A Ku-band monolithic tuner-LNB for satellite applications [low noise block down-converter]

Proceedings of the IEEE 2004 Custom Integrated Circuits Conference (IEEE Cat. No.04CH37571) Pub Date : 2004-11-22 DOI:10.1109/CICC.2004.1358900

G. Girlando, T. Copani, S. Smerzi, G. Palmisano

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引用次数: 2

Abstract

A 12-GHz monolithic tuner for digital video broadcasting via satellite (DVB-S) applications is presented. The tuner is able to convert the typical 36-MHz wide DVB-S channel, lying in the Ku-band (10.7-12.75 GHz), to a fixed 1.45 GHz intermediate frequency (IF). The IC consists of a down-converter block and a PLL that implements a programmable divider. When the LO frequency is set between 9.25 and 11.3 GHz, the phase noise is lower than -115 dBc/Hz at 1-MHz offset. For an 11.7-GHz input signal, the conversion gain is 34.5 dB, the single-sideband noise figure is as low as 7.5 dB, while the 1-dB output compression point is as high as +5 dBm. Over the entire RF band, the conversion gain variation is within 3 dB. This first Ku-band monolithic tuner represents an improvement compared to the traditional low noise block down-converter (LNB). Indeed, instead of down-converting a wide RF band, the tuner-LNB directly selects the desired DVB-S channel. Thus, a more flexible use of the antenna cable bandwidth is achieved.

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用于卫星应用的ku波段单片调谐器lnb[低噪声块下变频器]

介绍了一种用于卫星数字视频广播(DVB-S)应用的12ghz单片调谐器。该调谐器能够将位于ku波段(10.7-12.75 GHz)的典型36 mhz宽DVB-S信道转换为固定的1.45 GHz中频(IF)。该集成电路由下变频模块和实现可编程分频器的锁相环组成。当本端频率设置在9.25 ~ 11.3 GHz之间时，偏移1mhz时相位噪声低于-115 dBc/Hz。对于11.7 ghz输入信号，转换增益为34.5 dB，单边带噪声系数低至7.5 dB，而1-dB输出压缩点高达+5 dBm。在整个RF频带内，转换增益变化在3db以内。与传统的低噪声块下变频器(LNB)相比，这是第一个ku波段单片调谐器的改进。实际上，调谐器lnb直接选择所需的DVB-S信道，而不是下变频宽带。因此，实现了更灵活地使用天线电缆带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the IEEE 2004 Custom Integrated Circuits Conference (IEEE Cat. No.04CH37571)

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