Frequency converting device for RF signals
AssigneeSiemens Aktiengesellschaft
InventorKlaus Otremba
Life of this patent
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Abstract
A frequency converting or mixing device for a receiver, particularly employing hollow conductor or micro strip techniques, including signal and oscillator input means, a diode as a non-linear element, an intermediate frequency output and two stub circuits at the signal input side of the diode, at a mutual distance of approximately one-fourth signal input wave length, for effecting a blocking of currents, of the second harmonic of the oscillator frequency and the summation frequency of the signal input frequency and oscillator frequency, at the diode.
Claims12
In a frequency converting device for a receiver, particularly in hollow conductor, strip line and micro strip techniques, including signal and oscillator input means, a diode as a non-linear element, an input line connecting said input means and said diode, an intermediate frequency output, and blocking circuits in the proximity of the diode for oscillations of the second harmonic of the oscillator frequency as well as the summation frequency of the oscillator frequency and the signal frequency, said blocking circuits comprising a pair of filter elements, each having a length of approximately (.lambda./4) connected to the input line, said elements being spaced a distance of approximately (.lambda./4) apart, for effecting a current blockage of currents of the second harmonic of the oscillator frequency and the summation frequency of the signal frequency and oscillator frequency, at the diode.
Dependencies are inferred from the claim text.