New Compact Antenna Diversity with a Fully Integrated Microwave Circuit for Automotive Satellite Radio Reception

S. Senega, Jürgen Röber, A. Nassar, R. Weigel, C. Heuer, S. Lindenmeier
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引用次数: 2

Abstract

A compact antenna diversity system with a new integrated circuit is presented for automotive reception of satellite digital audio radio services (SDARS) at 2.3 GHz. For a scan-phase antenna diversity with switching and phase alignment of up to three antenna paths, the integrated circuit includes RF switches, phase-alignment and signal combining as well as the frequency conversion for level detection. This is the first integrated circuit for SDARS scan-phase antenna diversity, which includes all the diversity functions except for level detection and digital signal processing. With the integrated circuit with a package size of only 9 mm by 9 mm a compact hardware demonstrator is realized. The diversity circuit is independent of the radio and offers the same interface to the radio as a conventional single antenna. In laboratory measurements characteristic values of the RF signal paths like gain and variable phase shift are determined. In addition, the new compact diversity circuit is also evaluated in a real fading scenario on a single side mirror of the test vehicle showing a significant reduction of audio mutes by the diversity system compared to single antenna reception.
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新型紧凑型天线分集与一个完全集成的微波电路用于汽车卫星无线电接收
提出了一种采用新型集成电路的小型天线分集系统,用于车载接收2.3 GHz卫星数字音频无线电业务(SDARS)。对于具有最多三个天线路径的开关和相位对准的扫描相位天线分集,集成电路包括射频开关,相位对准和信号组合以及电平检测的频率转换。这是第一个用于SDARS扫描相位天线分集的集成电路,它包含了除电平检测和数字信号处理之外的所有分集功能。该集成电路的封装尺寸仅为9mm × 9mm,实现了一个紧凑的硬件演示器。分集电路独立于无线电,并提供与传统单天线相同的无线电接口。在实验室测量中,确定了增益和变相移等射频信号路径的特征值。此外,新型紧凑型分集电路还在测试车辆的单侧后视镜上进行了真实衰落场景评估,结果显示,与单天线接收相比,分集系统显著减少了音频静音。
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