Front end module

A front-end module and input terminal technology, which is applied in the field of front-end modules, can solve the problems of degrading the performance of the receiving unit, making it difficult to minimize mobile communication equipment, and mixing phase noise.

Inactive Publication Date: 2007-03-21
LG INNOTEK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, it is difficult to minimize the size of a mobile communication device mounted with a multi-chip module (MCM)
[0017] Second, traditional FEMs have a variety of issues with overall operational functionality
However, when the VCO is designed in a single-block manner according to the prior art, phase noise is mixed in, thus deteriorating the performance of the receiving unit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0075] The FEM according to the first embodiment of the present invention will now be briefly described.

[0076] FIG. 2 is a block circuit diagram of a FEM according to a first embodiment of the present invention.

[0077] Referring to FIG. 2 , the FEM according to the first embodiment of the present invention includes: a duplexer 300 , a receiver 400 and a transmitter 500 . The receiver 400 includes: a radio frequency (RF) receiving unit 410, the radio frequency (RF) receiving unit 410 has a low noise amplifier (LNA) 412 and a receiving bandpass filter (RxBPF) 414; an intermediate frequency (IF) receiving unit 420, the intermediate frequency The (IF) receiving unit 420 has a first mixer 422 and a first phase-locked loop circuit 424 and a first IF filter 426 ; and a reception processing unit 430 .

[0078] The transmitter 500 includes: an RF transmit unit 510 having a PAM 512 and a transmit bandpass filter (Tx BPF) 514; an IF transmit unit 520 having a second mixer 522 and a...

no. 2 example

[0112] Fig. 5 is a block circuit diagram of a FEM according to a second embodiment of the present invention.

[0113] Referring to FIG. 5 , the FEM according to the first embodiment of the present invention includes: a duplexer 300 , a receiver 400 and a transmitter 500 . The FEM of the second embodiment is similar to the first embodiment.

[0114] Compared with the first embodiment of the present invention, the second embodiment of the present invention further comprises: an inductor 110 connected to the antenna terminal of the duplexer 300 , and a load switch 220 connected to the PAM 512 .

[0115] Referring to FIG. 5 , load switch 220 acts as an amplifier for turning on or off PAM 512 .

[0116] The load switch 220 may be configured as a discrete switching device, or may be configured as a switching circuit having a resistor, a switching transistor, a capacitor and a diode.

[0117] The load switch 200 receives the control signal of the baseband processing unit 600, and t...

no. 3 example

[0166] A FEM according to a third embodiment of the present invention will now be described. The FEM according to the third embodiment of the present invention is a communication module having a diversity receiving unit, which is installed in a mobile communication device, and handles communication using the CDMA 1xEV-DO standard.

[0167] Fig. 17 is a schematic block diagram of a FEM according to a third embodiment of the present invention.

[0168] Referring to FIG. 17, the FEM 190 according to the third embodiment of the present invention includes: a duplexer 105, a PAM 111, a transmit filter 115, a transmit processing unit 130, a first receive filter 120, a second receive filter 121, a first The receiving processing unit 140 , the second receiving processing unit 150 and the GPS filter 125 . These components are manufactured as discrete components and mounted in MCMs.

[0169] The MCM mounting structure will be described later with reference to FIG. 18 .

[0170] The du...

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Abstract

A front end module having a multilayered structure is provided. The front end module includes a transmitter, a receiver, and a duplex unit. A ground layer is provided with an ground pattern having a plurality of separated blocks on a surface of a substrate of the front end module.

Description

technical field [0001] The present invention relates to front-end modules used in mobile communication devices. Background technique [0002] A front-end module (FEM) is a transmitting / receiving device for controlling electric wave signals used in mobile communication equipment. FEMs are composite components on which multiple electronic components are mounted on a single substrate. [0003] A conventional FEM for handling Code Division Multiple Access (CDMA) will now be illustrated. [0004] Fig. 1 is the circuit block diagram of traditional CDMA FEM. [0005] Referring to FIG. 1 , a conventional CDMA FEM includes a duplexer 20 , a receiver 30 and a transmitter 40 . Transmitter 40 includes a transmit processing module 46 (Tx BBA or RF transmitter), a transmit filter 44 and a power amplifier module (PAM) 42 . The receiver 30 includes a low noise amplifier (LNA) 32, a receive filter 34 and a receive processing block 36 (Rx BBA or RF receiver). [0006] The duplexer 20 sep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B7/26
CPCH01Q1/242H01Q1/48H04B1/3833
Inventor 金炅俊南亨沂李源圭
Owner LG INNOTEK CO LTD
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