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Project Fases «МА RS -1» - «МА RS -2»- «МА RS -3»

MATRIX RADIOMETRIC SYSTEM FOR RATAN -600 «МА RS -3» Conclusion of installation A . B . B е rlin , N . A . Nizhelsky , М. G . Mingaliev , P . G . Tsiboulev , D . V . Kratov , V . V . Smirnov , O .М. Pylypenko.

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Project Fases «МА RS -1» - «МА RS -2»- «МА RS -3»

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  1. MATRIX RADIOMETRICSYSTEM FOR RATAN-600 «МАRS-3»Conclusion of installation A.B.Bеrlin , N.A.Nizhelsky, М.G. Mingaliev, P.G.Tsiboulev, D.V.Kratov, V.V.Smirnov, O.М.Pylypenko

  2. The system is developed for instrumentation supply of the Cosmological Geneproject (Scientific leader academician Yu.N.Parijskij Project Fases «МАRS-1» - «МАRS-2»- «МАRS-3» • «МАRS-1» (2001) - 1 radiometric module, that was developt and investigated in «Total power», «Noise addedradiometer» (NAR) and modulation (МОD) modes • «МАRS-2»(2003) – more than 3 years round-the-clock operated3-channel system (МОD mode) with basic parameters: Central frequency 30 GHz Bandwidth 4 GHz Тsys= 220 К (Sensitivity 6 mК/s1/2 for each channel) • «МАРС-3»(2006) - 16-channel system (МОD) with 5 GHz bandwidth, calculated Т sys= 200 - 210К, 5 mК/s1/2

  3. The base of matrix systems«МАRS-1» - «МАRS-2» – «МАRS-3»is the radiometric module, wichinclusiveall componemt parts of classic radiometer: front-end LNA, output amplifiers, bandpass filter, detector, low frequency amplifier • «МАRS-2» radiometric modulewith broad band fast-operating ferritemodulator

  4. Structure chart of 3-channel matrix radiometric system «МАRS-2»

  5. HF part of 3-channel matrix system «МАRS-2»,is more than 3 Years in operating at RATAN-600 radio telescope

  6. In 2004 the front-end partof the «МАRS-2» system was reconstructed (was add the possibility of axial rotation of linear polarization analyser to +-45о)

  7. The focal line of RATAN-600 Feed Cabin Nr.1with primary feeds.Qn the left3-channel matrix system «МАRS-2» is placed, on the rightis 3-frequency feed with superposed phase centers at decimeter wavelengths 13-31-49 сm

  8. Observation of radiation bands of Jupiterwithhigh resolution at RATAN-600 using «МАRSС-2» system

  9. A new element base of the «МАRS-3» receiving module1. Instead of hybrid front-end LNA (3 stage of PHEMT)the finished monolithic IC (f. Fujitsu)withnoise (160-170 К) less as hybrid circuit is used.2. In a back-end amplifiers are monolithic "unconditionally stable" IC with unipolar power supply, lower noise and greatlydepressed heat generation as comparison to «МАRS-2» are applicated.

  10. «МАRS-3» radiometric module with broad-band (5 GHz) ferrite modulator(on left) and noise generator module

  11. «МАRS-3»HF unitdraft • Front-end waveguide part: • Primary feeds (32) • Tranfers from round to rectangularsection with +-45о rotation(32) • Straight waveguides or +-45оtwists (32) • Curved waveguides withdirectional couplers for calibration • Modulators (switches) (16 ) Radiometric modules (16) with a new element base

  12. HF part of «МАRS-3»Front-end waveguides,switches and receiving modulesare on the unified temperature-stabilized aluminum plate encased.

  13. Underside of the assembly plates the power supply lines andthermostats are installed.

  14. By development of the «МАRS-3» systemwe pay attentionto search of fabrication method for many waveguide elements (primary feeds, twists, curved waveguides, directional couplers etc.)

  15. The first manufactured elements of the 16-channel (32 feeds) «МАRS-3» system are primary feeds and waveguide adapters from circular to rectangular section

  16. Waveguide partsof «МАRS-3» system: Twists to +-45оandbends in Е and Н-flatness

  17. Removable references for observationof distant radio sources and background radiations

  18. Choice of technology and development of adjusting devices for manufacture of waveguide parts : hogging (а) andtwist (b), precise soldering of flanges (candd)

  19. For feeding of active components the high-stable power supplies from Ekaterinburg (12 units) are usedwww.mikroakustika.ru

  20. Summary • 1. Use of know-how and microwave miniaturization showthe profitability of designingof the matrix systems in focal planeof the RATAN-600 radio telescope, which allowed the extension of number of elements N up to 100 andmore. • 2.It is possible in meridian receive modein square root of N to increase the sensitivity of RATAN-600 radio telescope and inNtime to reducethe number of days required for data storage from weak sources.

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