Absolute and Precise Terahertz-Wave Radar Based on an Amplitude-Modulated Resonant-Tunneling-Diode Oscillator

被引：30

作者：

Dobroiu, Adrian ^{[1
]}

Wakasugi, Ryotaka ^{[1
]}

Shirakawa, Yusuke ^{[1
]}

Suzuki, Safumi ^{[1
]}

Asada, Masahiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Meguro Ku, Tokyo 1528552, Japan

来源：

PHOTONICS | 2018年 / 5卷 / 04期

关键词：

terahertz-wave radar; resonant-tunneling diode; amplitude-modulated continuous-wave radar;

D O I：

10.3390/photonics5040052

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present the principle of a terahertz-wave radar and its proof-of-concept experimental verification. The radar is based on a 522 GHz resonant-tunneling-diode oscillator, whose terahertz output power can be easily modulated by superimposing the modulation signal on its bias voltage. By using one modulation frequency and measuring the time delay of the returning signal, a relative measurement of the propagation distance is possible; adding a second modulation frequency removes the ambiguity stemming from the periodicity of the modulation sine wave and allows an absolute distance measurement. We verified this measurement method experimentally and obtained a submillimeter precision, as predicted by theory.

引用

页数：12

共 15 条

[1]

[Anonymous], 2015, HDB TERAHERTZ TECHNO

[2]

Asada M., 2015, HDB TERAHERTZ TECHNO, P151

[3] Theoretical analysis of external feedback effect on oscillation characteristics of resonant-tunneling-diode terahertz oscillators [J].