The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2019
Filed:
Dec. 20, 2017
National Chung Shan Institute of Science and Technology, Taoyuan, TW;
Hong-Yeh Chang, New Taipei, TW;
Xiang Lin, Zhunan Township, TW;
Chien-Te Yu, Taoyuan, TW;
Hung-Ting Chou, New Taipei, TW;
Abstract
A reflective modulator which comprises a coupler, two diodes and two DC block units. The coupler has an input end used to output an output signal, an output end used to output an output signal, a first load end connected to one of the diodes and a second load end connected to another one of the diodes. The DC block units connect between the diodes and the coupler for DC blocking. A message signal is selectively inputted to both of the two DC block units for operating the state of the two diodes. The two diodes turn on when the message signal is large enough. The two diodes turn off when the message signal is not large enough. The two diodes are implemented by PIN diodes. A BPSK modulator using the reflective modulator and a quadrature modulator using the BPSK modulator is also introduced.