Bandwidth enhancement using modified L-probe fed slotted patch antenna for WLAN and UMTS applications

Abstract

In this paper, two different radiating structures fed with modified L-probe, are reported using a circuit theory concept. The proposed antennas are operating in wireless local area network (WLAN) and universal mobile telecommunications system (UMTS) frequency bands. In the first design, an E-shaped patch is studied to increase the bandwidth. It is observed that the bandwidth is directly proportional to notch dimensions. In the second design, E-shaped patch is modified to reduce the antenna size up to 30% with high bandwidth. In the first design, measured bandwidth and gain achieved are 32.68% (1.92–2.67 GHz) and 8.43 dBi while in second design it is 34.19% (1.94–2.74 GHz) and 8.39 dBi, respectively. Radiation patterns for both the antennas are symmetrical and broadside in nature. The proposed antennas are fabricated and measured results compare well with the theoretical and simulated results.

Design of a compact magneto‐electric dipole antenna

“…However, the microstrip antenna has obvious disadvantages of narrow bandwidth and large aperture size due to the inherent high Q-value characteristic. 1 To alleviate this problem, many approaches have been proposed, such as adopting aperture-coupled feed 2 or L-probe feed, 3,4 loading fractal structure 5,6 and so on. Nevertheless, while increasing the impedance bandwidth, other properties deteriorated, such as large gain fluctuations, high cross-polarization level, and large size.…”

Bandwidth enhancement of compact patch antennas by loading inverted “L” and “T” strips

“…Several methods targeting the patch antenna bandwidth enhancement have been reported previously [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Various techniques have been employed.…”