A silicon photonics millimeter-wave (mm-wave) radar receiver (RX) integrated circuit (IC) for a multiple-input–multiple-output (MIMO) imaging radar is presented. Optical clock distributed over fiber enables coherent operation of several transceiver frontends for large apertures and finer angular resolution in the MIMO imaging radars. All electronic and photonic components needed to receive the optical clock signal, the electronic radio frequency (RF) signal, and the in-phase quadrature (IQ) downconvertion to the baseband is integrated in the RX frontend IC. The RX chip supports optical clock signals at 1310- and 1550-nm optical wavelengths. The chip is implemented in IHPs pre-production photonic 250-nm SiGe BiCMOS technology. At an intermediate frequency (IF) of 1 MHz, the measured conversion gain (CG) is 6.95 dB at an RF of 66 GHz and −11.18 dB at an RF of 77 GHz from −5-dBm optical modulation amplitude (OMA) and −13-dBm RF power. The RX IC dissipates 770 mW and is operated with a single 3.6-V power supply. For the realization of an optical receive path, an off-chip lithium niobate (LiNbO3) Mach–Zehnder modulator (MZM) was used. The optical receive path achieves a saturated OMA of −6 dBm at an RF of 77 GHz and at an IF of 1 MHz.

中文翻译：

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用于使用光时钟分配的毫米波大孔径 MIMO 雷达的硅光子雷达接收器 IC

介绍了一种用于多输入多输出 (MIMO) 成像雷达的硅光子学毫米波 (mm-wave) 雷达接收器 (RX) 集成电路 (IC)。分布在光纤上的光时钟支持多个收发器前端的相干操作，以实现 MIMO 成像雷达中的大孔径和更精细的角分辨率。接收光时钟信号、电子射频 (RF) 信号和同相正交 (IQ) 下变频至基带所需的所有电子和光子组件都集成在 RX 前端 IC 中。RX 芯片支持 1310 和 1550 纳米光波长的光时钟信号。该芯片采用 IHP 的预生产光子 250 纳米 SiGe BiCMOS 技术实现。在 1 MHz 的中频 (IF) 下，测得的转换增益 (CG) 在 66 GHz RF 和 −11 处为 6.95 dB。−5dBm 光调制幅度 (OMA) 和 −13dBm 射频功率在 77GHz 射频下为 18dB。RX IC 的功耗为 770 mW，采用 3.6V 单电源供电。为了实现光接收路径，使用了片外铌酸锂 (LiNbO3) Mach–Zehnder 调制器 (MZM)。光接收路径在 77 GHz 的 RF 和 1 MHz 的 IF 下实现了 −6 dBm 的饱和 OMA。