Double-balanced mixer circuit
AssigneeAlps Electric Co., Ltd.
InventorSadao Igarashi
Life of this patent
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Abstract
A double-balanced mixer circuit includes a diode ring, wherein each side of the diode ring is provided with a stripline to bypass high frequency signals.
Claims15
In a balanced mixer circuit including four diodes arranged generally in the form of a ring with junctions between adjacent diodes, a first balanced transformer connected to two of said junctions spaced oppositely across said ring from one another for supplying radio frequency signals to said mixer, a second balanced transformer connected to the two other of said junctions for supplying signals generated locally to said mixer, and an output leading from said second balanced transformer for providing an intermediate frequency signal, the improvement comprising means including four strip-lines each connected to a respective side of said ring for bypassing signals in the range of said intermediate frequency.
In a balanced mixer circuit including four diodes arranged generally in the form of a ring with junctions between adjacent diodes, a first balanced transformer connected to two of said junctions spaced oppositely across said ring from one another for supplying radio frequency signals to said mixer, a second balanced transformer connected to the two other of said junctions for supplying signals generated locally to said mixer, and an output leading from said second balanced transformer for providing an intermediate frequency signal, the improvement comprising four striplines each connected to a respective side of said ring for bypassing signals in the range of said intermediate frequency, the length of each of said striplines being predetermined to form series circuits each consisting of the inductances of the leads of the respective diodes and the respective stripline and adapted to resonate at a frequency in said range.
Dependencies are inferred from the claim text.