| 摘要 |
PURPOSE:To obtain a low-cost frequency multiplier which operates with high efficiency and high stability in a high frequency band by utilizing the nonlinearity of a field effect transistor (FET). CONSTITUTION:A basic signal is inputted through a matching circuit MC1 and a signal obtained by reflecting the doubled-wave signal by a filter BRF1 is inputted to a common source FET. The FET outputs a higher harmonic component of the basic signal by its non-linearity. A filter BRF2 which reflects the basic wave signal is provided at a position which is 0.1-0.3lambdag (lambdag: wavelength of basic wave) out of phase with the output terminal (drain), and a basic wave component outputted from the FET is mixed in opposite phase for cancellation. Then, the output of the filter BRF2 is applied to a matching circuit MC2 which matches with the doubled-wave signal to obtain a specific doubled-wave signal. Thus, the low-cost frequency multiplier which operates with high efficiency and high stability in a high frequency band is obtained. |
