Frequency-adjustable radio frequency isolator circuitry
US8130054B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2009 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Aug 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.