Laminated media filter

Abstract

A laminated dielectric filter having improved edge characteristics to move an attenuation pole toward a transmission band while maintaining the same bandwidth of the transmission band, comprising: a dielectric block stacked with a plurality of dielectric films; a ground electrode formed on the dielectric block on the front and rear sides; input and output electrodes formed on both sides of the dielectric body to be separated from the ground electrode; an inductor pattern having two parts placed in parallel with the resonator pattern connected to the input and output electrodes and connecting the two Partially connected connection parts are used to generate inductive coupling with the resonator pattern connected to the input and output electrodes to improve filter response characteristics by adjusting the inductive coupling.

Description

[0001] Cross References to Related Applications [0002] This application claims Patent Application No. 2002-22642 filed with the Korean Intellectual Property Office on April 25, 2002, the disclosure of which is hereby cross-referenced technical field [0003] The present invention relates to a laminated dielectric filter, and more particularly, to a laminated dielectric filter capable of improving a skirt characteristic of a resonance frequency by controlling a generation position of a resonance point according to electronic coupling between resonators. Background technique [0004] According to recent developments in radio wave technology, demands for wireless communication devices or mobile communication terminals have increased. The characteristics of these wireless devices depend on the filtering characteristics of the filters used in the wireless devices. [0005] Filters for filtering radio waves are classified into surface acoustic wave filters and dielectric filter...

AI Technical Summary

Problems solved by technology

[0014] If the number of resonators increases, insertion loss occurs due to the increase in the number of resonators, and there is a limit to increasing the number of filter parts within a limited dielectric body size

[0015] Although the method of forming the attenuation pole near the transmission frequency band can increase the edge characteristics without increasing the number of filter sections, an additional circuit is required to form the attenuation pole, thus causing complexity of the filter circuit

[0016] In addition, if the laminated dielectric filter is miniaturized, coupling generated between circuit patterns inserted into the dielectric body to form an attenuation pole is generated to destroy the filter characteristics of the laminated dielectric filter

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