| 摘要 |
<p>A horn antenna arrangement comprising an H-plane sectoral horn (19) in combination with a feeder waveguide (2) in which radio-frequency energy is launched and propagated in the fundamental rectangular waveguide TE(1,0) mode and provided with a mode-converting section (25) of suitably shaped waveguide of reduced height in which the fundamental TE(1,0) rectangular type mode in, e.g. a planar arcuate input cross section (26), is smoothly and gradually converted into the fundamental TM(0,1) mode of an H-plane sectoral horn in an output cross section (30) which is cylindrically curved about the z axis forming the central axis of sectoral flare for the horn (19), substantially without generating any higher horn modes.</p> |
