## What is motional EMF?

An emf induced by motion relative to a magnetic field B is called a motional emf and is given by.

emf = Bℓv (B,ℓ, and v perpendicular) where ℓ is the length of the object moving at speed v relative to the field..

## How is Hfss bandwidth calculated?

Bandwidth for antenna can be calculated taking reference level of VSWR=2, or reflection coefficient =-10dB or return loss =10dB. Where, (fmax + fmin)/2 is called center frequency (fc). So, for wideband antennas %bandwidth must be calculated with respect to center frequency.

## Why is e plane tee called Series?

An E-Plane Tee junction is formed by attaching a simple waveguide to the broader dimension of a rectangular waveguide, which already has two ports. … T his E-plane Tee is also called as Series Tee. As the axis of the side arm is parallel to the electric field, this junction is called E-Plane Tee junction.

## Why it is called magic tee?

Operation. The name magic tee is derived from the way in which power is divided among the various ports. A signal injected into the H-plane port will be divided equally between ports 1 and 2, and will be in phase.

## What is the relation between E and H?

The ratio of E to H is the impedance of free space (by Ohms law): The impedance of free space, which is equal to 377 Ohms. is an important figure as it tells us the relationship between the E and H field strengths.

## What is the unit of E B?

SI electromagnetism unitsSI electromagnetism units v t eSymbolName of quantityUnit nameEelectric field strengthvolt per metreDelectric displacement fieldcoulomb per square metreεpermittivityfarad per metre18 more rows

## What is meant by radiation pattern?

In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the directional (angular) dependence of the strength of the radio waves from the antenna or other source. … Other software, like HFSS can also compute the near field.

## What are the applications of magic tee?

A magic-tee, or hybrid tee, is a 4-port waveguide structure that behaves as an electric field and magnetic field 3dB coupler, and is in fact, a combination of E-plane and H-plane tees. The magic-tee can be used as a power combiner or divider, depending on the needs of the application.

## How do you plot Co and cross polarization in HFSS?

In HFSS, first find the plane containing the E-field, e-g Y-Z plane contains the E-field, then go to results–> ceate far field report–>directivity or gain –> directivity phi or directivity theta and plot the result. this will give you the co and cross of the E-field.

## What is a 3dB coupler?

3dB, 90° Hybrid Couplers. A 3 dB, 90° hybrid coupler is a four-port device that is used either to equally split an input signal with a resultant 90° phase shift between output ports or to combine two signals while maintaining high isolation between the ports. Figure 1.

## What does S parameter mean?

Definition of S-parameters. S-parameters describe the response of an N-port network to signal(s) incident to any or all of the ports. The first number in the subscript refers to the responding port, while the second number refers to the incident port. Thus S21 means the response at port 2 due to a signal at port 1.

## What is radiation resistance of an antenna?

The radiation resistance can be defined as the value of resistance that would dissipate the same amount of power as radiated as radio waves by the antenna with the antenna input current passing through it.

## What are the two types of radiation pattern?

Radiation Pattern in 2D Two-dimensional pattern can be obtained from three-dimensional pattern by dividing it into horizontal and vertical planes. These resultant patterns are known as Horizontal pattern and Vertical pattern respectively.

## What is omnidirectional radiation pattern?

In radio communication, an omnidirectional antenna is a class of antenna which radiates equal radio power in all directions perpendicular to an axis (azimuthal directions), with power varying with angle to the axis (elevation angle), declining to zero on the axis.

## What is the difference between E plane and H plane?

E- plane and H-plane should be 90 degrees apart. In the case of the same linearly polarized antenna, this is the plane containing the magnetic field vector (sometimes called the H aperture) and the direction of maximum radiation. The magnetizing field or “H” plane lies at a right angle to the “E” plane.

## What is E and H field?

Electromagnetic waves are made up of Electric Fields (often called the E-field) and Magnetic fields (also known as H-fields). … The H-field is a vector quantity (has a magnitude and direction) and is measured in Amps/Meter [A/m]. Recall that the E-field points away from a positive point charge.

## How do you find the radiation pattern in HFSS?

Go to the project manager window —>right click on “radiation” —-> “insert far field setup” and set the range of phi and theta. This complete your far field setup. A window will open and tick under “visible” and then apply.

## How do you plot gains in HFSS?

Most recent answer. In HFSS go to HFSS tab> Results> Create Far Filed report> Rectangular Plot>select trace tab> Prime Sweep: select Freq> select Gain > select dB> go to familes tab > select Theta=0 and Phi=0 >then click New Report. Fallow this step and we have seen Gain Vs Frequency plot in HFSS.