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Millimeter-wave (mm-wave) radar is an essential sensor of advanced driver assistance systems and autonomous driving. Its detection requirement extends from traditional long-to-medium range to emerging short and ultra-short range for surround sensing, which is from sub-1 meter to 40 meters and requires a compact and low-cost solution with fast chirp generation to improve the range resolution [1] -[5]. In [2], 3 transmitters (TX) and 4 receivers (RX) are utilized to create a multi-mode radar transceiver, however its on-board antenna integration solution limits its size and cost for short-distance applications. In [3], 12TX and 16RX phase-domain multiple-input multiple-output (MIMO) radar is presented. However an external PLL is required, and the digitalprocessing power consumption is high. Furthermore its size and cost are not suitable for short and ultra-short applications. In [4], a compact 1TX and 1RX frequency-modulated continuous-wave (FMCW) radar is applied with an antenna-in-package (AiP) for short-distance applications, however its detection range is limited to only 20meters. This work presents a compact 76-to-81GHz FMCW MIMO radar with fast chirp generation and integrated with an AiP array in embedded glass fan-out (eGFO) technology for short and ultra-short range application. A fast-modulated chirp signal is especially crucial in MIMO radar for improving range resolution with update rate, and it also moves IF frequency away from the 1/f noise corner. Thanks to the dynamic bias technique, the chirp rate is improved to 312.5MHz/μs and the maximum modulation bandwidth is 7.2GHz. In addition, the 2TX and 6RX array antennas are integrated in package, and effective isotropic radiated power (EIRP) of the TX antenna is improved by 7.5dB by a coaxial feeding structure in eGFO technology with multi-feed antenna technique.

Background: The prevalence of primary hepatic mucosa-associated lymphoid tissue (MALT) lymphomas is extremely low. Here, we describe a case of this disease misdiagnosed as hepatocellular carcinoma (HCC) and review relevant literature to prevent future misdiagnoses. Case presentation: a 58-year-old woman complained about abdominal pain for more than four months. About two months prior, she came to our hospital with elevated levels of HBV DNA and positive HBsAg and HBcAb. After two months of entecavir treatment, HBV DNA decreased to a normal level. She returned to the hospital with worsened abdominal pain for over a month. Magnetic resonance imaging and systemic positron emission tomography-computed tomography identified two nodes in the liver, and she was diagnosed with HCC. The patient then underwent a laparoscopic hepatectomy. Microscopic examination showed a diffuse infiltrate of small-to-medium-sized lymphocytes and lymphoepithelial lesions. Immunohistochemical staining showed that most of the lymphoid cells were strongly positive for CD20, CD79a, BCL2, IgM and weakly positive for IgD, while negative for CD3, CD10, BCL6, MUM1, CD43, CD5, cyclin D1, CD23, CD30, and PD1. The Ki-67 index of lymphoid cells was 5%. Further pathologic analysis confirmed the diagnosis of primary hepatic MALT lymphoma. The patient received antiviral treatment and recovered well with no sign of relapse for 17 months. Conclusions: Primary hepatic MALT lymphoma is an uncommon disease that is difficult to diagnose and has no widely accepted treatment. Surgical resection is a good choice for both diagnosis and local therapy, and strict follow-up of the patient is essential.