Analysis of RFS Architecture of GK-3 Payload Ground Verification System

Jongmoon Lee*, Soonyoung Eom, Cheonsig Sin

The SBAS ground verification system uses the uplink frequencies of C1 (6855.42 MHz), C5 (6936.45 MHz), and the downlink frequencies of L5 (1176.45 MHz), L1 (1575.42 MHz). The RF Adapter consists of an L- band Coupler, an L-band Power Divider, a C-band Power Divider, a C-band Frequency Converter, an L-band Frequency Converter, and a Switch component. The RF Passive Assembly consists of an Uplink & Return Unit and a Downlink & Injection Unit. The Uplink & Return Unit consists of a C-band Power Divider, an Isolator, a C-band Filter, and an Attenuator, and the Downlink & Injection Unit consists of an L-band Power Divider, an L-band Filter, an Isolator, and an Attenuator. The RF Signal Monitor Assembly consists of a C-band Coupler, a C-band Power Divider, an L-band Power Divider, an RF Selector, and a Spectrum Analyzer. In addition, the C-band HPA Assembly was designed as a 1,500W SSPA, and the L-band LNA Assembly was designed with an LNA having a frequency of 1 to 2 GHz and a gain of 50 dB, as well as a directional coupler and BPF for the injection signal.
Keywords: GK-3, RFS, ground verification system

Speaker 이종문* 한국전자통신연구원