Zero intermediate frequency receiver based on FBAR (Film Bulk Acoustic Resonator) and wireless communication transceiver

A zero-IF receiver and antenna technology, which is applied in baseband system components, DC level restoration devices/bias distortion correction, electrical components, etc., can solve the problems of large receiver power consumption and large DC deviation, and achieve reduction area, the effect of eliminating DC deviation

Inactive Publication Date: 2010-07-28
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a zero-IF receiver and wireless communication tr

Method used

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  • Zero intermediate frequency receiver based on FBAR (Film Bulk Acoustic Resonator) and wireless communication transceiver
  • Zero intermediate frequency receiver based on FBAR (Film Bulk Acoustic Resonator) and wireless communication transceiver
  • Zero intermediate frequency receiver based on FBAR (Film Bulk Acoustic Resonator) and wireless communication transceiver

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Embodiment Construction

[0031] Embodiments of the present invention: the present invention is as figure 2 Shown. The zero-IF receiver 100 based on FBAR comprises an antenna 101, an FBAR duplexer 102 and a low-noise amplifier LNA103 connected in sequence, and the output of the low-noise amplifier LNA103 is divided into two with the in-phase signal path I and the quadrature signal path Q respectively. The radio frequency input terminal of the middle and lower converter 104 is connected, and the local oscillator 109 is connected with the lower converter 104 in the in-phase signal path I, and is connected with the lower converter 104 in the quadrature signal path Q through a 90° phase shift device 108, that is The local oscillator signal LO generated by the local oscillator 109 is applied to the local oscillator input of the down-converter 104 included in the in-phase signal path I, and is added to the down-converter included in the quadrature signal path Q through the 90° phase shift device 108. The l...

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Abstract

The invention discloses a zero intermediate frequency receiver based on an FBAR (Film Bulk Acoustic Resonator) and a wireless communication transceiver. The receiver (100) comprises an antenna (101), an FBAR duplexer (102) and a low-noise amplifier LNA (103). An output end of the low-noise amplifier LNA is divided into two parts which are respectively connected with a radio frequency input end of a lower frequency converter (104) in an in-phase signal path I and an orthogonal signal path Q; a local oscillator (109) is connected with the lower frequency converter (104) in the in-phase signal path I and is connected with the lower frequency converter (104) in an orthogonal signal path Q through a 90-degree phase shift device (108); and the in-phase signal path I and the orthogonal signal path Q further comprise a lower frequency converter (104), a transformer (105), a low-pass filter (106) and a variable gain amplifier (107). The wireless communication transceiver comprises a zero intermediate receiver (100) based on the FBAR and a transmitter (116).

Description

technical field [0001] The invention relates to a zero-IF receiver and a wireless communication transceiver, belonging to the technical field of radio frequency wireless zero-IF receiver integrated circuits. Background technique [0002] In recent years, with the development of wireless communication and semiconductor technology, technologies such as 3G, wireless local area network (WLNA), CDMA, W-CDMA, and Bluetooth (Bluetooth) have emerged continuously. Since the radio frequency receiver is at the forefront of wireless communication, its structure and performance directly affect the entire communication system, so higher requirements are put forward for the radio frequency receiver used in these communication technologies. There are mainly two types of receivers in practical applications: superheterodyne receivers and zero-IF receivers. [0003] The superheterodyne receiver mainly mixes the signal frequency and the local oscillator frequency into an intermediate frequency...

Claims

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Application Information

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IPC IPC(8): H04B1/30H04B1/40H04L25/06
Inventor 曾国勇董树荣张慧金孙光照赵焕东王一雷
Owner ZHEJIANG UNIV
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