A 0.32 THz SiGe 4x4 Imaging Array Using High-Efficiency On-Chip Antennas

被引：93

作者：

Uzunkol, Mehmet ^{[1
]}

Gurbuz, Ozan D. ^{[1
]}

Golcuk, Fatih ^{[1
]}

Rebeiz, Gabriel M. ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2013年 / 48卷 / 09期

关键词：

Direct detector; imaging array; millimeter-wave imaging; NEP; responsivity; SiGe; terahertz; FOCAL-PLANE ARRAY; DESIGN;

D O I：

10.1109/JSSC.2013.2262739

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a 0.32 THz 4x4 imaging array based on an advanced SiGe technology. Each pixel is composed of a high efficiency on-chip antenna meeting all metal-density rules, which is coupled to a SiGe detector and a low noise CMOS operational amplifier. A quartz superstrate is used on top of the imaging chip to improve the radiation efficiency. The array results in an average NEP of 34 pW/Hz(1/2) at an IF of 10-100 kHz for a detector bias current of 50-150 mu A, a responsivity of 18 kV/W and a 3-dB bandwidth of 25 GHz. The power consumption is 2.4 mW/pixel. Extensive measurements are presented which show the challenges encountered in obtaining accurate measurements at THz frequencies using a quasi-optical set-up, and the decisions taken to quote the average NEP values.

引用

页码：2056 / 2066

页数：11

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