| Re: horn surfaces [message #17338 is a reply to message #17322] |
Mon, 10 January 2005 18:55   |
Criminy
Messages: 2
Registered: May 2009
|
Esquire |
|
|
|
Hello again, Earl. You said, "... if the wavelength is bigger than the waveguide dimensions ..." Would you explain what it is you mean by this? The only thing remotely similar I have read is that for proper loading, the mouth should be at least one wavelength in circumference at the desired cutoff frequency.
|
|
|
|
| Re: horn surfaces [message #17342 is a reply to message #17338] |
Wed, 12 January 2005 20:53 |
Earl Geddes
Messages: 220
Registered: May 2009
|
Master |
|
|
|
Once again, you have to remember my bent. Waveguides are for directivity control not loading. If the waveguide is smaller than the wavelength then it cannot control the directivity at all. It will still load, but at these frequencies the "flare rate" is virtually irrelavent as any shape ( that is increasing in area) with the same throat and mouth areas will load just about the same. At higher frequencies, the shape becomes everything in directivity control, but is still only marginaly a factor in loading.
|
|
|
|
| Re: horn surfaces [message #17343 is a reply to message #17342] |
Wed, 12 January 2005 21:50 |
Criminy
Messages: 2
Registered: May 2009
|
Esquire |
|
|
|
Sorry, I really do understand your bias towards directivity control; didn't mean to distract with the mention of loading. Let me rephrase the question. At what point does the wavelength become larger than the waveguide? When it is larger than the diameter of the mouth? than the circumference of the mouth? than the axial length of the waveguide? None of the above?
|
|
|
|
|
|
Posting Rules
Members
Search
Help
Register
Login
Get a T-Shirt!
