mica as its dielectric, and so on. There are lots of different dielectric used to separate the plates of a capacitor, each with different permittivities and dielectric strengths. As the perfect dielectric (i.e. one with both a very high permittivity and a very high dielectric strength) doesn't occur, the choice of dielectric is always a compromise between it permittivity and dielectric strength.
Why must the air inside a waveguide be dehumidified?
Moisture in the air in a waveguide can scatter the microwave energy the waveguide is designed to transport. This translates into signal loss or attenuation. The VSWR drops, and that is not a good thing.
What are the Differences between horn antenna and waveguide?
waveguide is a metal pipe that contains and guides microwaves from place to place in a microwave system (e.g. oscillators, amplifiers, mixers, modulators, filters, antennas)horn antenna has a waveguide connected at its focus, in transmit mode the waveguide feeds the horn which then emits a microwave beam, in receive mode the horn collects a microwave beam and concentrates it int the waveguide
What is circular waveguide?
It is a waveguide that is circular. Circular waveguides have modes that are described in terms of Bessel functions instead of the sines/cosines used for rectangular waveguides. The disadvantage is that the two lowest modes have cutoff frequencies spaced by less than an octave. Circular waveguides are used for rotating joints, for example in radar. The H01 mode in circular waveguide was used as a low-loss mode for transmitting signals over distance, but this technique has been replaced by fibre-optic cables.
What has the author Stauroula Maragkou written?
Stauroula Maragkou has written: 'A theoretical investigation of bends in nonradiative dielectric waveguide'
Why the phase velocity in a waveguide can exceed the velocity of light?
Guide wavelength is defined as the distance between two equal phase planes along the waveguide. The guide wavelength is a function of operating wavelength (or frequency) and the lower cutoff wavelength, and is always longer than the wavelength would be in free-space. Here's the equation for guide wavelength:Guide wavelength is used when you design distributed structures in waveguide. For example, if you are making a PIN diode switch with two shunt diodes spaces 3/4 wavelength apart, use the 3/4 of a guide wavelength in your design. The guide wavelength in waveguide is longer than wavelength in free space. This isn't intuitive, it seems like the dielectric constant in waveguide must be less than unity for this to happen... don't think about this too hard you will get a headache. === ===
Use of variable attenuator in waveguide?
It used to reduce the signal strength
What is detector mount in waveguide and its function?
used to detect the microwave signal
What is the dominant mode in rectangular waveguide?
Rectangular Waveguide - TE10; (TM11 in case of TM waves) Circular Waveguide - TE11;
What has the author M D Deshpande written?
M. D. Deshpande has written: 'Application of FEM to estimate complex permittivity of dielectric material at microwave frequency using waveguide measurements' -- subject(s): Network analysis, Dielectrics, Rectangular waveguides, Electric networks, Finite element method, Superhigh frequencies, Permittivity, Newton-Raphson method 'Application of finite element method to analyze inflatable waveguide structures' -- subject(s): Waveguide antennas, Inflatable structures, Finite element method, Rectangular waveguides
What has the author J T Kish written?
J. T. Kish has written: 'Theory of circular dielectric waveguide with anisotropic sheet cover' -- subject(s): Anisotropy, Circular wave guides, Circular waveguides, Dielectrics, Wave propagation
Why can't metal be used as a dielectric in a capacitor?
A metal can transmit the electron and the force so it is not a dielectric to electrons.
When is it advantageous to use a circular waveguide?
Circular waveguides offer implementation advantages over rectangular waveguide in Calculations for circular waveguide requires the application of Bessel.
What do you mean by dielectric and name any five materials used as dielectrics?
A 'dielectric' describes a material that supports an electric field and is generally used to describe an insulating material. Two properties exhibited by a dielectric are its permittivity and its dielectric strength. High values of permittivity (abillity to improve capacitance) are desirable for dielectrics used in capacitors, and high values of dielectric strength (ability to withstand voltages) are desirable for insulators but, unfortunately, the two quantities aren't relatated. So, selecting a dielectric is a matter of compromise.
How do capacitors classified?
capacitors are classified on the basis of dielectric material used inside it. For example the electrolytic capacitor consist electrolyte as dielectric mica capacitor consist mica as dielectric between plates and ceramic capacitor consist ceramic as dielectric.
What is the difference between rechtangular and circular waveguide?
The shape dictates the frequencies that can propagate. A circular waveguide will have one set of frequencies that can propagate, depending on its diameter and, if different materials are used, the makeup of those materials. A rectangular waveguide will have two sets of frequencies that can propagate (as I remember), each set depending on the dimensions of the rectangle.
