Tunable directional power combiner
US8508296B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2011 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Nov 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21157
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A quadrature amplifier comprises first and second amplifiers, each having an input and an output, a signal splitter connected to the inputs of the two amplifiers, a signal combiner connected to the outputs of the two amplifiers, and an impedance transformer connected to the output of the signal combiner. The signal splitter is a −3 dB hybrid that splits an input signal into two output signals of equal amplitude that are in phase quadrature. The signal combiner is a −3 dB hybrid that combines the output signals at the outputs of the two amplifiers. Since the output signals are in phase quadrature, the signals are combined to produce an inphase signal. The impedance transformer matches the output signal to an impedance of approximately 50 Ohms. Capacitive and resistive tuning networks connected to the ports of the signal combiner allow for adjustment of the center frequency and impedance of the signal combiner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.