| 摘要 |
An equalizer for compensating distortion of group delay and ripple in a high frequency device is provided to enable a band pass filter to have a slope opposite to characteristics of the group delay and ripple through at least one resonator and a circulator. An input port(201) is input with a high frequency signal from a communication system or base station, and the signal input in the input port is passed in one direction by a first circulator(202). The signal is resonated to have given frequency characteristics and group delay characteristics. A second circulator(207) receives the signal from the resonator to output it to an output port(208). The first and second circulators are composed of three asymmetric terminals to transmit the signal to only adjacent terminal. |
