Design of a wideband dual-polarized microstrip patch antenna with novel structure for WLAN application

Abstract

This article presents the design of a novel structure to increase bandwidth of single layer dual‐polarized microstrip patch antenna using metallic cone on top of the patch antenna. The antenna is fed by two orthogonal 50Ω microstrip feedlines using λg/4 transformers. Tunable stubs are employed along the quarter‐wavelength transformer to optimize the antenna's impedance match. Results confirm the parasitic cone mounting provides significant bandwidth enhancement. The antenna was fabricated, and a good agreement is achieved between measurement and simulation. The measured results show that the antenna achieves a −10 dB impedance bandwidth of 29% and isolation of >22 dB between the two input ports across its operating bandwidth (4.8–6.44 GHz) with low cross polarization level of <20 dB. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1599–1602, 2016

A Low-Profile, Wideband, Dual-Polarized Patch Dipole With Unidirectional Radiation Patterns

“…It can be seen that the proposed dual-polarized antenna has some advantages such as lower profile and wider operating frequency band than the works in [12][13][14][15]. Although the proposed antenna has a similar profile to the one in [16], it still demonstrates higher isolation and wider bandwidth. Compared with antenna #1 in [10], the proposed dual-polarized antenna has lower profile but narrower bandwidth.…”

“…in [15] 0.160λ C 24.9% > 29 < −15 Ant. in [16] 0.141λ C 29% > 22 < −18 Ant. #1 in [10] 0.316λ C 53% (< 15 dB) > 30 < −20 Proposed Ant.…”

“…The average measured gains are about 9.9 dBi and 10.1 dBi for Port 1 and Port 2, respectively, slightly lower than the simulated ones. Some comparisons between antennas published in [10,[12][13][14][15][16], and the proposed one is made as shown in Table 1. It can be seen that the proposed dual-polarized antenna has some advantages such as lower profile and wider operating frequency band than the works in [12][13][14][15].…”

Wideband Dual Polarized Compact Design of Pi-Shape Microstrip Antenna for Gsm, Ism, and Satellite Applications

“…With reference to the resonant length path as shown in Fig. 8(a), length 'L p ' is expressed in terms of the basic Pi-shape patch dimensions 'L' and 'W ' as given in Equation (13). A similar ratio between various Pi-shape patch parameters as present in the above optimum design is considered.…”

“…Several techniques like the use of stack resonators [5,6], slot or stub loaded MSAs [7][8][9][10][11], and different probe feeding techniques [12] have been reported for the realization of wider BW, offering polarization agility. The use of parasitic metallic cone and two microstrip feed lines [13], or the combination of multiple patch parameters along with a modified feeding technique [14][15][16][17], leads to a complex design for realizing the dual-polarized (DP) wideband response. A compact and wideband design of DP MSA by using overlapped parasitic patches is reported [18].…”