Filter arrangement, associated antenna arrangement and wireless device and associated filtering method

A filter and antenna unit technology, applied in antennas, waveguide devices, resonators, etc., can solve the problems of signal integrity limitation, signal separation far away, etc., to avoid combination effect, increase Q factor, and good recognition Effect

Active Publication Date: 2022-04-01
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The signal integrity aspect also limits the possibilities because the signals cannot be separated very far and because it is difficult to fit a sufficient number of ground connections in the small cell defined by the antenna

Method used

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  • Filter arrangement, associated antenna arrangement and wireless device and associated filtering method
  • Filter arrangement, associated antenna arrangement and wireless device and associated filtering method
  • Filter arrangement, associated antenna arrangement and wireless device and associated filtering method

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Embodiment Construction

[0040] Using PCB technology, resonant cavities can be realized by electromagnetically shielding parts of the PCB. By connecting a number of such resonant cavities together by holes or openings in the shield, a filtering function can be obtained in the PCB material. The hole in the topmost metallization layer can be configured as an antenna element. In this way, the filter and antenna elements can be integrated and share the same footprint on the PCB.

[0041]In this paper an integrated filter-antenna arrangement is proposed which provides both filtering and broadband matching functions for the antenna unit. The resonator types used for the filters are substrate-integrated waveguides or substrate-integrated cavities for TE201 and TE102 modes. They have better Q factors and are less sensitive to manufacturing tolerances than traditionally designed components in filters for antenna functions. By using TE201 and TE102 degeneracy, it is also possible to support two orthogonal po...

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PUM

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Abstract

A filter arrangement comprising three or more stacked metallization layers separated by printed circuit board PCB layers. Each metallization layer includes holes. The filter arrangement includes a plurality of vias extending through the stacked metallization layers and through the spaced apart layers of dielectric material, whereby the vias and the metallization layers define a cavity in each layer of dielectric material. The cavities in two successive layers of dielectric material are coupled by holes in a single metallization layer separating the two successive layers of dielectric material. The holes of the topmost metallization layer are arranged as antenna elements. The filter device comprises a conduit arranged to connect the at least one layer of dielectric material to the outside of the filter device.

Description

technical field [0001] The present disclosure relates to a filter device having metallization layers separated by layers of dielectric material. The filter arrangement may be integrated with the antenna unit for use in a wireless device. Background technique [0002] An antenna unit is a device configured to transmit and / or receive electromagnetic signals, such as radio frequency (RF) signals for wireless communication. A phased antenna array is an antenna comprising multiple antenna elements whereby the antenna radiation pattern can be controlled by varying the relative phase and amplitude of the signals fed back to the different antenna elements. [0003] The practical implementation of the signal filtering function of such an antenna unit is a challenging task. A high Q value, multiple resonators, and high precision are required to realize a filter with low loss and strong rejection of frequencies near the operating band where radio frequency (RF) power interference or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/208
CPCH01P1/208H01P1/2088H01P7/06H01Q15/24H01Q19/005H01Q21/005
Inventor A·德莱尼夫O·塔格曼
Owner TELEFON AB LM ERICSSON (PUBL)
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