Design and Measurement of Active Phased Array Radar Digital Receiver

This paper describes the calculation and measurement method of gain over temperature (G/T), which is the main characteristic of an airborne active electronically scanned array (AESA) antenna. Accordingly, we calculated the G/T of an AESA antenna based on earlier approaches. Then, we measured the G/T of two same AESA antennas in an anechoic chamber. The calculated and measured G/T of the AESA antenna were −9.2 dB/K and in the range of −10.1 to −8.2 dB/K, respectively. Based on the analysis and measurement, we proved that the proposed method was valid. The proposed method can also be used for other types of phased array antenna systems.

Section: 뜻한다unclassified

Gain Over Temperature (G/T) Calculation and Measurement for Airborne AESA Antennas

Park¹

2021

Design and Fabrication of Compact Digital Receiver for Acquiring L-Band Signal

Jeon¹,

Jo²,

Chae³

2019

In this paper, we have designed and fabricated a compact digital receiver for acquiring L-band signals. A receiver, based on direct RF sampling, has been designed for a compact multi-channel receiver. The design of the receiver is based on the system parameters and it is further fabricated on the basis of the simulation model. The performance of the fabricated digital receiver is analyzed by comparing it with the performance of the simulation model. It is observed that the fabricated digital receiver exhibits a receive sensitivity of −102 dBm, and eventually reaches the dynamic range of 62.7 dB.

Design and Performance Analysis of a Fixed-Point Based Beamforming Coefficient Calculator for Beamforming of a Digital Active Array Radar

Yang,

Bae,

Kang

et al. 2023

In this study, a fixed-point-based beamforming coefficient calculator is proposed for the beamforming of a digital active array radar. Floating-point-based calculations enable precise calculations but have the disadvantages of high computational complexity and latency. To complement this, the proposed fixed-point-based beamforming coefficient calculation had a high signal to quantization noise ratio (SQNR) of 51.35 dB and the beam steering angle error was between −0.05° and 0.05° when compared with those of the floating-point calculation; these satisfied the system requirements. The proposed fixed-point-based beamforming coefficient calculator was implemented on a Xilinx Kintex UltraScale FPGA. It could reduce 54.94 % CLB register, 44.33 % CLB LUT, 60 % DSP slice, and −58.16 % latency than the floating-point calculator. Furthermore, at small beam pattern powers, the performance degradation of the calculator was less compared with previous research.