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A compact dual-band rectangular ring printed antenna for wireless local area network (WLAN) applications is proposed and investigated in this paper. The dual-band is realized by using a rectangular ring patch connected with a 50Ω mini-coaxial feed structure composed of a longitudinal slot and a small rectangular, occupying a small board space of 30.6mm∗6mm on the system circuit board. With a modified...
Penetration of multimedia communications with mobile Wi-Fi and tethering requires wireless LANs (WLANs) to guarantee a specific bandwidth in densely deployed WLANs. IEEE802.11e (HCCA) with 802.11aa could use inefficiently radio frequency as well as fail to provide each WLAN with enough CFP period in which sending opportunity of a terminal is guaranteed. To guarantee a specific bandwidth even in densely...
The advent of future 5th Generation (5G) use cases, such as ultra-dense networking and ultra-low latency propelled by Smart Cities and IoT projects will demand revolutionary network infrastructures. The need for low latency, high bandwidth, scalability, ubiquitous access and support for IoT resource-constrained devices are some of the prominent issues that networks have to face to support future 5G...
This paper presents a low voltage 5GHz WLAN receiver (RX) with 0.8V power supply. The RX targets 802.11ax standard implemented in CMOS technology node from 28nm to 14nm whose power supply voltage will decrease to 0.8V. The RX presents three key techniques that overcome the challenges for the low voltage operation. An RF amplifier employs a variable source degeneration to improve the linearity. A quadrature...
In this paper, three designs of planar antenna is presented. These low profile planar antennas can be used within widely used bands of frequencies that is, between 800MHz to 9GHz (10 bands) of all cellular from 2G to 4G and beyond. In addition, the coverage frequency includes wireless local area networks (WLAN) and WiMax. Significant structural changes are made in one of the latest structure of multiband...
This paper presents a design of compact tri-band F-shaped slot antenna using complementary split ring resonator (CSRR) for Mobile and Wireless Local Area (WLAN) applications. The aim of this paper is to design a very small-profile antenna (27.48×26.59mm2) or 0.08λ0× 0.08λ0 (λ0 = 900 MHz) that can operate in tri-band frequency ranges around 900MHz, 1800MHz and 2.4GHz. By etching F-shaped slots on each...
In this work, we introduce a powerful hardware-based rogue access point (PrAP), which can relay traffic between a legitimate AP and a wireless station back and forth, and act as a man-in-the-middle attacker. Our PrAP is built of two dedicated wireless routers interconnected physically, and can relay traffic rapidly between a station and a legitimate AP. Through extensive experiments, we demonstrate...
In this paper, a Coplanar Wave Guide (CPW)-Fed microstrip octagonal patch antenna for WLAN and WIMAX Applications is proposed. The studied structure is suitable for 2.3/2.5/3.3/3.5/5/5.5GHz WiMAX and for 3.6/2.4–2.5/4.9–5.9GHz WLAN applications. The octagonal shape is obtained by making a cut in the four angles of the rectangular microstrip patch antenna; in addition the using of CPW-Fed allows obtaining...
This paper presents a triple-band printed-circuit-board microwave absorber for applications in 2.4GHz WLAN and 3.5/5.8GHz WiMAX bands. The absorber consists of simple geometries with tuning elements and chamfering, which can significantly reduce the modeling errors. The study and design processes are based on numerical simulations. The simulated results show the absorption bandwidths (at 50%) of 160MHz...
In this paper, an Ultra Wideband (UWB) Monopole antenna is proposed for several applications. The size of the antenna is 55mm × 35mm × 1.7mm with dual F-slots in its ground plane and three different pairs of rectangular slots in its upper patch. In order for the antenna to resonate at multiple frequencies or to attain wide impedance bandwidth, the relative lengths, heights and positions of the slots...
In this paper a simple design, compact size, and low cost ultra wide band (UWB) rectangular patch antenna with defective ground plane with WLAN (5.5GHz) band notched characteristics is proposed. The band notch is created by inverted V slot on rectangular patch. The proposed antenna is designed on FR4 substrate of size 18 × 24 × 0.8mm. The antenna achieves an operational bandwidth from 3.3 GHz to more...
The size of data chunk diverges from 101 to 1010 bits. Generally, if a network carries in a way both of big size data and small size data, the performance is extremely degraded by the big size data. Then, we propose to select a wireless cell among of multiple cells by referring context information such as data size and user's situation such as moving velocity. Especially, we show the improvement on...
This paper proposes a fast and low-complexity retransmission scheme for Industrial WLAN system. The proposed scheme exploits the frequency diversity and employs channel selectivity in order to achieve high-reliability and low-latency communication. The channel selectivity is carried out instantly by re-scheduling sub-carrier allocation during OFDM transmission in order to obtain diversity gain. Evaluation...
Over the past years, dielectric resonator antenna (DRA) technology has received extensive attention. This is in view of some attractive features, which include no conductor loss, light weight and high radiation efficiency [1]. Some of the recent work focuses on enhancing the impedance bandwidth of a DRA by introducing parasitic elements, cascading resonators or shaping the DRA elements [2-9].
A simple wave-traps multi-input multi-output (MIMO) antenna design is presented for wireless local area network (WLAN) operation. The measured −10 dB bandwidths for return loss are covering the WLAN2.4 and Wlan5.2/5.8 bands. The antenna structure is uncomplicated; it's composition by two symmetrically antennas and places on the clear-area which is at upper substrate. The proposed MIMO antenna system...
A broadband circularly polarized patch antenna is proposed for WLAN system application. Seven identical curved branches extended from the circular patch are designed to generate circular polarization. Simultaneously, seven identical slots are symmetrically etched on the junction of each curved branch and the circular patch. The dimension of the antenna is reduced by 17.8% compared with no slots. The...
This paper presents a triple band base-station antenna having high gain. The antenna consists of a number of planar patches and vertical shorted patches. The planar patch is made of U-shaped and E-shaped slots. The multi-frequency configuration of this antenna resonates at triple band frequencies of 2.17 GHz, 2.44GHz and 3.6 GHz as undersigned in Worldwide Interoperability for Microwave Access (Wi-MAX)...
Microstrip patch antennas are widely used in various wireless applications such as Wireless local area network (WLAN). WLAN is capable of providing maximum data transfer rate of 600 Mbps. The proposed antenna design has a slotted H-shaped patch and dumbbell (H) shaped Defected Ground Structure (DGS) on Flame Retardant-4 (FR-4) substrate with the microstrip feeding technique which radiates at 2.4GHz...
The printed monopole antenna having dual band is proposed which operates at frequency 2.54 GHz (Bluetooth) and 5.2GHz (WLAN). Bluetooth and WLAN have been widely applied in all new trending laptops and smart phones. These two technologies are well known for its effective cost and high-speed data connection. The antenna comprises of two rectangular patches of different sizes for the required dual-band...
Dielectric Resonator Antenna (DRA) plays a vital role in the wireless communication systems due to its support for wide impedance bandwidth and symmetrical radiation pattern. Dielectric Resonator Structures (DRS) combined with metallic structures reduce the antenna size at low frequency bands of operation. In this paper, a monopole antenna is designed to operate at 5.5 GHz and the antenna performance...
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