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A 340 GHz High Gaussicity Smooth Spline Horn Antenna for the STEAMR Instrument

Arvid Hammar (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Yogesh B. Karandikar (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Per Forsberg ; Anders Emrich (GigaHertz Centrum) ; Jan Stake (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik )
2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (1522-3965). p. 649-650. (2014)
[Konferensbidrag, refereegranskat]

We present the design, fabrication and measure-ments of a smooth walled spline feed horn antenna for the satellite borne climate research instrument STEAMR operating at 340GHz. A method has been developed which, for a certain desired beam waist, can be used to optimize the horn profile for high Gaussicity and ultra-low sidelobes. The simulated performance of the horn achieves a beam waist of 1.9 mm over the band 323-357 GHz with Gaussian coupling efficiency exceeding 98%. The peak cross-polar sidelobes are below -28 dB over the required frequency band. For cost effective manufacturing with high repeatability, the smooth wall spline profile is drilled in out from a metal block using a custom made broach. To validate the design and fabrication, planar measurements of the phase and amplitude have been performed and from measured E-field vital horn parameters have been extracted.

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Denna post skapades 2014-08-22. Senast ändrad 2015-12-09.
CPL Pubid: 201816


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