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Cavity-backed drum-shaped slot broadband antenna based on a substrate integrated waveguide

A substrate-integrated waveguide and broadband antenna technology, applied in slot antennas, circuits, etc., can solve problems such as low bandwidth and achieve the effect of bandwidth expansion

Pending Publication Date: 2021-11-05
CHINA JILIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The cavity-backed slot antenna is proposed, and its radiation performance and gain are good, but because the substrate is very thin, which is much smaller than a quarter of the space wavelength of the traditional cavity-backed slot antenna, the bandwidth is relatively low

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  • Cavity-backed drum-shaped slot broadband antenna based on a substrate integrated waveguide
  • Cavity-backed drum-shaped slot broadband antenna based on a substrate integrated waveguide
  • Cavity-backed drum-shaped slot broadband antenna based on a substrate integrated waveguide

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Embodiment Construction

[0015] The preferred embodiment of the present invention is explained in greater detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more readily understood by those skilled in the art, in order to make more clearly the scope of clearly defined in the present invention.

[0016] figure 1 It is based on a substrate integrated waveguide cavity backed broadband slot antenna structure of the drum shown in FIG. Comprising: the antenna comprises two major portion of the substrate integrated waveguide cavity and the feed structure, wherein the inner surface of the cavity metal etching drum shape of the slot, a set of circular cavities damascene metal via. Using the common feed structure 50 ohm impedance of a coplanar waveguide, and a portion of the external microstrip line antenna test easily.

[0017] Size parameter specific embodiment of the present invention as an antenna Figure 5 Indicated.

[0018] figure ...

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Abstract

The invention discloses a cavity-backed drum-shaped slot broadband antenna based on a substrate integrated waveguide, and belongs to the technical field of wireless communication. The antenna comprises two main parts, namely a substrate integrated waveguide cavity and a feed structure, a drum-shaped gap is etched on the metal surface of the cavity, and a group of circular metal through holes are embedded in the cavity. By adopting the drum-shaped special gap and a group of interference through holes, the antenna simultaneously excites three cavity resonance modes in a substrate integrated waveguide cavity, so that the input impedance bandwidth of the antenna is expanded, the relative bandwidth reaches 22.9%, and the maximum gain in a working frequency band (8.9-11.19 GHz) is 6.48 dBi. In order to enable the antenna to be applied in a planar circuit structure, the antenna adopts a single-layer Rogers RT / Duroid 5880 substrate structure. The antenna has the characteristics of broadband, low manufacturing cost, easiness in integration with a planar circuit and the like, and is suitable for a broadband wireless communication environment.

Description

Technical field [0001] The present invention relates to the field of wireless communication technologies, particularly to a substrate based integrated waveguide cavity backed broadband slot antenna drum. Background technique [0002] In the development of the communication system, the size, loss, bandwidth and cost characteristics of the assembly is important to the design of communication systems. Role of the antenna in the electromagnetic wave conversion or reversely from the circuit to play an important space. Cavity-backed slot antenna and microstrip antenna due to the respective advantages of being widely used in many fields. However, the conventional cavity-backed slot antenna volume, high cost, low-power microstrip antenna capacity loss and large defects limit its further application. [0003] Based on substrate integrated waveguide (the SIW) cavity backed slot antenna with its small size, large power capacity, can be integrated with other planar circuits advantages favore...

Claims

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Application Information

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IPC IPC(8): H01Q13/10
CPCH01Q13/10
Inventor 肖丙刚王振
Owner CHINA JILIANG UNIV
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