A 340 GHz High Gaussicity Smooth Spline Horn Antenna for the STEAMR Instrument
Paper i proceeding, 2014

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.


Arvid Hammar

Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik

Yogesh Karandikar

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Per Forsberg

Omnisys Instruments

Anders Emrich


Jan Stake

Chalmers, Mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik

2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting

1522-3965 (ISSN)

978-1-4799-3538-3 (ISBN)


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