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:
Jun. 10, 2008
Filed:
May. 12, 2005
David D. Heston, Dallas, TX (US);
John G. Heston, Murphy, TX (US);
Thomas L. Middlebrook, Iii, Rowlett, TX (US);
David D. Heston, Dallas, TX (US);
John G. Heston, Murphy, TX (US);
Thomas L. Middlebrook, III, Rowlett, TX (US);
Raytheon Company, Waltham, MA (US);
Abstract
According to one embodiment of the invention, a power absorber for receiving a signal having a fundamental frequency includes an input node for receiving the signal and a first PIN diode circuit having a first end electrically connected at the input node and a second end. The first PIN diode circuit includes at least one PIN diode. The absorber also includes a load resistance having a first end electrically connected to the second end of the PIN diode circuit and a second end electrically connected to a reference voltage. The absorber also includes a quarter wave transmission line having a first end electrically connected to the input node at a second end. The quarter wave transmission line has an electrical link that is one quarter of the wavelength of the fundamental frequency. The power absorber also includes a second PIN diode circuit having an input electrically connected to the second end of the quarter wave transmission line and an output electrically connected to the reference voltage. The first choke is provided in parallel with the load resistor.