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. 17, 2022
Filed:
Dec. 13, 2018
University of Pretoria, Pretoria, ZA;
Tinus Stander, Pretoria, ZA;
Nishant Singh, Pretoria, ZA;
University of Pretoria, Pretoria, ZA;
Abstract
The invention relates to a tunable, silicon-based negative-resistance circuit () and to an active filter () for E-band frequencies (60 to 90 GHz). A base of a transistor () is connected to an on-chip inductive transmission line () which has a length of approximately a quarter-wavelength at a frequency of 83.5 GHz. The transmission line connects a DC voltage source () to the base terminal of the transistor () in order to bias the base. Another DC voltage source () is connected to the collector of the transistor () to bias the transistor. A capacitor () operatively bypasses or decouples the voltage source () in order to shunt high frequencies or alternating current (AC) signals to ground. The emitter terminal of the transistor () is connected to ground through a resistor () to limit the collector current (l). The circuit gives rise to improved quality factor of resonators.