Radio-frequency filter and radio-frequency multiplexer

Abstract

The invention discloses a radio-frequency frequency filter and a radio-frequency multiplexer. The radio-frequency filter comprises a sound wave rejector chip used for filtering received signal, passive device miscellaneous function network connected with the sound wave rejector chip, the pass device miscellaneous function is used for improving the quality of the filter or achieving a transferring function of port impedance. The passive device miscellaneous function is made through a passive device insertion phase delay (IPD). The passive device miscellaneous function is made through the passive device technique, the radio-frequency filter is composed by different combination ways between the passive device miscellaneous function network and the sound wave rejector chip so as to improve the integration level of the device, reduce occupied area, reduce the volume of a product and avoid the installation of the passive device on a packaging basement of a load-bearing substrate, and therefore, complicated multilayer design of the substrate can be avoided so that complexity and cost of the design and manufacture of the substrate can be lowered.

Description

technical field [0001] The present invention relates to the field of packaging of electronic devices, and in particular, to a radio frequency filter and a radio frequency multiplexer. Background technique [0002] With the rapid development of wireless communication systems, a large number of modules with different functions are designed and installed in hand-held mobile devices with strictly limited volume. At the same time, increasingly crowded frequency resources make the guard intervals between different communication frequency bands narrower and narrower. Under this development trend, in order to ensure that each module in the system can work normally and do not affect each other, higher requirements will be placed on the various components of communication equipment. For example, the RF front-end must be miniaturized and integrated. development in the direction of globalization, high performance, low power consumption and low cost. Generally speaking, RF filter modul...

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Problems solved by technology

[0006] Aiming at the problems of large volume and high cost of the radio frequency circuit in the related art, the present invention proposes a radio frequency filter and a radio frequency multiplexer, which can improve the integration degree of the device, reduce the occupied area, reduce the volume of the product, and effectively control the cost

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