Bi-SQUID arrays and parallel SQIF structures for active electrically small antennas

Soloviev, I.I.; Kornev, V.K.; Sharafiev, A.V.; Klenov, N.V.; Mukhanov, O.A.

Авторы: Soloviev I.I., Kornev V.K., Sharafiev A.V., Klenov N.V., Mukhanov O.A.
Журнал: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
Том: 6
Номер: 4
Год издания: 2012
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 591
Последняя страница: 597
DOI: 10.1134/S1027451012070129
Аннотация: The basic physics of the development of broadband active electrically small superconductive antennas for the subgigahertz and gigahertz frequency ranges, based on series arrays with cells characterized by a highly linear voltage response to the magnetic component B of an electromagnetic signal, are under consideration. As such cells, bi-SQUIDs and cells based on two parallel SQIF structures that are differentially connected are proposed. Series arrays of cells with linear voltage response, including an antenna prototype, are fabricated using standard niobium technology with a critical current density of Josephson junctions of 4.5 kA/cm(2) and are studied experimentally. The data obtained allow estimation of the achievable dV/dB conversion factor and the sensitivity delta B for an antenna integrated with a magnetic flux converter, placed on an available area of 3.3 x 3.3 mm of a chip 5 x 5 mm in size. These values are found to be 10 mu V/nT and 20 fT/Hz(1/2), respectively. The conversion factor increases in proportion with the area a (2) occupied by the antenna with a square flux converter, and the sensitivity is improved as a (-3/2).
Добавил в систему: Соловьев Игорь Игоревич

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Bi-SQUID arrays and parallel SQIF structures for active electrically small antennasстатья