Polarization modulation spectrum

In summary, the use of polarization modulation in radio waves does not necessarily imply a broad frequency spectrum. The speed at which the polarization is changed determines the spectrum. It is important to check FCC regulations for the frequency or frequency band being used, as there may be restrictions on the type of spread spectrum allowed. An amateur or experimental license may be necessary for experimenting, and contacting the FCC directly is also an option. Their contact information can be found on their website.
  • #1
jk22
729
24
hello all. If one uses polarization modulation of radio waves does this imply a broad frequency spectrum knowing the carrier frequency and amplitude remain the same only the direction of the electric field is being changed ?
 
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  • #2
Whether you have a broad frequency spectrum or not is determined by how fast you can change the polarization. I strongly suspect that if you are modulating the polarization without modulating the carrier, a spectrum analyzer with an antenna of constant polarization e.g. vertical, will show sidebands as if the carrier was amplitude modulated.

You need to check the FCC regulations for whatever frequency or frequency band you're thinking of using. The regulations do permit spread spectrum emissions in certain bands. There may also be restrictions on the type of spread spectrum allowed. If you are thinking of experimenting, you should get either an amateur license or an experimental license.

You can also contact the FCC directly with your questions.

From http://esupport.fcc.gov/index.htm?job=contact_fcc_support

We encourage all of our visitors to browse Support by Topic prior to contacting the FCC.
Submit eSupport Request

Phone: (877) 480-3201
TTY: (717) 338-2824

Hours: Monday-Friday: 8:00 a.m. - 6:00 p.m. ET
(except Federal holidays)
 
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Related to Polarization modulation spectrum

1. What is polarization modulation spectrum?

Polarization modulation spectrum is a technique used in spectroscopy to measure the polarization response of a material as a function of its wavelength or frequency. It is typically used to study the electronic or vibrational properties of molecules.

2. How does polarization modulation spectrum work?

In polarization modulation spectrum, a polarized light beam is passed through a sample and the transmitted light is analyzed using a detector. The intensity of the light is modulated by changing the polarization of the light, and the resulting signal is used to construct a spectrum.

3. What are the advantages of using polarization modulation spectrum?

One of the main advantages of polarization modulation spectrum is its ability to selectively measure the polarization response of a sample. This can provide valuable information about the electronic and vibrational properties of molecules, which may not be possible to obtain using other spectroscopic techniques.

4. What types of materials can be studied using polarization modulation spectrum?

Polarization modulation spectrum can be used to study a wide range of materials, including gases, liquids, and solids. It is commonly used in the fields of chemistry, physics, and materials science to investigate the properties of molecules and materials at the molecular level.

5. What are some applications of polarization modulation spectrum?

Polarization modulation spectrum has many applications in research and industry. It is commonly used in the study of biomolecules, such as proteins and DNA, as well as in the characterization of materials for electronic and optical devices. It is also used in environmental monitoring and in the analysis of atmospheric gases.

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