原标题：ADI ADAR1000四路8GHz-16GHz波束形成解决方案

　　ADI公司的ADAR1000是四路X波段和Ku波段(8GHz-16GH)z波束形成核集成电路,器件在接收和发送模式间半双工模式.接收模式,输入信号通过四路接收通路在RF_IO引脚组合,发送模式,RF_IO输入信号分列并通过四路发送通路.在两种模式,提供≥31 dB增益调整范围和360°相位调整范围,分辨率优于6比特(≤0.5 dB 和2.8°).集成了四路-20dbm到+10dBM功率检测器和温度传感器,四线SPI接口.主要用在相控阵雷达和卫星通信系统.本文介绍了ADAR1000主要特性和功能框图,以及评估板ADAR1000-EVALZ主要特性,连接图,电路图和PCB设计图.

　　The ADAR1000 is a 4-channel, X and Ku frequency band, beamforming core chip for phased arrays. This device operates in half-duplex between receive and transmit modes. In receive mode, input signals pass through four receive channels and are combined in a common RF_IO pin. In transmit mode, the RF_IO input signal is split and passes through the four transmit channels. In both modes, the ADAR1000 provides a ≥31 dB gain adjustment range and a full 360° phase adjustment range in the radio frequency (RF) path, with better than 6-bit resolution (less than ≤0.5 dB and 2.8°, respectively).

　　Control of all the on-chip registers is through a simple 4-wire serial port interface (SPI). In addition, two address pins allow SPI control of up to four devices on the same serial lines. Additionally, dedicated transmit and receive load pins provide synchronization of all core chips in the same array, and a single pin controls fast switching between the transmit and receive modes.

　　The ADAR1000 is available in a compact, 88-terminal, 7 mm×7 mm, LGA package and is specified from −40℃ to +85℃.

　　ADAR1000主要特性:

　　8 GHz to 16 GHz frequency range

　　Half-duplex for transmit and receive modes

　　Single-pin transmit and receive control

　　360° phase adjustment range

　　2.8° phase resolution

　　≥31 dB gain adjustment range

　　≤0.5 dB gain resolution

　　Bias and control for external transmit and receive modules

　　Memory for 121 prestored beam positions

　　Four −20 dBm to +10 dBm power detectors

　　Integrated temperature sensor

　　Integrated 8-bit ADC for power detectors and temperature sensor

　　Programmable bias modes

　　4-wire SPI interface

　　ADAR1000应用:

　　Phased array radar

　　Satellite communications systems

　　图1.ADAR1000功能框图

　　评估板ADAR1000-EVALZ

　　The ADAR1000-EVALZ evaluation board is designed for evaluating the performance of the ADAR1000, a 4-channel, X band and Ku band beamforming core chip for radar systems. All the radio frequency (RF) input/output channels and detector inputs are brought out to Subminiature Version A (SMA) connectors. On-board logic level translators convert the on-chip 1.8 V logic signals to 3.3 V for interfacing to external controllers running on 3.3 V. Two identical 20-pin, dual row rectangular headers provide the digital interface signals to allow daisy-chaining up to four ADAR1000-EVALZ evaluation boards together. A 24-pin connector provides control and bias outputs to interface to four external transmit and receive (T/R) modules with each ADAR1000-EVALZ evaluation board.

　　The ADAR1000-EVALZ evaluation board can be used with an Analog Devices, Inc., system demonstration platform (SDP) SDP-S or SDP-B board (supplied separately), which allows connection to a Microsoft Windows®-based PC through the USB for controlling of all the ADAR1000 device functions.

　　For full details on the ADAR1000, see the ADAR1000 data sheet, which should be consulted in conjunction with this user guide when using this evaluation board.

　　评估板ADAR1000-EVALZ主要特性:

　　Based on the ADAR1000 4-channel beamformer core chip

　　Controllable through SPI

　　Multiple forms of digital interface (3.3 V and 1.8 V logic)

　　On-board logic level translators with 1.8 V low dropout regulator for supply

　　Software control from a Windows-based PC through USB

　　图2.评估板ADAR1000-EVALZ外形图

　　详情请见:

20180619111252682.pdf

20180619111244723.pdf