Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Dec 2;9:18125. doi: 10.1038/s41598-019-54627-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

PMC Copyright notice

300-GHz band and detected signal spectra when receiving AM signals. (a) 300-GHz band spectra with a carrier frequency (CF) of 351.3 GHz. RTD oscillation is not locked to the carrier wave. (b) Detected signal spectra with a carrier frequency of 351.3 GHz. The spectra of the AM signals at the centre frequency of 8 GHz were observed. This is the result of self-oscillating mixing of the RTD oscillator. Since the carrier and RTD oscillation frequencies are different, we have heterodyne detection. (c) Results for the maximum hold values of the centre spectra of the detected signals with a carrier frequency of 351.3 GHz. (d) 300-GHz band spectra with a carrier wave frequency of 343.2 GHz. (e) Detected signal spectra with a carrier frequency of 343.2 GHz. (f) Results for the maximum hold values of the centre spectra of the detected signals with a carrier frequency of 343.2 GHz.