Small-Size Meandered Loop Antenna for WLAN Dongle Devices

Abstract

This paper proposes a loop-type USB dongle antenna, which is fabricated on a 1.6 mm thick FR-4 substrate for WLAN band systems. The front side of substrate consists of a 50-ohm coaxial line and a multiarm monopole antenna, while the back side has a meandered loop antenna connected to the ground by two via holes. The meandered loop resonates half-wavelength mode at about 2.4 GHz and its higher modes. The higher modes excited by the multiarm monopole form the 5.2 GHz frequency band. The bandwidth of the antenna covers the IEEE802.11 a/b/g WLAN applications. The overall dimensions of the antenna of 30 × 13.75 × 1.6 mm3with an antenna area of 7.5 × 13.75 mm2and a planar structure are exactly suitable for applying in dongle devices. The measured results of radiation patterns, antenna gain, and radiation efficiency are also proposed and discussed in the paper.

Small Antenna Design of Triple Band for WIFI 6E and WLAN Applications in the Narrow Border Laptop Computer

“…Studies [1][2][3][4] have discovered that the guidelines for designing WLAN antennas with coplanar waveguide, slot, and bend-type architectures cannot be implemented because of limited dimensions. In [5], small dimensions and a meandering shape with loop-type antennas were used. Other studies have investigated designs such as PIFA or monopole antennas for Wi-fi applications [6][7][8][9].…”

A Novel 5G LTE Antenna Design for Portable Devices

“…e evolution of wireless system technology has enabled not only the miniaturization but also the multiband applicability of antenna systems of portable communication devices such as smartphones and laptops (notebooks (NBs)) [1][2][3][4][5]. In particular, not only laptops support wireless LAN (WLAN) but also developments have occurred with respect to 4G/5G wireless systems [6][7][8][9].…”

“…At the middle band, the bandwidth percentage was 44.5%, and it equalled GSM 1800 (1.71-1.88 GHz)), GSM 1900 (1.85-1.99 GHz), UMTS (1.92-2.17 GHz), and LTE 2500 (2500-2690 MHz). At the high band, BW% was 21% for C band (3.4-4.2 GHz) and BW% � 12.7% for license-assisted access (LAA) (5.15-5.85 GHz) [2][3][4]10]. In current commercial communication equipment of STBR (screen-to-body ratio) is significant for user impression; thus, limited space is reserved for antennas.…”

“…Previously executed research [9,12] has proposed an approach for designing small antennas with a meander architecture. In other research studies [3,8,10,13], meander structures with loop-type antennas were used to achieve a small equipment size. In addition, a bent arm was used by other researchers to design an antenna for multiband applications [12,14].…”

A Compact Coupled-Fed Loop Antenna for Mobile LTE Smartphones

“…The third one is the slot antenna configuration [4]. The fourth one includes the various types of loop antenna [5][6][7][8]. Because of both multiresonant mode and high-efficiency characteristics of the loop antenna, that is, the 0.5 λ monopole mode, the 1 λ dipole mode, the 1.5 λ higher order monopole mode, and the 2 λ higher order dipole mode [9], in which the dipole mode offer better user experience due to its balance characteristic [10], the loop antenna is first considered and developed for wideband or multiband antennas of mobile phones comparing to other types of configuration.…”