Vector Modulator for W -Band Software Radar Techniques
نویسندگان
چکیده
Direct-carrier modulation is an attractive technique for low-cost high-performance radar transceivers. In this paper, it is shown that, when the technique is applied to a generic homodyne radar architecture, the signaling waveform can be software adapted without requiring any hardware modifications. The key circuit in this novel software radar is a -band monolithic – vector modulator employing two push–pull (bi-phase) amplitude modulators. To fully exploit this circuit’s capacity to generate accurate constellations at millimeter-wave frequencies, a generalized theoretical analysis of the – (push–pull) vector modulator is presented. This is a comprehensive analysis of the topology and does not assume ideal components. As a demonstration of the vector modulator’s flexibility, a 76.5-GHz MMIC version has been fabricated and characterized by means of static -parameter measurements and by several modulation spectra. Based on the theoretical model and the measured results, the – (push–pull) vector modulator promises to be a vital component for the realization of future software radar.
منابع مشابه
Design and Realization of an Improved De-Q-ing Circuit for Regulation of Modulator Output Pulse Amplitudes in a Radar Transmitter
متن کامل
Design and Realization of an Improved De-Q-ing Circuit for Regulation of Modulator Output Pulse Amplitudes in a Radar Transmitter
متن کامل
Design and Implementation of Digital Demodulator for Frequency Modulated CW Radar (RESEARCH NOTE)
Radar Signal Processing has been an interesting area of research for realization of programmable digital signal processor using VLSI design techniques. Digital Signal Processing (DSP) algorithms have been an integral design methodology for implementation of high speed application specific real-time systems especially for high resolution radar. CORDIC algorithm, in recent times, is turned out to...
متن کاملTuning of fuzzy controller coefficients in direct torque control with space vector modulator for the three phase induction motors drive using Metaheuristic algorithms with considering electrical faults.
Among all the drive control methods of induction motors, the Direct Torque Control (DTC) method operates independently of the rotor parameters of the machine and, despite its simplicity, provides good torque control in both stable and transient modes. The use of residual comparators in these drives reduces the torque ripple and variable switching frequency. The most common solution is the use o...
متن کاملPolarimetric Analysis of Synthetic Aperture Radar Image Using Polsarpro Data Processing and Education Tool
Synthetic Aperture Radar (SAR) gives more resolution than conventional radars. SAR detects and produces the image of the object where conventional radar only detects the object. This paper analyzes the scattering mechanism at tree level of L–band SAR image by using POLSARPRO data processing and education tool. The main view of this paper is creating Pauli color composition of the forest image b...
متن کامل