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:
Mar. 06, 2012
Filed:
Oct. 14, 2009
Tracy Scott Martin, Phoenix, AZ (US);
Ruediger Bauder, Feldkirchen-Westerham, DE;
Erin Spivey, Chandler, AZ (US);
Tracy Scott Martin, Phoenix, AZ (US);
Ruediger Bauder, Feldkirchen-Westerham, DE;
Erin Spivey, Chandler, AZ (US);
RF Micro Devices, Inc., Greensboro, NC (US);
Abstract
The present invention relates to a frequency-adjustable radio frequency (RF) isolator that may operate as a bandpass filter when processing RF signals in a forward direction and may operate as a notch filter when processing RF signals in a reverse direction. The notch filter has a notch frequency, which is adjustable to provide adequate isolation from reflected signals at a specific operating frequency. The frequency-adjustable RF isolator may include an electro-magnetic gyrator coupled to a variable impedance circuit, which may present a variable impedance to the electro-magnetic gyrator. The notch frequency may be dependent on the variable impedance. The notch filter may be a single-notch filter or may be a multiple-notch filter.