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A novel frequency down-converter design at X-band for LEO satellite ground station using single conversion

Published online by Cambridge University Press:  21 November 2024

Ismail Sisman Open the ORCID record for Ismail Sisman [Opens in a new window] ,
Tugba Haykir Ergin  and
Duygun Erol Barkana
Ismail Sisman*
Affiliation:
R&D Department, Profen Communication Technologies, Istanbul, Turkey Department of Electrical and Electronics Engineering, Yeditepe University, Istanbul, Turkey
Tugba Haykir Ergin
Affiliation:
Department of Electrical and Electronics Engineering, Yeditepe University, Istanbul, Turkey
Duygun Erol Barkana
Affiliation:
Department of Electrical and Electronics Engineering, Yeditepe University, Istanbul, Turkey
*
Corresponding author: Ismail Sisman; Email: [email protected]
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Abstract

This paper presents the design and implementation of a broadband down-converter system using the AWR (Advancing the Wireless Revolution) modeling and Microwave Office tool. The radio frequency (RF) signal coming to the antenna interface requires a frequency down-converter to be lowered to the intermediate frequency (IF) band. It includes mixing blocks, oscillators, amplifiers, step attenuators, isolators, and filters. The input frequency band (RF) is 8250 ± 250 MHz, while the output frequency (IF) band is 720 ± 200 MHz. The gain dynamic range of the circuit is expanded through the use of digital attenuators. It is a superheterodyne down-conversion circuit, combining the IF band to produce the desired RF spectrum in one pass. Two phase-locked oscillators are used at the local oscillator port of the mixer, one providing a single frequency, while the other has a programmable frequency synthesizer with 1 MHz steps in the frequency range from 7280 to 7780 MHz.

Keywords

down-converterLEOsatellitesingle conversionX-band
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Issue 8 , October 2024 , pp. 1331 - 1341
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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