This paper deals with the characterization of 2-stage RF power amplifier numerically and experimentally. The RF power amplifier is designed to work around frequency of 3GHz for frequency-modulated continuous-wave (FMCW) radar application. In the design process, the Agilent Design System (ADS R ⃝) software is utilized to determine the value of amplifier parameters such as gain and voltage standing wave ratio (VSWR). The 2-stage power amplifier is realized by use of AT-64020 transistors type, while the impedance matching circuit is implemented using microstrip lines. The Duroid/RT6006 dielectric substrate with the dielectric constant of 6.15 and the thickness of 1.27mm is applied for the implementation. The characterization result shows that VSWR IN and VSWR OUT of realized amplifier are 1.61 and 2.24, respectively, while the gain is 7.13dB which is 3.56dB lower than of the design result.
In this research, the design and manufacture of radar display software using Plan Position Indicator (PPI) format for air surveillance radar application are presented. The PPI display shows interpretations of echo detections of radar signal reflected from the flying objects/targets. The detection results will be displayed on a circular 360ᵒ area, where the radar position is at the center. System configuration is done via interface from the display, by adjusting the level of transmit signal, by setting the gain for threshold, and by enabling moving target indicator (MTI) mode. The MTI mode only displays moving objects and no non-moving objects are shown such as mountains and buildings. Based on the results of this research, the PPI display shows the targets on the display according to its position, some desired targets can also be tracked, information on target, GPS location, target ID, required parameters, and some settings. The radar display fulfills all the required capabilities for air surveillance radar.
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