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## New C-band Receiver for RT-32 Radio Telescope IAA RAS “Quasar” Network

Transactions of IAA RAS, issue 41, 53–56 (2017)

A. Evstigneev, A. Berdnikov, O. Evstigneeva, D. Marshalov. New C-band Receiver for RT-32 Radio Telescope IAA RAS “Quasar” Network // Transactions of IAA RAS. — 2017. — Issue 41. — P. 53–56. @article{evstigneev2017, abstract = {The report focuses on the new equipment developed in IAA RAS for the astrophysics VLBI 4.6–5.5 GHz (6.2 cm, C-band) band receivers in radiointerferometric network “Quasar”. The purposes were to increase the operational receiver reliability, to to expand the operating frequency band from 500 to 900 MHz and improve the technical characteristics. Low noise amplifiers in cryoelectronic frontend units were replaced with modern and more reliable ones. New dual channel frequency conversion units with integrated local oscillators were designed. Spectral characteristics of local oscillators were improved. Dual channel noise generators units with amplified compensating noise density were developed, their design and technical parametres are given. Modernization of the C-band receivers reduced the number of receiver units and increased overall operational reliability. Due to extended 900 MHz band the improvement of all basic receiving channel parameters is expected.}, author = {A. Evstigneev and A. Berdnikov and O. Evstigneeva and D. Marshalov}, issue = {41}, journal = {Transactions of IAA RAS}, keyword = {VLBI, C-band, radioastronomic receiver, “Quasar” network}, pages = {53--56}, title = {New C-band Receiver for RT-32 Radio Telescope IAA RAS “Quasar” Network}, url = {http://iaaras.ru/en/library/paper/1703/}, year = {2017} } TY - JOUR TI - New C-band Receiver for RT-32 Radio Telescope IAA RAS “Quasar” Network AU - Evstigneev, A. AU - Berdnikov, A. AU - Evstigneeva, O. AU - Marshalov, D. PY - 2017 T2 - Transactions of IAA RAS IS - 41 SP - 53 AB - The report focuses on the new equipment developed in IAA RAS for the astrophysics VLBI 4.6–5.5 GHz (6.2 cm, C-band) band receivers in radiointerferometric network “Quasar”. The purposes were to increase the operational receiver reliability, to to expand the operating frequency band from 500 to 900 MHz and improve the technical characteristics. Low noise amplifiers in cryoelectronic frontend units were replaced with modern and more reliable ones. New dual channel frequency conversion units with integrated local oscillators were designed. Spectral characteristics of local oscillators were improved. Dual channel noise generators units with amplified compensating noise density were developed, their design and technical parametres are given. Modernization of the C-band receivers reduced the number of receiver units and increased overall operational reliability. Due to extended 900 MHz band the improvement of all basic receiving channel parameters is expected. UR - http://iaaras.ru/en/library/paper/1703/ ER -