A Compact Omnidirectional Dual-Polarized Antenna for 2.4-GHZ Wlan Applications With Highly Isolated Orthogonal Slots

Abstract

Abstract-An omnidirectional dual-polarized slot antenna with high port isolation for 2.4-GHz wireless local area network (WLAN) applications is proposed in this paper. The omnidirectional radiation patterns of the vertical polarization (VP) and horizontal polarization (HP) are achieved by individually cutting two orthogonal slots onto the metal walls of a cuboid antenna. The overall volume of the compact antenna is only 60 × 10 × 10 mm 3 (0.488λ 0 × 0.081λ 0 × 0.081λ 0 ). A prototype of the designed antenna is manufactured and tested. Both simulated and measured results show that the −10 dB impedance bandwidths of dual polarizations cover the desired band of 2.4-2.484 GHz and the port isolation, in the operating frequency, is less than −35 dB. Stable measured gains are greater than 2.75 and 1.35 dBi for the VP and HP, respectively.

Modified circular common element four-port multiple-input-multiple-output antenna using diagonal parasitic element

“…In the field of MIMO antenna design, compact antennas have much concern due to their numerous features such as, low cost, simplicity, low profile, and easiness in fabrication and integration. In past few years, some compact MIMO antennas have been proposed for different applications such as Wi‐Fi, LTE, WiMAX, and WLAN . In MIMO antenna system, two or more closely placed elements get mutually coupled due to electromagnetic interactions.…”

“…In past few years, some compact MIMO antennas have been proposed for different applications such as Wi-Fi, LTE, WiMAX, and WLAN. [3][4][5][6][7] In MIMO antenna system, two or more closely placed elements get mutually coupled due to electromagnetic interactions. The high mutual coupling leads to impedance mismatch and low radiation.…”

Wideband columnar slot antenna

“…Wideband and multiband antennas featuring omnidirectional radiation pattern in the azimuthal plane are often required in modern commutations systems. Recently, a number of innovative columnar designs of single‐band and multiband omnidirectional antennas have been proposed for use as MIMO antennas , slot antenna array , and access point antennas . They feature one or several slots cut in the metallic walls of the columnar structure.…”

“…In the work reported in this article, we expand upon the designs and goals of Refs. . Specifically, we strive to design a wideband columnar antenna that covers the entire 1.7–3.7 GHz band, thereby covering not only all the bands covered by the antenna of Ref.…”

The Design of a Dual-Polarized Small Base Station Antenna With High Isolation Having Dielectric Feeding Structure

“…Recently, many researchers have developed base station antenna with dual-polarization [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. However, the size of the published base station antenna is large, and it is impossible to mount it on a metallic cube.…”