wavelength in waveguide

[akmsali]

Dear Fellows,

[align=justify:2303daa709] If I am designing a horn antenna thanwhat is the wavelength in the waveguide. Is it a free space wavelength or do we have to calculate the wavelength in the waveguide, since horn is an open waveguide, dont you think we will consider free space wavelength in the waveguide. Please reply me as early as possible.[/align:2303daa709]
Thanks

 

[qiang]

i think you must think the vawelenth in the waveguide

 

[flatulent]

By the time the field gets to the far end of the horn it is the free space value. Horns are much broader bandwidth than waveguides.

Keep in mind that the horn should have a long taper for best swr.

 

[caocao]

HI
The far field design is by freespace wavelength and the characters such as matching or transmitting by guiden wavelenght
CaoCao p

 

[Kit-the-great]

All wavelength specifications of horn antennas are considered to be wl. in free space. The approximation of horn as open waveguide works only for long small-angle horns. The waves in the horn don't describes by harmonic (complex exponent) function, usually it's a special functions like Bessel (sectorial horn) or Hankel (pyramidal horn). This should be takes into account in wide-angle horn design.

Best regards,
Kit-the-great