Abstract
A wideband three-port equilateral triangular (ET) patch antenna capable of generating three uncorrelated broadside-radiation waves for 5G MIMO access-point application is presented. The three-port ET patch antenna has a simple structure for easy implementation. To our best knowledge, using a simple ET patch antenna to generate three uncorrelated waves for MIMO application is reported for the first time. The ET patch is mounted 11.5 mm above the ground plane and has three L-strip capacitive feeds placed below the patch’s three triangular tips. Three isolated fundamental TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> modes polarized in three different directions can be excited to generate three uncorrelated waves at the same time. With a patch length of only 38 mm ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.48\lambda $ </tex-math></inline-formula> at 3.75 GHz), the three-port ET patch antenna covers 3.3-4.2 GHz (5G N77 band) with impedance matching < −10 dB and port isolation >15 dB. Details of the three-port ET patch antenna are presented.
Highlights
The wideband three-port patch antenna capable of generating three uncorrelated broadside-radiation waves has recently been reported for 5G mobile communication applications [1][3]. Such wideband three-port antennas are applicable as a building unit to achieve compact multi-input multi-output (MIMO) antenna arrays for outdoor base stations [1], [2] or indoor access points [3]
With an all-metal structure to avoid the substrate issues as shown in [1], [2], the multi-port patch antenna will be more attractive for practical MIMO antenna applications
We present a wideband three-port equilateral triangular (ET) patch antenna to generate three uncorrelated broadside-radiation waves over a wide band of 3.3-4.2 GHz for 5G MIMO access-point application
Summary
The wideband three-port patch antenna capable of generating three uncorrelated broadside-radiation waves has recently been reported for 5G mobile communication applications [1][3]. With an all-metal structure to avoid the substrate issues as shown in [1], [2], the multi-port patch antenna will be more attractive for practical MIMO antenna applications. We present a wideband three-port equilateral triangular (ET) patch antenna to generate three uncorrelated broadside-radiation waves over a wide band of 3.3-4.2 GHz for 5G MIMO access-point application. In [19], the use of three separate ET patch antennas to generate three broadside-radiation waves for MIMO operation has been studied. It is to our best knowledge that using a simple ET patch antenna to generate three uncorrelated waves for MIMO application is reported in this work for the first time. Details of the three-port ET patch antenna are presented
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