Ka-waveband broadband up-converter

Abstract

The invention discloses a Ka-waveband broadband up-converter which is applied to the field of electronic circuit design. The Ka-waveband broadband up-converter comprises a first part circuit composedof an active single-ended to differential circuit and an adjustable load circuit, and a second part circuit composed of a Gilbert unit, a local oscillator input matching network and a radio frequencyoutput matching network. The active single-ended to differential circuit is used for converting a single-ended signal of the broadband up-converter into a differential signal; the adjustable load circuit is used for adjusting circuit asymmetry caused by the active single-ended to differential circuit; the local oscillator input matching network is used for converting the input single-ended signalinto the differential signal to realize broadband matching; the Gilbert unit is used for converting an intermediate-frequency voltage differential signal into an intermediate-frequency current signaland then mixing the intermediate-frequency current signal with a local oscillation signal; and the radio frequency output matching network is used for realizing broadband output matching and performing differential-to-single-ended output. Through the active single-ended to differential circuit, the local oscillator input matching network and the radio frequency output matching network, three-portsingle-ended input and output are realized.

Description

technical field [0001] The invention relates to the field of electronic circuit design, in particular to a Ka-band broadband up-converter. Background technique [0002] With the rapid development of communication technology, the requirements for communication networks in various scenarios are getting higher and higher. In densely populated areas such as cities and towns, communication is carried out through cellular networks, and communication in inaccessible places such as deserts, Gobi, and mountains requires satellite communication. . As a complementary technology to cellular networks, satellite communication technology is characterized by using satellites as relay stations to forward signals. The coverage area of ​​a satellite is wider than that of a ground base station. A satellite can theoretically cover 40% of the earth's area. The frequency can reach dozens of GHz, and the transmission rate is fast. The Ka-band is often used for satellite communications. It has a h...

AI Technical Summary

Problems solved by technology

In the CMOS design process, the existing up-converter usually uses a double-balanced mixer, and the IF, RF, and LO ports are usually differential ports, and the low-IF ports are often narrow-band ports, which adds to the surrounding circuit design. It increases the complexity and limits the bandwidth range of low-IF

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