| Summary: | 碩士 === 國立交通大學 === 電子研究所 === 107 === Conventional radars are mechanically rotated to achieve signal reception in all
directions. Therefore, the scanning speed is limited by the rotation of the antenna, and
it is easy to wear and broken. It evolves into an electronic scanning radar, among them,
a phase-controlled radar is the most. In the past, passive phase-controlled radar its
phase shifter and the waveguide component will make signal correction difficult and
the emission energy will be easily depleted. Therefore, the current radar trend has
gradually turned into a digital active phase array radar, which controls each array unit
to load the radar waveform while the digital signal is adjusted the phase. Through the
Base-band enables the RF-band to synthesize the beam in the specified direction,
achieving fast radar scanning and accurate correction, and implement a variety of
radar applications by defining the waveform and timing control in all digital domain.
This paper will introduce the full digital active phase array radar system, which
implements phase control and timing control functions based on Field Programmable
Gate Array (FPGA). It includes two radar waveform applications and its digital signal
processing, such as frequency modulated continuous wave radar (FMCW), and linear
frequency modulated (LFM) pulse-mode radar.
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