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In this paper a novel single layer planar antenna, which simultaneously radiates circularly polarized waves and linearly polarized waves at two different frequencies for the mobile phone and ISM bands, is presented. Software simulations of the proposed design and associated measurements are reported as well. The presented antenna has the following features: (a) it is a single-layer electrically small...
We are developing the Atacama large millimeter/submillimeter array (ALMA) band 10 (787-950 GHz) receiver cartridge. The double-side-band (DSB) mixer consists of a corrugated feed horn, a full-height waveguide mixer block and a Nb(Ti)N-based superconductor-insulator-superconductor (SIS) mixer chip. The IF system uses a 4-12-GHz cooled low-noise InP-based MMIC amplifier and a 4-12-GHz isolator. Heterodyne...
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