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Micro reconfigurable electrical tunable electromagnetic band gap filter

An electromagnetic bandgap and filter technology, applied in resonators, waveguide devices, circuits, etc., can solve problems such as unfavorable system integration

Inactive Publication Date: 2017-09-01
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size of this type of filter is often larger than the sum of the sizes of the single-band filters, which is not conducive to system integration

Method used

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  • Micro reconfigurable electrical tunable electromagnetic band gap filter
  • Micro reconfigurable electrical tunable electromagnetic band gap filter
  • Micro reconfigurable electrical tunable electromagnetic band gap filter

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specific Embodiment approach

[0064] The invention also provides a dual-band filter based on the EBG substrate, which is formed by combining two single-band filters through a group of externally connected capacitors. The dual-band EBG filter is implemented based on two-layer PCB technology, where two single-band filters are based on Figure 1a -d, Figure 2a -d with image 3 The filter shown is designed. The dual-band EBG filter achieves the expected performance by improving the operating frequency selectivity, isolation between passbands and size. By sharing the EBG substrate, both single-band filters can store more electromagnetic field energy (with a higher Q value) than if the substrates were divided equally. In addition, the introduction of two sets of external capacitors enables the design of a single filter structure without interfering with each other. By tuning the corresponding capacitor values, the operating frequency of each passband of the filter can be precisely adjusted. The dual-band fi...

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Abstract

The invention provides an electromagnetic band gap (EBG) substrate-based resonator / filter. A top layer metal plate, a bottom layer metal plate, a middle dielectric layer, periodical metal columns and an external control network which consists of a series of resonator / filter working frequency control elements are included, wherein the periodically-arranged metal columns are embedded in the dielectric layer to form the periodical EBG substrate; an energy coupling structure designed on the top layer metal plate consists of coplanar waveguide and groove lines; and the frequency control elements can be built in or externally connected with a capacitor, and are connected with a central metal column to jointly form a resonant network to realize frequency tuning. On the basis, a dual-passband filter is also provided; the dual-passband filter comprises two or more EBG substrate-based single-band filters, and the external control network which consists of a series of frequency control elements. The single-band filters share the EBG substrate, so that miniaturization and high performance of the filter are realized.

Description

technical field [0001] The invention belongs to a cavity resonator / filter for processing electromagnetic signals (usually radio frequency signals), in particular to a cavity resonator / filter based on an EBG substrate, including a series of resonator / filter operating frequency control An external control network composed of components. The present invention further relates to a dual-band filter based on an EBG structure, including two or more single-band filters and an external control network. Background technique [0002] Multi-band resources in wireless communication are widely used in communication devices such as smartphones and tablet computers. Taking the communication system in the mobile phone as an example, it needs to support Wifi, Bluetooth, GSM, LTE and other communication standards at the same time to meet people's increasing wireless application needs. Small bandpass RF / microwave filters supporting multiple frequency bands have become important devices to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/208H01P7/06
CPCH01P1/208H01P7/065
Inventor 郭瑜张景辉李岱林余涛
Owner JIANGNAN UNIV
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