Abstract
A miniaturized ultra-wideband multiple-input multiple-output (UWB MIMO) two-port antenna with high isolation based on FR4 is designed in this article. The size of the antenna is only 18 × 28 × 1.6 mm3. The MIMO antenna consists of two identical antenna elements symmetrically placed on the same dielectric substrate in opposite directions. By loading three crossed X-shaped stubs between two unconnected ground planes, high isolation and good impedance matching are achieved. The working frequency band measured by this UWB MIMO antenna is 1.9–14 GHz, and the isolation is kept above 20.2 dB in the whole analysis frequency band. Good radiation characteristics as well as envelope correlation coefficient (ECC, <0.09), mean effective gain (MEG), and channel capacity loss (CCL) in the passband meet the requirements of the application, which can be applied to the UWB wireless communication system. To verify the applicability of the proposed method for enhancing the isolation between antenna elements, the two-port antenna structure was extended to a four-port antenna structure. In the case of loading the X-shaped stubs to connect to the ground plane, the isolation of the antenna is maintained above 15.5 dB within 1.7–14 GHz.
Highlights
With the rapid development of the wireless communication field, people’s requirements for communication quality and high speed increase
X-shaped stubs are loaded between the ground planes of the antenna elements placed in the opposite direction, and the two intersecting stubs make the antenna structure share the same ground plane. e simulation shows that the isolation of the antenna is maintained above 15.5 dB within 1.7–14 GHz
On the basis of the decoupling principle adopted by the designed twoport UWB multiple-input multiple-output (MIMO) antenna, the adjacent antenna elements are placed orthogonally to expand into a four-port UWB MIMO antenna
Summary
With the rapid development of the wireless communication field, people’s requirements for communication quality and high speed increase . To make the MIMO system work normally, it is necessary to reduce the correlation of the antenna elements in the system [1]. For this reason, several methods for reducing the correlation between elements in an antenna array in a MIMO system have been proposed, for example, defect ground structure decoupling [2, 3], parasitic stub decoupling [4,5,6], neutralization line decoupling [7,8,9], diversity technology decoupling [10,11,12], and electromagnetic band-gap (EBG) structure decoupling [13, 14]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
