NDLI: Compact SIW cavity MIMO antenna with enhanced bandwidth and high isolation

Content Provider	IET Digital Library
Author	Niu, Bing Jian Tan, Jie Hong
Abstract	A compact substrate-integrated-waveguide (SIW) cavity multiple-input–multiple-output (MIMO) antenna with enhanced bandwidth and high isolation is proposed. It is based on a triangle half-mode SIW cavity with one open edge and two edges shorted by metallic vias. By etching three slots, the single cavity can be divided into four eighth-mode sub-cavities. Two large sub-cavities with the same size are excited by two coaxial ports to construct two antenna elements and a wide slot between them is utilised as the de-coupler. Therefore, high isolation can be obtained. On the other hand, cavity energy can be coupled from the excited sub-cavities to the unexcited sub-cavities due to two narrow T-shaped slots serving as the couplers. Therefore, enhanced bandwidth can be achieved by merging two coupled modes into the required operating band. A fabricated prototype centring at 3.51 GHz has been measured. With a compact size of 0.59λ0 × 0.59λ0, enhanced bandwidth of 160 MHz, high isolation of 19.5 dB, the antenna gain of 4.9 dBi, and radiation efficiency of 72.8%, the proposed design has potential applications for fifth-generation communication.
Starting Page	631
Ending Page	632
Page Count	2
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 11, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/11
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.0838
Journal	Electronics Letters
Publisher Date	2019-04-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Antenna Element Antenna Gain Antenna Radiation Pattern Bandwidth 160.0 MHz Cavity Energy Coaxial Ports Compact SIW Cavity MIMO Antenna Compact Size Coupled Modes De-coupler Efficiency 72.8 Percent Eighth-mode Sub-cavities Enhanced Bandwidth Etching Excited Sub-cavities Fifth-generation Communication Frequency 3.51 GHz General Fabrication Technique Metallic Vias MIMO Communication Narrow T-shaped Slot Open Edge Radio Link And Equipment Single Cavity Slot Antenna Array Slot Etching Substrate Integrated Waveguide Substrate-integrated-waveguide Cavity Multiple-input–multiple-output Antenna Triangle Half-mode SIW Cavity Unexcited Sub-cavities Waveguide And Microwave Transmission Line Component Waveguide Couplers Wide Slot
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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