| 摘要 |
PURPOSE:To improve the noise characteristic by applying electromagnetic field coupling to a transmission line connecting to a frequency converting diode via a dielectric resonator resonated to an input signal and a local oscillation signal. CONSTITUTION:An input signal input microstrip line 2 and a local oscillation input microstrip line 3 are constituted onto the dielectric base 1 and an input signal frequency band pass filter 4 and a local oscillation frequency band-pass filter 5 comprising plural dielectric resonators 11, 12, 13 are arranged between the lines. Moreover, a coupling microstrip line 6 is arranged between the filters 4 and 5. A mixer diode 7 is connected to one end of the line 6 and an intermediate frequency band filter 14 is connected to the other end of the diode 7. Thus, the coupling position of the resonators 12, 13 and the line 6 is adjusted independently and the frequency conversion with excellent noise is attained.
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