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1461. http://www.cplire.ru/html/lab234/pubs/65.pdf
MMA Memo # 279 A submm SIS receiver with an integrated superconducting LO Valery P. Koshelets, Sergey V. Shitov Institute of Radio Engineering and Electronics RAS, Moscow, Russia ABSTRACT. ... This single-chip submm receiver contains a planar double-dipole antenna, SIS mixer and a superconducting Josephson-type local oscillator (flux-flow oscillator, FFO). ... Linewidth of a phase locked FFO as low as 1 Hz has been measured relatively to reference oscillator in the frequency range 270 - 440 GHz. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/65.pdf -- 365.3 Кб -- 28.02.2005
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1462. http://www.cplire.ru/html/lab234/pubs/60.pdf
Was presented at EUCAS'99, report 8D-2, Barcelona, Sitges, September (1999) Externally phase locked sub-mm flux flow oscillator for integrated receiver V Koshelets1, A Baryshev1,2, J Mygind3, P Dmitriev1, W Luinge2, N Whyborn2 1 2 3 4 V Vaks4, S Shitov1, L Filippenko1, Institute ... Lyngby, Denmark Institute for Physics of Microstructure, RAS, GSP-105, Nizhny Novgorod, 603600, Russia ABSTRACT: The feasibility of phase locking a Josephson Flux Flow Oscillator ( ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/60.pdf -- 180.2 Кб -- 28.02.2005
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1463. http://www.cplire.ru/html/lab234/pubs/ISEC99a/FBW_in_ChFFO.pdf
... To overcome this fundamental linewidth broadening we prop ose an on chip Cherenkov radiation flux-flow oscillator (CRFFO). It consists of a long Josephson junction and a sup erconducting slow wave transmission line that mo difies essentially the junction disp ersion relation. Two sup erconductor insulator-sup erconductor junction detectors are connected b oth to the long Josephson junction and the slow wave line to determine the available microwave p ower. ... Email: andrey@sron.rug.nl Fig. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/ISEC99a/FBW_in_ChFFO.pdf -- 1143.9 Кб -- 28.02.2005
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1464. http://www.cplire.ru/html/lab234/pubs/THz10/SIR_with_PLL.pdf
Superconducting Imaging Array Receiver at 500 GHz with Internal Local Oscillators Sergey V. Shitov, Valery P. Koshelets , Lyudmila V. Filippenko, Andrey B. Ermakov Institute of radio Engineering and Electronics (IREE), Russian Academy of Sciences, Mokhovaya ... The antenna beam of about F/9 with typical sidelobes less than ґ16 dB was measured and is close to the theoretical limit for this type of optics. ... Figure 1. ... The typical noise figure for the array is presented in Figure 5. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/THz10/SIR_with_PLL.pdf -- 783.0 Кб -- 28.02.2005
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1465. http://www.cplire.ru/html/lab234/pubs/ASC98/eac-02.pdf
... Copyright may be transferred without notice, after which this version may no longer be accessible Two-Stage S-band DC SQUID Amplifier Georgy V. Prokopenko, Dmitry V. Balashov, Sergey V. Shitov, Valery P. Koshelets Institute of Radio Engineering and Electronics, ... Physics, Technical University of Denmark, B309, DK-2800 Lyngby, Denmark Abstract A 6 mm x 6 mm chip comprising two identical dc SQUID based amplifiers (SQAs) has been designed, fabricated and tested as a ... Fig. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/ASC98/eac-02.pdf -- 176.8 Кб -- 28.02.2005
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1466. http://www.cplire.ru/html/lab234/pubs/ASC98/ema-09.pdf
... Properties of the integrated lens antenna were studied using an externally pumped reference SIS mixer which showed antenna sidelobes below -17 dB and a receiver DSB noise temperature, TRX, below 100 K within the frequency range 460 - 500 GHz that is close to the quantum noise. ... The basic element (pixel) of the array is a chip receiver, SIR, which contains a quasi-optical SIS mixer and a flux-flow oscillator (FFO) as a local oscillator (LO). ... Photograph of the chip receiver. ... Fig.6. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/ASC98/ema-09.pdf -- 728.3 Кб -- 28.02.2005
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1467. http://www.cplire.ru/html/lab234/pubs/ASC98/eob-05.pdf
... Copyright may be transferred without notice, after which this version may no longer be accessible Niobium Tunnel Junctions with Multi-Layered Electrodes Pavel N. Dmitriev, Andrey B. Ermakov, Alla G. Kovalenko, Valery P. Koshelets Institute of Radio Engineering ... The influence of the additional layer of aluminum in a composite base electrode on the properties ofthe tunnel junction have been studied in dependence on the aluminum thickness and distance of this layer from the barrier. ... Fig. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/ASC98/eob-05.pdf -- 171.3 Кб -- 28.02.2005
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1468. http://www.cplire.ru/html/lab234/pubs/ASC98/eqb-04.pdf
... The dependence of the FFO linewidth on the junctions parameters has been measured by using an improved technique based on harmonic mixing in the frequency range 250 - 600 GHz. ... A FFO linewidth as low as 3.3 kHz (determined by resolution bandwidth of spectrum analyzer) has been measured at 310 GHz; it is far below the fundamental level given by shot and thermal noise of the free-running tunnel junction. ... Fig. ... This model was used for quantitative analysis of the FFO linewidth measurements. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/ASC98/eqb-04.pdf -- 170.8 Кб -- 28.02.2005
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1469. http://www.cplire.ru/html/lab234/pubs/2000-02.pdf
... This single-chip sub-mm wave receiver includes a planar antenna integrated with a SIS mixer and an internal superconducting Josephson-type local oscillator (flux-flow oscillator, FFO). ... In this review the main attention will be paid to the results of a comprehensive test of an improved 500 GHz integrated quasioptical receiver comprising an FFO and SIS mixer with planar antenna. ... Well pronounced quasiparticle steps are clearly visible on the SIS IVC up to an FFO frequency of 665 GHz. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2000-02.pdf -- 2176.3 Кб -- 28.02.2005
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1470. http://www.cplire.ru/html/lab234/pubs/2000-04.pdf
... The sensor of the tester is designed on a base of the superconducting integrated receiver (SIR) chip working below 5 K. The chip sensor, beside the quasi-optical SIS mixer, contains an internal electronically tuned superconducting local oscillator, that provide low-noise operation at the level below 300 K DSB at central frequencies of 480-520 GHz as measured with a black body at the position of the test source. ... Fig. ... FFO frequency similar to pump level of the SIS mixer as in Fig. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2000-04.pdf -- 149.9 Кб -- 28.02.2005
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1471. http://www.cplire.ru/html/lab234/pubs/2000-05.pdf
... This single-chip submm wave receiver includes a planar antenna integrated with a SIS mixer and an internal superconducting Josephson-type Flux-Flow Oscillator (FFO). ... A noise temperature (DSB) below 100 K has been achieved for an integrated receiver with the FFO operating near 500 GHz. ... We demonstrated that an integrated receiver with the balanced mixer can operate with noise temperature less than 100 K (see figure 6) [13] that is at the level of the best SIS receivers with `traditional' LO. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2000-05.pdf -- 1038.2 Кб -- 28.02.2005
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1472. http://www.cplire.ru/html/lab234/pubs/2000-12.pdf
... Netherlands Received 16 May 2000; accepted for publication 24 August 2000 We have studied the properties of ( Nb0.35 ,Ti0.15) x N1 x films deposited by reactive magnetron sputtering at ambient substrate temperature, focusing in particular on the dependence of film properties on the total sputtering pressure ... Films sputtered under low pressures have a weak 100 texture, while films sputtered under high pressures have a distinct 111 texture. ... Phys., Vol. ... Phys. Lett. ... Phys. Tech. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2000-12.pdf -- 805.5 Кб -- 28.02.2005
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1473. http://www.cplire.ru/html/lab234/pubs/2000-01.pdf
REVIEW OF SCIENTIFIC INSTRUMENTS VOLUME 71, NUMBER 1 JANUARY 2000 Phase locked 270 ґ 440 GHz local oscillator based on flux flow in long Josephson tunnel junctions Valery P. Koshelets, Sergey V. Shitov, and Lyudmila V. Filippenko Institute of Radio Engineering and Electronics ... 9700 AV Groningen, The Netherlands Received 28 June 1999; accepted for publication 27 September 1999 The combination of narrow linewidth and wide band tunability makes the ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2000-01.pdf -- 341.3 Кб -- 28.02.2005
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1474. http://www.cplire.ru/html/lab234/pubs/2001-06.pdf
... Towards a Phase -Locked Superconducting Integrated Receiver : Prospects and Limitations V.P. Koshelets a,c *, S.V. Shitov b a,c b , P.N. Dmitriev , A.B. Ermakov , L.V. Filippenko , c c d a a a V.V. Khodos , V.L. Vaks , A.M. Baryshev ... A linewidth of a phase-locked FFO as low as 1 Hz has been measured relative to an external reference oscillator in the frequency range 270 ґ 440 GHz on steep Fiske steps in the low damping regime. ... FFO Line Shape and Linewidth Measurements. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2001-06.pdf -- 180.6 Кб -- 28.02.2005
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1475. http://www.cplire.ru/html/lab234/pubs/2001-04.pdf
... N films related to sputtering source characterization and optimization N. N. Iosada) Delft University of Technology, Department of Applied Physics (DIMES), Lorentzweg ... Physics (DIMES), Lorentzweg 1,2628 CJ Delft, The Netherlands Received 13 September 2000; accepted 18 December 2000 We compare the properties of planar single track balanced and unbalanced sputtering sources by comparing the film properties of NbN and Nb, Ti N ... Film stress vs Ar pressure modified from Ref. 7 . ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2001-04.pdf -- 253.5 Кб -- 28.02.2005
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1476. http://www.cplire.ru/html/lab234/pubs/2001-03.pdf
... The possibility of FFO phase locking at all frequencies of interest has to be proven before one initiates real FFO applications. ... The influence of FFO parameters, in particular the differential resistances associated both with the bias current and with the applied magnetic field on the radiation linewidth, has been studied. ... At lower FFO frequencies on Fiske steps, where the free-running linewidth f AUT is considerably smaller, an even better residual phase noise has been realized (see Fig. 2b...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2001-03.pdf -- 184.6 Кб -- 28.02.2005
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1477. http://www.cplire.ru/html/lab234/pubs/2001-02.pdf
APPLIED PHYSICS LETTERS VOLUME 79, NUMBER 3 16 JULY 2001 Low-noise 1 THz superconductor ґ insulator ґ superconductor mixer incorporating a NbTiNуSiO2 уAl tuning circuit B. D. Jackson,a) A. M. Baryshev, G. de Lange, and J.-R. Gao Space Research Organization of the Netherlands, Postbus 800 ... , 2628 CJ Delft, The Netherlands Received 17 August 2000; accepted for publication 15 May 2001 Low-noise heterodyne mixing at 1 THz is demonstrated in a quasioptical ... The SIS junctions are 1 m2. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2001-02.pdf -- 125.2 Кб -- 28.02.2005
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1478. http://www.cplire.ru/html/lab234/pubs/2001-01.pdf
... The SIS mixer is the most sensitive detector element for heterodyne reception in the frequency range 100 - 1000 GHz [1-7]. ... At lower FFO frequencies on Fiske steps, where the free-running linewidth fAUT is considerably smaller, an even better residual phase noise has been realized (figure 25). ... The absolute FFO phase noise (solid line in figure 26) is dominated by the synthesizer noise for offsets < 1 MHz. ... Experimental phase noise of a phase locked FFO at different frequencies. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2001-01.pdf -- 961.6 Кб -- 28.02.2005
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1479. http://www.cplire.ru/html/lab234/pubs/2003-03.pdf
... 2, JUNE 2003 1035 Externally Phase-Locked Flux Flow Oscillator for Submm Integrated Receivers: Achievements and Limitations Valery P. Koshelets, Sergey V. Shitov, Pavel N. Dmitriev, Andrey B. Ermakov, Alexander S. Sobolev, Mikhail Yu. ... Recently, using a new FFO design, a free-running linewidth 10 MHz has been measured in the frequency range up to 712 GHz, limited only by the gap frequency of Nb. ... Phys., vol. 56, pp. ... The dBc/Hz at phase noise of the phase-locked FFO is about GHz. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2003-03.pdf -- 274.9 Кб -- 28.02.2005
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1480. http://www.cplire.ru/html/lab234/pubs/2003-06.pdf
... 2, JUNE 2003 127 Analysis of the Fabrication Process of Nb/Al-AlNx/Nb Tunnel Junctions With Low RnA Values for SIS Mixers N. N. Iosad, M. Kroug, T. Zijlstra, A. B. Ermakov, B. D. Jackson, M. Zuiddam, F. E. Meijer, and T. M. Klapwijk Abstract--We characterize the fabrication process of superconductor-insulator-superconductor junctions (SIS) based on a Nb/Al-AlN /Nb tri-layer. ... E XPERIMENTAL T Fig. ... Fig. ... ANALYSIS OF THE FABRICATION PROCESS OF Nb/Al-AlN /Nb TUNNEL JUNCTIONS 129 Fig. ...
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Ссылки http://www.cplire.ru/html/lab234/pubs/2003-06.pdf -- 358.3 Кб -- 28.02.2005
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