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An inline substrate integrated waveguide (SIW) front end consisting of a diplexer and an antipodal tapered slot antenna (ATSA) is presented. The diplexer employs a dual-mode SIW cavity to establish the junction between filters and the antennsa. The ATSA uses a Vivaldi profile and corrugations to enhance cross-polarization performance. A prototype is fabricated for operation at 23.7 GHz and 25.7 GHz,...
The design of substrate integrated waveguide couplers for adaptive receiver applications employing tapered slot antennas is presented. Two different 20 dB couplers are designed on low-permittivity substrate, and their performances are verified by commercially available field solvers. For an incident plane wave, the systems of antenna and couplers are demonstrated to provide the desired operation between...
The combination of the traveling wave OMT device and the ultra-low-noise MMIC amplifiers has allowed us to develop a broadband 6-8 GHz receiver with a noise temperature of around 10 K. The combination of receiver noise and the additional noise contributions by the telescope optics gives an overall receiver temperature of around 28 K and 34 K in the two polarizations. The large collecting area of the...
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