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Wide/intermediate frequency MMW (Millimeter Wave) double-balance passive frequency mixer

A passive mixer, millimeter wave technology, applied in the direction of multi-frequency modulation and conversion, can solve the problems of large mixing distortion and small mixing distortion, and achieve the effect of low frequency conversion loss and high isolation.

Inactive Publication Date: 2013-10-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-balanced structure design is relatively simple but the mixing distortion is large, and the double-balanced structure design is relatively complicated but the mixing distortion is small

Method used

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  • Wide/intermediate frequency MMW (Millimeter Wave) double-balance passive frequency mixer
  • Wide/intermediate frequency MMW (Millimeter Wave) double-balance passive frequency mixer
  • Wide/intermediate frequency MMW (Millimeter Wave) double-balance passive frequency mixer

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Embodiment Construction

[0013] see figure 1 , the passive mixer of the present invention includes four mixing NMOS transistors M1, M2, M3, M4, a radio frequency input end Marchand balun 1, a local oscillator input end Marchand balun 2, four inductors L rf1 , L rf2 , L lo1 , L lo2 , two DC blocking capacitors C1, C2, two bias resistors R1, R2 and an active balun; four mixing NMOS tubes are connected to each other to form a differential balanced pair tube, namely: the drain of M1 and the drain of M3 connected, the drain of M2 is connected to the drain of M4; the gate of M1 is connected to the gate of M4, the gate of M2 is connected to the gate of M3; the source of M1 is connected to the source of M2, and the source of M3 Connect to the source of M4. The RF signal is input by the balanced end of Marchand balun 1 and converted into a pair of differential signals at the unbalanced end. The two branches of the unbalanced end of Marchand balun 1 have the same connection method: one end is grounded, and...

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Abstract

The invention discloses a wide / intermediate frequency MMW (Millimeter Wave) double-balance passive frequency mixer. According to the wide / intermediate frequency MMW double-balance passive frequency mixer disclosed by the invention, a transconductance stage of a traditional active double-balanced mixer is replaced by utilizing an inductor and a serial-connection network at an unbalance end of a Marchand Balun which is arranged at a radio frequency input end, and passive frequency mixing is realized; and in addition, a local oscillation signal can be in frequency mixing with a radio frequency signal which is injected from a source electrode through a grid electrode of a frequency mixing transistor subjected to peak inductance injection after being changed into a differential signal through a Marchand Balun at a local oscillation input end.

Description

technical field [0001] The invention relates to a passive mixer, in particular to a millimeter-wave double-balanced passive mixer with a wide intermediate frequency, which can be used for frequency mixing of front-end signals of a 31-45 GHz integrated radio frequency receiver, and needs to generate a wide intermediate frequency of 1-14 GHz. It belongs to the field of radio frequency technology. Background technique [0002] The essence of the analog RF front-end of the wireless transceiver is to complete the function of frequency conversion. The RF front-end of the receiver is to convert the received RF signal into a low-frequency signal, and the RF front-end of the transmitter is to convert the low-frequency signal to be transmitted into a high-frequency signal. , this frequency conversion function is accomplished by the mixer. In the front-end of millimeter-wave receivers, passive mixers have high research and application value due to their advantages of zero power consum...

Claims

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Application Information

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IPC IPC(8): H03D7/16
Inventor 杨格亮王志功李芹李智群
Owner SOUTHEAST UNIV
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