Wideband MMIC amplifier

Abstract

The invention discloses a wideband MMIC amplifier. The wideband MMIC amplifier comprises a first PHEMT pipe P1, a second PHEMT pipe P2 and a third PHEMT pipe P3; the grid of the first PHEMT pipe P1 isconnected with a signal input end of the MMIC amplifier through an input matching network T0, the source of the first PHEMT pipe P1 is grounded through a first resistor; two ends of the first resistor R1 are connected with a first capacitor C1 in parallel; the drain of the first PHEMT pipe P1 is connected with the grid of the second PHEMIT pipe P2 through a first inter-electrode matching networkT1, the source of the second PHEMT pipe P2 is grounded through the second resistor R2; two ends of the second resistor R2 are connected with the second capacitor C2 in parallel; the drain of the second PHEMT pipe P2 is connected with the grid of the third PHEMT pipe P3 through a second inter-electrode matching network T2; the source of the third PHEMT pipe P3 is grounded through the third resistor, two ends of the third resistor R3 are connected with the third capacitor C3 in parallel, and the drain of the third PHEMT pipe P3 is connected with the signal output end of the MMIC amplifier through an output matching network T3. The invention provides the wideband MMIC amplifier, and has the advantages of being high in gain, low in standing wave and low in noise.

Description

technical field [0001] The invention relates to the communication field, in particular to a broadband MMIC amplifier. Background technique [0002] In the field of communication, systems such as radar and microwave measurement require broadband MMIC amplifiers. In the design of MMIC amplifiers, there are three main ways to increase bandwidth: balanced amplifiers, feedback amplifiers, and traveling wave amplifiers. The frequency band of balanced amplifiers is only It can achieve frequency multiplication or slightly wider; the feedback amplifier is easy to achieve matching within the broadband, but the gain is deteriorated; the traveling wave amplifier can obtain 10-octave frequency amplification, but its DC power consumption is large and the reliability is low; the above Commonly used broadband amplifier design methods have their own advantages and disadvantages, and it is difficult to take into account the gain, standing wave, noise and other indicators. Contents of the in...

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Problems solved by technology

[0002] In the field of communication, systems such as radar and microwave measurement require broadband MMIC amplifiers. In the design of MMIC amplifiers, there are three main ways to increase bandwidth: balanced amplifiers, feedback amplifiers, and traveling wave amplifiers. The frequency band of balanced amplifiers is only It can achieve frequency multiplication or slightly wider; the feedback amplifier is easy to achieve matching within the broadband, but the gain is deteriorated; the traveling wave amplifier can obtain 10-octave frequency amplification, but its DC power consumption is large and the reliability is low; the above Commonly used broadband amplifier design methods have their own advantages and disadvantages, and it is difficult to take into account the gain, standing wave, noise and other indicators

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