Difference between Waveguides and Resonators

[CGandC]

Homework Statement

Are Waveguides considered to be Resonators?

Also, do resonators have to be closed? or can they have openings?

Relevant Equations

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I claim that waveguides are resonators because a resonator is defined as a device which can produce you normal modes of some ' mathematical object' you're looking for, which in waveguide's case is Electromagnetic fields ( waveguide can produce normal modes called TE and TM ).

Am I right?

 

[davenn]

Problem Statement: Are Waveguides considered to be Resonators?

Also, do resonators have to be closed? or can they have openings?
Relevant Equations: -

Am I right?

how about posting a link to somewhere reliable that supports your claim

 

[CGandC]

how about posting a link to somewhere reliable that supports your claim

It is from my study notes so there is no link.

 

[ehild]

Problem Statement: Are Waveguides considered to be Resonators?

Also, do resonators have to be closed? or can they have openings?
Relevant Equations: -

I claim that waveguides are resonators because a resonator is defined as a device which can produce you normal modes of some ' mathematical object' you're looking for, which in waveguide's case is Electromagnetic fields ( waveguide can produce normal modes called TE and TM ).

Am I right?

Waveguides do not produce normal modes, but allow some kinds of EM waves travel through them.

 

[danachiraq]

Waveguides are structures that direct electromagnetic energy along a desired path, transmission lines being just one example.
Resonators are usually in the form of shorted segments of shielded transmission lines.
Source from Waveguides and Resonators

 

[CGandC]

Waveguides do not produce normal modes, but allow some kinds of EM waves travel through them.

Why waveguides don't produce normal mode?
If waveguides do allow some kinds of EM waves to travel through them, they are identified by discrete numbers therefore they are defined as normal modes.

For example: $$ TE_{10} $$ is a normal mode and $$ TE_{20} $$ is another normal mode.

In other words, what would you define as normal mode?