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Stacked patch antenna using a dielectric substrate with patterned cavities

An antenna and pattern technology, applied in the field of stacked patch antennas using a dielectric substrate with a patterned cavity, can solve problems such as narrowing bandwidth, and achieve the effects of widening operating bandwidth, reducing weight, and changing bandwidth

Active Publication Date: 2022-05-24
NOVATEL INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of ceramics as the substrate reduces the size of the antenna, but as a significant disadvantage it also narrows the bandwidth, because according to the Chu-Harrington limit for electrically small antennas, the quality factor Q of a resonant antenna is inversely proportional to the volume it physically occupies

Method used

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  • Stacked patch antenna using a dielectric substrate with patterned cavities
  • Stacked patch antenna using a dielectric substrate with patterned cavities
  • Stacked patch antenna using a dielectric substrate with patterned cavities

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Embodiment Construction

[0019] According to an exemplary embodiment of the present invention, the bandwidth of an exemplary ceramic antenna is designable and flexible. Exemplarily, this is achieved by molding a ceramic having a perforated cavity and using the perforated ceramic as a substrate for an exemplary patch antenna. The reason for perforation into a cavity (cavity) rather than a hole (hole) is to keep the top surface of the ceramic unaffected, so that the same metallization process as conventional non-perforated ceramics may be used according to exemplary embodiments of the present invention.

[0020] Figure 1 is an exemplary side view of an exemplary embodiment of the present invention double stacked smd antenna 100. The double stacked chip antenna 100 exemplary comprises a first metal layer 105, a first ceramic layer 110, a second metal layer 115 and a second ceramic layer 120. Exemplarily, the first metal layer is disposed on the top surface of the first ceramic layer 110. The second metal la...

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Abstract

The GNSS RHCP stacked patch antenna with wide dual-band, high efficiency and small size is made of molded high permittivity materials such as ceramics with patterned cavities in a dielectric substrate. Perforated cavities in the substrate reduce the effective dielectric constant, increasing bandwidth and efficiency. With this cavity design, higher-order modes can be manipulated.

Description

Background [0001] Patch antennas are often used as discreet, low-cost multi-constellation global navigation satellite system (GNSS) antennas due to their planar construction and ease of integration with circuit boards. In order to reduce the size of the antenna, it is well known in the art to use a ceramic material as a substrate. Typical considerations for the use of ceramics are their high DK (ε', dielectric constant) and lower dielectric losses. Depending on the compound and compound, the DK of the ceramic can vary in the range of about 4 to hundreds. To meet the dual-band requirements of a typical GNSS system, two or more stacked patches are required to resonate at each frequency. For circular patches, the base mold for operation is TM11 mode, which has an upper hemisphere radiation pattern that is ideal for GNSS applications. Using the well-known cavity model, the resonant frequency of this base mold is given by the following equation [0002] [0003] where χ 11 Represents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q9/04H05K1/03H05K3/42G01S19/36
CPCH01Q9/0414H01Q1/38H01Q9/04
Inventor 杨宁
Owner NOVATEL INC