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This paper proposed a novel monopole antenna design for LTE/UMTS/WLAN applications used in USB dongle. The antenna is printed on a 1.6 mm thick FR4 substrate with overall dimension of 60 mm × 12 mm. The proposed antenna is comprised of an antenna section of 20 mm × 12 mm and a system ground of 40 mm × 12 mm. The RF signal is fed by a 50-ohm mini coaxial cable line. To excite broad dual-band operation,...
In this paper, a design of MIMO antennas using two spiral structures for achieving better isolation is proposed and examined. It is mainly designed on the small size antenna portion in dongle devices for WLAN 2.4 GHz band. The overall size of the design is 30 × 12 × 0.8 mm3 and the antenna portion of the antenna is 10 × 5 × 0.8 mm3 implemented on the FR4 substrate with a relative permittivity of 4...
In the paper, the design of MIMO antennas with three ports is proposed and investigated. The three monopole antennas are fed by 50-ohm mini coaxial cable lines. Three monopoles are located as the right, the middle and the left side of the top edge of the design. Two L-shaped strips protruded from the ground and four inverted L-shaped strips extended from the ground is introduced to the design for...
A design of MIMO antennas using two monopole structures adding a neutral line connected to ground plane for achieving better isolation is proposed and examined. The antenna uses curved C-shaped arm to resonance the bands of IEEE802.11b/g/n; another arm extended on the feed achieves the bands of IEEE 802.11a application. The overall size of the design is 45×25×1.6mm3; the occupied area of the antenna...
This paper presents an Inverted-F Antennas (IFAs) type MIMO antenna with Wi-Fi and Blue-Tooth band for smart watch application. The overall dimensions of 40×40×5.4 mm3 of the proposed design consisting of an antenna portion of 40×5×0.1 mm3 and system ground portion of 40×40×0.4 mm3. The antenna geometry is composed of two identical IFA antennas extended from the two side of the ground, which designed...
In this paper, a multi-band monopole antenna for Universal Serial Bus (USB) dongle applications is proposed and examined. The antenna is fabricated on an FR4 substrate of permittivity of 4.4, thickness of 0.8 mm, and loss tangent of 0.0245.The antenna consists of a bent monopole and an inserted strip horizontally. The bent monopole resonates a mode operation at 2.4 GHz and 5.2 GHz. The L-shaped monopole...
In this paper, a monopole antenna with two curved stripes connected to feed point is proposed for WLAN USB dongle application. The meandered monopole excites a resonant mode at 2.4 GHz while the shorter curved strip operates two higher modes for 5.2 and 5.8 GHz bands. By the way, the part of two higher modes (5.2 and 5.8 GHz) is just used one band to cover the bands at 5GHz. The longer curved strip...
This paper proposes a monopole type MIMO antenna at WLAN band for dongle application. The MIMO antenna consists of two identical monopole antennas on both ends of an FR4 substrate and operates a frequency band at 2.45 GHz. The antenna is fabricated on an FR4 substrate of permittivity of 4.4, thickness of 1.6 mm, and loss tangent of 0.0245. The isolation mechanism is by cutting U-slot and introducing...
The monopole antenna using a simple architecture for WLAN 2.4 GHz and using a 50-ohm mini coaxial cable is proposed and investigated. Using an extended strip on a longest path of the antenna is to resonate a 2.4GHz mode and a mode about 5.8GHz. By an introduction of a pair of L-shaped strips on the antenna to help the impedance match. The antenna is designed with a simple structure, and a compact...
In this paper, a meandered monopole antenna with an extended back ground plane is proposed for WLAN USB dongle application. The meandered monopole excites a resonant mode at 2.4 GHz while the extended ground plane operates a higher mode for 5.15 GHz bands. A U-shaped strip is added to adjust the antenna's matching. From the simulated and measured return loss, the 10 dB operating bands cover the IEEE...
In this paper, a novel triple band antenna is proposed for Universal Serial Bus (USB) dongle applications. The proposed antenna is made by designing a monopole type antenna and adding an L-shaped strip on ground plane. The monopole antenna excites three resonant bands at 2.4, 4.2, and 5.8 GHz. By adding the L-shaped strip, the impedance matching of the 2.4 GHz band is improved and the middle band...
In the article, two PIFA antennas fabricated on both ends of an FR4 substrate are introduced for MIMO application. The two identical PIFAs excite resonant bands (S11 and S22) both at 2.45 GHz for WLAN application. The isolation mechanism is accomplished through a separated cross-shaped isolation element, which is extended from the ground plane and located between the PIFAs. By adding the isolation...
This paper proposes a PIFA type MIMO antenna at WLAN band for dongle application. The MIMO antenna consists of two identical PIFA antennas on both ends of an FR4 substrate and operates a frequency band at 2.45 GHz. A T-shaped element that is extended from system ground and a neutral line located on back side of the substrate are used to increase isolation between the two PIFAs. The neutral line is...
A monopole slot MIMO antenna with small size for wireless USB dongle application at WLAN band (2.4 ∼ 2.484 GHz) is proposed. The proposed antenna occupies a small area of 10.5 mm × 20 mm, which is composed of two identical folded antenna modules on both side and one isolated element. Each of the folded antenna modules consists of two open-ended monopole slot antennas with different lengths, which...
A compact wide-slot antenna fed by microstripline for wideband operation is proposed and studied. The proposed antenna consists of a microstrip-fed line, and a wide rectangular slot with a reverse L-shape slot. The proposed antenna can resonate the bandwidth from 2.17 GHz to 6.25 GHz, and these frequency bands cover the standard IEEE 802.11b/g (2.4- 2. 485 GHz) and IEEE 802.11a (5.15 - 5.35 GHz, 5...
There have been a number of TCP variants proposed in the literature to combat random packet losses in wireless networks. In this paper we first perform a simulation study on the performance of these TCP variants in the context of IEEE 802.11 WLAN with various channel conditions, generated using different wireless error models and show that none of the existing TCP variants has superior performance...
In recent years, wireless communications have progressed very rapidly. Wide-band antenna and multi-band antenna designs have become very important for wireless communications. Several promising monopole antennas for WLAN and WiMax applications have been reported recently. According to the WiMax protocol, there is three bands have been allocated for WiMax application: the lower band is 2.5-2.69 GHz,...
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