A Planar Dualband Antenna Array

Abstract

A planar dual-band antenna array for point-to-point communication is presented. The proposed compact antenna array operates at 2.4-2.5 GHz (4%) and 5.1-5.5 GHz (7.5%) with 11 10 dB, and corresponding gains of 11-13.3 dBi and 10.6-14.5 dBi respectively. It consists of four branches suspended at a height of 5 mm above a 250 250 mm ground plane. Each quarter consists of a series-fed meandered step-impedance filter connected to a L-shaped radiator, and they transverse horizontally away from the epicenter. The insertion loss method with non-redundant synthesis for filter design is applied to control the radiation aperture of the antenna array, allowing both the 2.4 GHz and 5.5 GHz radiators to co-exist and operate independently. A stable broadside radiation pattern and gain are achieved.Index Terms-Antenna array, dual-band antenna array, filter, microstrip antennas, multifunction aperture, patch antennas, WLAN.

Dual-band WLAN Antenna Array with Integrated Filters for Harmonic Suppression

“…The WLAN operates at 2.4 GHz and 5.8 GHz as defined by the IEEE 802.11a/b/g/n/ac standards [1]. Currently, the 2.4 GHz and 5.8 GHz point-to-point antenna arrays are mounted separately with discrete ports [2]. It is difficult to achieve a broadband planar antenna array with stable directional radiation patterns from 2.0-6.0 GHz, as gain is proportional to radiation aperture [2].…”

“…Currently, the 2.4 GHz and 5.8 GHz point-to-point antenna arrays are mounted separately with discrete ports [2]. It is difficult to achieve a broadband planar antenna array with stable directional radiation patterns from 2.0-6.0 GHz, as gain is proportional to radiation aperture [2]. Hence, a dual-band array structure is preferred due to its simple system configuration and cost minimisation.…”

“…Hence, a dual-band array structure is preferred due to its simple system configuration and cost minimisation. Although similar work is proposed in [2] and [3], but is disadvantageous with respect to a few qualities; such as, 3 rd order filters being used, larger 2x2 array structures, single-band operation and final response not being sufficiently sharp. In this presented work, a dualband 1x2 antenna array with 2 nd order integrated filters is designed, modelled and simulated.…”

Dual-band WLAN antenna array with integrated bandpass filters for harmonic suppression

“…Hence, a dual-band array structure is preferred due to its simple system configuration and cost minimization. Although similar work has been proposed in [2] and [3], but is disadvantageous with respect to quite a number of factors; such as, larger 2x2 array structures, single-band operation, final response not being sufficiently sharp and most importantly spurious harmonics not being fully rejected. Similarly, [4] and [5] are unfavorable as well since the filters employed are of 3 rd and 4 th orders, and again the spurious harmonics have not been fully rejected.…”

“…Currently, the 2.4 GHz and 5.8 GHz point-to-point antenna arrays are mounted separately with discrete ports [2]. It is difficult to achieve a broadband planar antenna array with stable directional radiation patterns from 2.0-6.0 GHz, as gain is proportional to the radiation aperture [2].…”