BROWSE
Detail
Conference Paper
K-band 4x4 Multi-Port Amplifier using Auto Port-to-Port Isolation Calibration Method
Cited - time in 
Share 
Share
- Authors
- Seong-Mo Moon, Dong-Hwan Shin, Man-Seok Uhm, In-Bok Yom
- Issue Date
- 2013-10
- Citation
- Ka and Broadband Communications, Navigation and Earth Observation Conference 2013, pp.1-7
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper proposes and realizes a new calibration method for a multi-port amplifier (MPA) to achieve optimum port-to-port isolation by correcting both amplitude and phase of calibration signals. The proposed architecture enables to detect phase and amplitude errors in each RF signal paths simultaneously, and enhances the calibrated resolution by controlling analog phase shifters and attenuators using DAC. The proposed MPA consists of input hybrid (or Butler) matrix (IHM), amplifier modules with phase shifters, attenuators and 180 phase shifters, directional couplers, and an output hybrid matrix (OHM) in regular sequence. The directional coupler is placed in front of the OHM for sampling the signal in array of paths. The calibration block for amplitude and phase error correction consists of a modulator, two QPSK demodulators, a DSP, and 16 DACs. Through the axial ratio calculation in the calibration block, amplitude and phase errors are detected and corrected. After auto output port-to-port isolation calibration, the validity of the designed 4×4 MPA shows 26 dB isolation characteristics over the frequency range 19.5 GHz to 22.5 GHz, respectively.
- KSP Keywords
- 9.5 GHZ, Amplitude and phase errors, Amplitude error, Axial Ratio, Calibration method, Frequency range, Phase Shifter, Port-to-port isolation, RF signal, directional coupler(DC), hybrid matrix