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We are developing multi-chroic double-slot antenna with cold-electron Bolometer (CEB) onchip filters for the 220/240 GHz interstellar dust monitoring channels of the LSPE–SWIPE experiment. For this goal, we used a narrowband double-slot resonant antenna with CEBs connected by coplanar lines. The simulations show that we have achieved 5% bandwidth for 220 GHz and 5.5% bandwidth for 240 GHz in our numeric modeling for the single cells. A series array of unit cells using double-slot design and coplanar lines with CEBs shows proper frequency selection. Estimations of the noise properties of the CEB arrays in a voltage-biased mode with the SQUID readout show photon-noise limited operation for the optical power load of 6 pW for channel 220 GHz and 20 pW for channel 240 GHz.

A dual-band cold-electron bolometer with on-chip filters for the 220/240 GHz channels of the LSPE instrument