A Ku-band satellite communication input multiplexer based on twelfth order waveguide bandpass filters
Belyaev B. A.1,2, Leksikov A. A.3, Aleksandrovsky A. A.3, Bal’va Ya. F.3, Serzhantov A. M. 1,2, Krekov S. D.3, Burlakov I. E.3
1Siberian State University of Science and Technology, Krasnoyarsk, Russia
2Siberian Federal University, Krasnoyarsk, Russia
3Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Email: belyaev@iph.krasn.ru, a.a.leksikov@gmail.com, slava_saa@mail.ru, cubicus@mail.ru, sdk@kirensky.ru, burlakov.ily@yandex.ru
A four-channel Ku-band multiplexer for a satellite communication system has been developed, based on domestically produced components. The central frequencies of the channel passbands are 12.70, 12.74, 12.78 and 12.83 GHz, and their fractional bandwidths are ~0.29 %, measured at a level of -1 dB from the minimum loss level. High frequency selectivity of the channels in the multiplexer is achieved by using twelfth-order waveguide bandpass filters, in which two attenuation poles are formed to the right and left of the passband to increase selectivity. A miniature input filter of the multiplexer with a passband of 11.8-13.7 GHz, manufactured on coaxial resonators, provides an extended (over 35 GHz) high-frequency stopband with a suppression level of at least 60 dB. The results of mechanical and climatic tests of the created multiplexer confirm its compliance with the requirements for onboard satellite communication devices. Keywords: multiplexer, band-pass filter, coaxial resonator, circulator, isolator.
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