Compact tri‐band monopole antenna with hybrid strips for WLAN/WiMAX applications

Abstract

A novel compact microstrip‐fed tri‐band monopole antenna for WLAN and WiMAX applications is presented in this letter. Hybrid Strips including an L‐shaped strip and a meandered strip are used to generate three resonances in the monopole antenna. Due to the use of a meandered line structure, the antenna size is reduced to 38 × 20 × 1 mm3 only. Compared to the existing designs, the proposed antenna has a size 30, 55, and 70% of the designs in [1–3], respectively. To investigate the performance of antenna versus key antenna design parameters, results of a parametric study are presented. Simulated surface current is also shown. To validate the concept, one antenna prototype is implemented and tested, and the measured results show that the antenna can achieve good performance for WLAN 2.4/5.8 GHz and WiMAX 3.5 GHz applications. The antenna has a compact size and is easy for fabrication, hence useful for practical applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:94–99, 2015

Slot Loaded Compact Microstrip Patch Antenna for Dual Band Operation

“…Miniaturization of a microstrip patch antenna using slot on ground plane without and with slotted patch has been discussed in [7,8]. Another very popular method for designing a compact multi-frequency microstrip patch antenna is the concept of monopole antenna, using defected ground plane and modified patch [9][10][11]. In [9], it has been shown that with the addition of inverted L-shaped strips the antenna resonates at lower resonating frequency, and defected ground structure has given a proper impedance match.…”

“…But in this design, the total size of the patch has been increased due to the addition of L-shaped strips. In [10], hybrid strips are used to generate multi-frequency, and it has been shown that the addition of an L-shaped strip has given an extra frequency, and about 70% size reduction has been achieved. Yang et al [12] have proposed a new miniaturized design of patch antenna with grounded strips which are connected to the ground plane by an array of shorting pins, and thus radiating patch has been reduced by 74%.…”

A Dual-band Inverted F Antenna with L-slots for WLAN

“…The parasitic element at the top can obtain center frequency 2.4GHz. The L-slots in parasitic elements at the top of the antenna have been used to obtain wide band [5][6][7].…”

A Novel Compact Broadband Antenna for Lte/Wlan/Wimax Applications

“…A wireless communication antenna is required to cover a very wide frequency bandwidth or several frequency bands and is expected to be small in size and has high efficiency. For short-and long-range applications, many antennas [1][2][3][4] have been designed for the wireless local area network (WLAN) application in the 2.4 GHz (2.4-2.484 GHz)/5.2 GHz (5.15-5.35 GHz)/5.8 GHz (5.725-5.825 GHz) operating bands and the worldwide interoperability for microwave access (WiMAX) application in the 2.5 GHz (2.5-2.69 GHz)/3.5 GHz (3.3-3.8 GHz)/5.5 GHz (5.25-5.85 GHz) operating bands. Because of the advantages of low cost, easy integration, easy fabrication and omnidirectional radiation pattern, the printed monopole antenna has drawn much attention, and many shapes have been reported, such as G shape [5], L shape [6], E shape [7], C shape [8], etc.…”