“Linear polarization”的意思、由来-开放百科全书

词条

Linear polarization

释义

Mathematical description of linear polarization
See also
References
External links

In electrodynamics, linear polarization or plane polarization of electromagnetic radiation is a confinement of the electric field vector or magnetic field vector to a given plane along the direction of propagation. See polarization and plane of polarization for more information.

The orientation of a linearly polarized electromagnetic wave is defined by the direction of the electric field vector.^[1] For example, if the electric field vector is vertical (alternately up and down as the wave travels) the radiation is said to be vertically polarized.

Mathematical description of linear polarization

The classical sinusoidal plane wave solution of the electromagnetic wave equation for the electric and magnetic fields is (cgs units)

for the magnetic field, where k is the wavenumber,

is the angular frequency of the wave, and is the speed of light.

Here is the amplitude of the field and

is the Jones vector in the x-y plane.

The wave is linearly polarized when the phase angles are equal,

.

This represents a wave polarized at an angle with respect to the x axis. In that case, the Jones vector can be written

.

The state vectors for linear polarization in x or y are special cases of this state vector.

If unit vectors are defined such that

and

then the polarization state can be written in the "x-y basis" as

.

References

{{cite book |author=Jackson, John D.|title=Classical Electrodynamics (3rd ed.)|publisher=Wiley|date=1998|isbn=0-471-30932-X}}

1. ^{{cite book | last = Shapira | first = Joseph | authorlink = |author2=Shmuel Y. Miller | title = CDMA radio with repeaters | publisher = Springer | date = 2007 | location = | pages = 73 | url = https://books.google.com/books?id=Yd56YZY1RpAC&pg=PA73&dq=%5Bpolarization+of+radio+waves%5D&hl=en&sa=X&ei=ZQx-T7_HNYT9iQKm59SeDg&ved=0CFgQ6AEwBQ#v=onepage&q=%5Bpolarization%20of%20radio%20waves%5D&f=false | doi = | id = | isbn = 0-387-26329-2}}

External links

[https://www.youtube.com/watch?v=oDwqUgDFe94 Animation of Linear Polarization (on YouTube) ]
[https://www.youtube.com/watch?v=Q0qrU4nprB0 Comparison of Linear Polarization with Circular and Elliptical Polarizations (YouTube Animation)]

{{FS1037C}}直線偏光Polaryzacja_fali#Polaryzacja_liniowa

1 : Polarization (waves)

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

Mathematical description of linear polarization

See also

References

External links