mmWave Signal Analysis Test Challenges - Boldly Go Where Nobody‘s Gone Before
Intensified sensitivity for cellular communication, increased speed for high-throughput satellite communication, enhanced range resolution for automotive radar applications―the amazing and lucrative opportunities of millimeter wave (mmWave) technology implementation are advertised everywhere. Deployment complexities, however, are often overlooked. Whether you prefer the iconic original Star Trek or eagerly await the Star Trek: Picard reboot’s second season, there is no denying that the classic sci-fi introductory theme imploring audiences, “...to seek out new life and new civilizations. To boldly go where no one has gone before,” unintentionally encapsulates millimeter wave technology's innovative imperative. If we hope to capture the same level of success in our quest as our celestial heroes had in theirs, we must overcome critical challenges including path loss, wideband noise, and frequency response. In a webinar examining how to tackle mmWave challenges, Paris Akhshi, Analytics and Instrumentation PhD and Product Marketing Manager at KEYSIGHT, discusses how flexible N9042B signal analyzer hardware and software enable optimized solutions for these mmWave metrology hurdles.
Previously, conducted measurements, predicated on wired device-under-test (DUT) probe points, were feasible test methods given lower frequency technology. However, over-the-air (OTA) tests are required for 5G New Radio (5G NR) mmWave spectrum technologies because components designed for mmWave devices are compact with no place to probe. Unfortunately, measuring performance via OTA methods increases difficulty achieving accurate, reproducible results. These complexities are exacerbated by high frequency path loss and wideband noise, as well as high frequency and wideband’s impact on frequency response.
At these higher frequencies, increased path loss between instruments and DUTs often results in low signal-to-noise ratio (SNR). In turn, this induces difficulty in acquiring signal analysis measurements including error vector magnitude (EVM). Additionally, wideband also negatively impacts SNR. While wideband enables advantages such as higher throughput, faster data rate, and lower latency, it comes with a cost: more noise is introduced to the system. Transmitted signals must now compete with a channel’s higher noise floor in order to be accurately detected. Finally, high operation frequency and wideband also make DUT isolation and characterization more arduous. Test system components such as cables, connectors, and fixtures between the signal analyzer and DUT contribute to erroneous frequency responses in amplitude and phase, degrading modulation quality.
Dr. Akhshi addresses mmWave complexities by discussing several RF signal paths — such as default path, microwave preselector bypass, low-noise path, and full-bypass path — to reduce noise, improve sensitivity, and achieve higher SNR. Additionally, Dr. Akhshi elaborates on how to improve signal condition with an optimized mixer in the system setup.
Boldly going into the new frontier of mmWave technology promises revolutionary advancements in everyday life and fundamental alterations to society’s infrastructure. With these massive changes come new challenges, most immediately including excessive path loss, wideband noise, and convoluted frequency response.
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提供是德(Keysight)，罗德(R&S)测试测量仪器租赁服务，包括网络分析仪、无线通讯综测仪、信号发生器、频谱分析仪、信号分析仪、电源等仪器租赁服务；租赁费用按月计算，租赁价格按仪器配置而定。
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配备KEYSIGHT网络分析仪，可测量无线充电系统发射机/接收机线圈的阻抗，电感L、电阻R、电感C以及品质因数Q，仿真不同充电负载阻抗下的无线充电传输效率。支持到场/视频直播测试，资深专家全程指导。
实验室地址： 深圳 提交需求>
授权代理品牌：集成电路
授权代理品牌：分立元件
授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
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