Cavity-Backed Slot-Coupled Patch Antenna Array With Dual Slant Polarization for Millimeter-Wave Base Station Applications

Abstract

This paper presents a novel dual slant polarized antenna for millimeter-wave (mmWave) base stations. Compared with the traditional slant polarized mmWave antennas, the proposed antenna offers the advantages of high cross-polarization discrimination (XPD), good aperture efficiency, simple structure, and low profile. The corner-fed substrate integrated waveguide (SIW) cavity is adopted to improve the port isolation and XPD of this slot-coupled antenna. Four corner-truncated patches connected by a thin cross strip are placed over the SIW cavity to increase the operation bandwidth. Then, a 2 × 8 antenna array is designed to exemplify the antenna element performance. To improve impedance matching, a shorted patch is introduced in designing the series feeding network and the power divider. The experimental results show that the 2-dB-down gain bandwidth of the proposed antenna array reaches 6.0% and the port isolation is better than 20 dB. The gain and XPD of the antenna array measure 16.7 dBi and 25 dB at the center frequency, respectively.

A millimeter‐wave dual‐polarized stacked patch antenna with enhanced bandwidth and low profile

“…The performances of the proposed design and the state-of-the-art designs are summarized in Table 1. Compared with the reported mm-wave dual-polarized patch antennas, [19][20][21][22][23][24][26][27][28] the proposed design shows wide bandwidth with relatively low profile. Meanwhile, the structure is still compact and simple.…”

“…Some dual-polarized patch antennas are designed in mm-wave band. The single-layer patch fed by two orthogonal microstrip lines, 18 substrate integrated waveguide 19 or substrate integrated waveguide cavity 20,21 are utilized to achieve mm-wave dual-polarized antenna, which can achieve relative bandwidths between 3.6% and 8.6%. To further increase the bandwidth, a single patch with air gap fed by multilayer coupled slots is proposed in Reference 22, which gets a bandwidth of 18% with a profile of 0.14λ 0 .…”

Wideband dual‐polarized wide solid angle scanning cylindrically conformal millimeter‐wave phased array

“…Most sub-6 GHz wideband dual-polarized base station antennas are inspired by cross dipoles fed by vertical balun, [9][10][11][12][13] which is difficult be applied to mmWave base stations. 14 Therefore, appropriate cylindrically-conformal phased array with wide band, dual-polarization, and wide-angle scanning characteristics is still needed to be researched for mmWave base stations.…”

Wideband split-ring antenna arrays based on substrate integrated waveguide for Ka-band applications

“…With the ever increasing demand worldwide for high-speed data transmissions among mobile terminals, the components involved in the wireless communication links such as antennas, amplifiers, power dividers, transmission lines, and transitions have been under intensive study during the past decades [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In order to achieve larger bandwidths within a limited spectrum, these components are pushed to operate at higher frequencies which already reach the ranges of millimeter-wave and terahertz (THz) frequencies.…”