Compact dual‐band quasi‐Yagi antenna with pattern diversification for WI‐FI 6E applications

Abstract

A dual-band quasi-Yagi antenna with diverse radiation patterns at different frequency bands is presented for the Wi-Fi 6E applications. It has multiple working bands that cover the two existing bands of traditional Wi-Fi 6, that is, from 2.4-2.4835 to 5.17−5.835 GHz, as well as the upcoming extended Wi-Fi 6E band that covers the 5.925−7.125 GHz band. The proposed antenna consists of a microstrip (MS) line, a coplanar strip-line (CPS), a bow-tie driven dipole element, a slotted ground plane and a parasitic director element. By jointly employing these structures, multiple resonances can be generated, where the resonance with largest current path results in low-frequency working band, while the others are merged to form a relatively wide high-frequency band. In the low-frequency band, the antenna has an omnidirectional radiation pattern with wide beam-coverage, while in the high-frequency band, the antenna can achieve directional radiation pattern with high gain value. An antenna prototype is then fabricated and measured for validation. Good agreement between the simulated and measured results is observed. The measured −10 dB impedance fractional bandwidth are 4.3% (2.38−2.484 GHz) and 60.6% (4.47−8.36 GHz) in the low-and high-frequency bands, respectively, associated with peak gain values 0.64 and 6.22 dBi. The antenna's overall size is 0.22 λ L × 0.20 λ L × 0.006 λ L . The proposed antenna is a good candidate for multiple kinds of Wi-Fi applications.

Low‐profile and broadband microstrip antenna with pattern diversity

“…Diversity antennas can effectively improve channel reliability and reduce the influence of multipath fading without increasing the power of the signal transmission, 1 which are divided into three types, including spatial diversity antenna, 2,3 polarization diversity antenna, [4][5][6] and pattern diversity antenna. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] The pattern diversity antenna can reduce the interference of noise and the system coupling, improving radiation efficiency. A wide beam coverage can be achieved with pattern diversity without additional spectrum resources.…”

“…One is to integrate radiation units with various radiation patterns. [8][9][10][11][12][13][14][15][16] Li et al 8 designed an antenna with a broadside pattern and omnidirectional pattern by inserting a SIW cavity at the center of the patch antenna. A monocone antenna and a microstrip antenna are combined to generate two different patterns.…”

“…The techniques for realizing pattern diversity can be categorized into two classes until now. One is to integrate radiation units with various radiation patterns 8–16 . Li et al 8 designed an antenna with a broadside pattern and omnidirectional pattern by inserting a SIW cavity at the center of the patch antenna.…”