An active inductor that can work in the ku-band

Abstract

An active inductor capable of operating in a Ku-band, comprising a first Q-enhanced transconductor unit (1), a second Q-enhanced transconductor unit (2), and a first adjustable input unit (3) , the second adjustable input unit (4). Wherein, the first Q-enhanced transconductor unit (1) is connected in series with the first adjustable input unit (3) to form a first-stage impedance transformation circuit, and the second Q-enhanced transconductor unit (2) is connected with the second The adjustable input unit (4) is connected in series to form a second-stage impedance transformation circuit, and the first-stage impedance transformation circuit is cascaded with the second-stage impedance transformation circuit, so that the total equivalent capacitance of the active inductor is reduced, and the number of impedance transformations is increased, Finally, an active inductor with high Q value and large inductance value, which can work in the Ku band, is obtained.

Description

technical field [0001] The invention relates to the field of radio frequency devices and radio frequency integrated circuits, in particular to an active inductor that can work in Ku band. Background technique [0002] In recent years, wireless communication systems have developed rapidly. Ku-band microwave has gradually become the development direction of wireless communication systems such as satellite communication and microwave relay systems due to its wide spectrum range, narrow beam, straight-line propagation, all-weather operation, and high radiation antenna gain. It is required that its functional module / unit will also work in the Ku-band, and the inductor is one of the common components in the module / unit, so it must also work in the Ku-band. [0003] The most commonly used inductive element today is the on-chip passive spiral inductor, constructed with metal wires, whose inductance value (L), quality factor (Q), and resonant frequency (fs) are inherently related to ...

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Problems solved by technology

[0004] At present, the existing active inductors have simple circuit components and insufficient coordination of each unit, resulting in fewer impedance transformation times, small inductance values, and low Q values; in addition, the equivalent capacitance is also large, and the operating frequency is low. In the Ku-band In, even non-inductive performance, which limits its application in high-performance radio frequency integrated circuits

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