Multifrequency seashell antenna based on resonant cold-electron bolometers with kinetic Inductance Nanofilters for CMB measurements
Artikel i vetenskaplig tidskrift, 2019

A novel type of the seashell slot antenna with internal filters by the capacitance of resonant cold-electron bolometers (RCEB) and kinetic inductance of the NbN superconducting nanostrip has been realized for multifrequency pixels. Seashell antenna gives the opportunity to connect opposite slots by coplanar waveguides (CPW) instead of microstrip lines (MSL). A conventional multifrequency pixel combines a wideband antenna and narrowband filters with long microstrip lines with unavoidable losses and overlaps. Another problem is the frequency dependent beam width due to a fixed pixel diameter for multiple frequencies. The main advantage of the seashell antenna with nano-filters is independent tuning of the separate pairs of slots for each frequency avoiding frequency dependence of the beam width. We used λ/2 slots for 75 and 105 GHz, feeding by CPW near the end of slots for RF matching. Each RCEB includes two SIN (Superconductor-Insulator-Normal) tunnel junctions with a nano-absorber and NbN kinetic inductance of 450 or 310 pH. SIN junctions had capacitances of 9.3 and 7.2 fF and absorber matched to a wave impedance of the antenna near 50 Ohm. Kinetic inductance value was estimated at the level of 35 pH/sq. RF testing was done at 300 mK irradiating this chip by sweep generator from 60 to 120 GHz. The response curves showed clear resonances at 75 and 105 GHz with a quality factor of 10 and 7. These experiments confirm that the seashell antenna with the internal RCEB filters can be used for frequency selection in compact multiband pixels.

Författare

Anton Mukhin

Chalmers, Mikroteknologi och nanovetenskap (MC2)

Nizhny Novgorod State Technical University

Leonid Kuzmin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Nizhny Novgorod State Technical University

A. V. Chiginev

Nizhny Novgorod State Technical University

Russian Academy of Sciences

A. V. Blagodatkin

Russian Academy of Sciences

Nizhny Novgorod State Technical University

V. O. Zbrozhek

Nizhny Novgorod State Technical University

A. V. Gordeeva

Nizhny Novgorod State Technical University

Russian Academy of Sciences

A. L. Pankratov

Nizhny Novgorod State Technical University

Russian Academy of Sciences

AIP Advances

2158-3226 (ISSN)

Vol. 9 1 015321

Ämneskategorier

Telekommunikation

Signalbehandling

Annan elektroteknik och elektronik

DOI

10.1063/1.5080323

Mer information

Senast uppdaterat

2019-02-11