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Performance Analysis of digital phase shifter using Hilbert transform  

Seo, Sang Gyu (동아대학교 전자공학과)
Jeong, Bong-Sik (동아대학교 전자공학과)
Publication Information
Journal of the Institute of Convergence Signal Processing / v.14, no.1, 2013 , pp. 39-44 More about this Journal
Abstract
In this paper digital phase-shifter for multi-arm spiral antennas was designed by using Hilbert transform. All frequency components in input signal are phase-shifted for 90 degree by Hilbert transform, and the transform is implemented by FIT and IFIT. Digital phase-shifter generates two signals with phase difference of 90 degree by using Hilbert transform from input signals sampled by analog-digital converter(ADC), and then the input signal is phase-shifted for a given phase by using two signals. Hilbert transform based on digital phase-shifter is designed by Xilinx System generator, and the effects of input noise, FIT point, sampling period, initial phase of input signal, and shifted phase are simulated and its results are compared with Matlab results.
Keywords
Mode-forming network; Digital phase-shifter; Hilbert transform; System Generator; Multi-arm spiral antenna;
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