1. MATRIX RADIOMETRIC SYSTEM 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 Gene project (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 added radiometer» (NAR) and modulation (МОD) modes «МАRS-2» (2003) – more than 3 years round-the-clock operated 3- channel system (МОD mode) with basic parameters: Central frequency 30 GHz Bandwidth 4 GHz Т sys = 220 К (Sensitivity 6 mК/s 1/2 for each channel) «МАРС-3»(2006) - 16-channel system (МОD) with 5 GHz bandwidth, calculated Т sys = 200 - 210К, 5 mК/s 1/2

3. The base of matrix systems «МАRS-1» - «МАRS-2» – «МАRS-3» is the radiometric module, wich inclusive all componemt parts of classic radiometer: front-end LNA, output amplifiers, bandpass filter, detector, low frequency amplifier «МАRS-2» radiometric module with broad band fast- operating ferrite modulator

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 part of the «МАRS-2» system was reconstructed (was add the possibility of axial rotation of linear polarization analyser to +-45 о)

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

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

9. A new element base of the «МАRS-3» receiving module 1. Instead of hybrid front-end LNA (3 stage of PHEMT) the finished monolithic IC (f. Fujitsu) with noise (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 greatly depressed 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 unit draft Front-end waveguide part: Primary feeds (32) Tranfers from round to rectangular section with +-45 о rotation (32) Straight waveguides or +-45 о twists (32) Curved waveguides with directional 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 modules are on the unified temperature-stabilized aluminum plate encased.

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

14. By development of the «МАRS-3» system we pay attention to 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 parts of «МАRS-3» system: Twists to +-45 о and bends in Е and Н-flatness

17. Removable references for observation of distant radio sources and background radiations

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

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

20. Summary 1. Use of know-how and microwave miniaturization show the profitability of designing of the matrix systems in focal plane of the RATAN-600 radio telescope, which allowed the extension of number of elements N up to 100 and more. 2.It is possible in meridian receive mode in square root of N to increase the sensitivity of RATAN-600 radio telescope and in N time to reduce the number of days required for data storage from weak sources.