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:
Nov. 12, 2002
Filed:
Nov. 03, 2000
Mikhail Mordkovich, Brooklyn, NY (US);
Other;
Abstract
A load pull circuit with a monitoring port which provides a constant VSWR throughout a phase variation in excess of 360°. The fundamental circuit comprises a fixed resistor of fifty ohms placed in series with an external fifty ohm load monitoring port resistor to ground. In parallel with the two series resistors, which total 100 ohms, is placed a 33.3 ohm resistor that is connected to ground through a series L-C circuit. The capacitance in the L-C circuit is adjustable and can be varied to cause the L-C circuit to change in net value from being inductive, to being resonant, and finally being capacitive. This causes the 33.3 ohm resistor to be connected to ground through an inductor, then through a short, and finally through a capacitor, making the load pull circuit present a load that vary through 360 degree in phase, while still remaining at a VSWR of 2:1. The inductor in the L-C circuit is a varactor, making the sweep through all 360° totally electronically controllable and simple to automate. This invention reduces the measurement time from typically 5 minutes to less than one second.