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The Ultra-Wideband (UWB) antenna, as core device in high-speed wireless communication, is widely applied to cell phones, wireless internet, internet of things, and almost all kinds of hand-held and wearable mobile communication equipments. Faced with a plethora of constraints, such as compact size, low power consumption, high bandwidth, and cost-effective manufacture, etc., the design of UWB antenna...
The MIMO (Multiple Input Multiple Output) CPW (Coplanar Wave Guide) feed monopole antenna design with circular polarization is presented. The electrical length of the antenna is made larger by corrugating funnel shaped radiating structures. The corrugated nature of radiating patch elements and slot defected common ground plane helps to resonate both the monopoles at lower operating frequency of 2...
In this paper, we present an offset microstrip-fed ultrawideband antenna with band notched characteristics. The antenna structure consists of rectangular radiating patch and ground plane with rectangular shaped slot, which increases impedance bandwidth upto 123.52%(2.6–11GHz). A new modified U slot is etched in the radiating patch to create band-notched properties in the WiMAX (3.3–3.7GHz) and C-band...
Planar antenna with U-shaped Slot on Radiating Patch and Conductor-Backed Plane for UWB Applications is presented in this paper. The basic planar antenna is modifying by cutting a U-shaped slot on the radiating patch. A U-shaped conductor-backed plane is add on the ground plane and acts as parasite resonator. By inserting an optimized triangular slits and multi-slotted ground plane, the antenna produced...
Designing a MIMO antenna for UWB communication has many challenges including the mutual coupling and the correlation between the neighboring elements of the antenna system. In this paper, we propose a compact size four elements MIMO antenna with simple cross shaped decoupling structure (DS) that is suitable for wide range of UWB applications. Our simulation results show that the proposed antenna provides...
In the present paper, a novel coplanar wiveguide (CPW)-fed printed fractal-shaped slot antenna for bandwidth enhancement is presented. The proposed antenna is composed of a wide fractal-shaped slot and an hexagonal parasitic patch fed by a CPW Feed. The combination of the fractal concept and CPW-fed technique allows to improve the characteristics of the proposed antenna significantly. The simulation...
According to the requirements for the antenna in the portable stroke imaging detection system, a miniaturized ultra-wideband antenna unit is presented in this paper. The size of antenna is 40 × 40 × 0.6 mm3 and measured working frequency (S11 < −10 dB) is 1 GHz to 4 GHz. The fabricated antenna is applied into the brain stroke detection experiment using simplified brain model. The results show the...
A compact printed ultra-wideband antenna with stable radiation properties operating at VHF/UHF band is proposed in this paper. The proposed antenna has a wide impedance bandwidth characteristics for VSWR≤3 of about 118.5%, ranging from 220 MHz to 860 MHz. In addition, the proposed antenna not only can provide the omnidirectional pattern in H-plane, but also can keep the direction of the radiation...
In this paper, a small top plate is found useful to improve the impedance bandwidth of an ultra-wideband dipole antenna horizontally above a ground plane. A linearly-polarized prototype based on this new and simple design methodology can operate over nearly 3.5∶1 bandwidth with return losses better than 10 dB, and with nearly stable radiation patterns, high BOR1 efficiency and aperture efficiency...
In this study, a microstrip-fed ultra-wideband (UWB) antenna with a simple architecture that operates at a frequency range of 3.1–11 GHz is presented. Due to compact and low profile, this type of antenna has an important role in growing applications of commercial and industry. Acceptable return loss level, good radiation pattern characteristics and relatively good gain flatness have been reported...
There are some existing narrowband wireless systems over the designated ultra-wideband (UWB) operating band. To mitigate the potential interferences between UWB system and narrowband systems, a UWB antenna with dual band-notched characteristic is proposed. The antenna consists of a circular patch fed by a 50Ω microstrip line. An altered H-shaped slot is etched on the proposed radiator to introduce...
In order to cover a wide frequency band and meet the demand of multi-band, a microstrip antenna with some MEMS switches was designed by using the reconfigurable technology and fractal technology. Four MEMS switches were symmetrically loaded in the microstrip antenna. By controlling the states of the switches, the surface current distribution will be changed and then the operating frequency will be...
A novel printed monopole antenna for ultrawideband (UWB) applications based on loop sleeve structure in the ground plane is presented. The proposed antenna consists of a rectangular radiating patch, a circular-shaped tapered feed line, and a pair of loop sleeves in ground plane which provides a wide usable fractional bandwidth of more than 100% (3.19–11.03 GHz). Two rectangular loops are inserted...
In this paper, we propose the design of a new reconfigurable frequency selective surface (FSS) for ultrawideband (UWB) applications. The proposed FSS is constituted of a periodic array of two layers, of crossed metallic tapered dipoles, separated by a single-layer FSS and related by a twin wire transmission lines. With the proposed configuration, two propagating paths are formed. One path through...
In this paper a new configuration for flexible wearable microstrip fed Ultra Wide Band antenna is introduced. The proposed monopole antenna which was fabricated on flexible substrate has compact geometry area of 38 × 22 mm2 that makes it suitable for wearable applications. The antenna has a resonating structure at the ground level that enhances the antenna gain performance over designed spectrum....
In this paper, a novel ultra-wide band (UWB) antenna comprised of graphene-based conductor (GBC) sheets is proposed. The proposed antenna is designed and simulated in a full-wave 3D EM solver and fabricated using a GBC sheet on a TMM4 substrate. Simulations and measurement results agree well, showing an overall matching from 2.65 to 10 GHz. Bandwidth and gain of the proposed antenna were also compared...
A planar ultra-wideband (UWB) antenna with quad notched bands is proposed and its performance is investigated in this paper. The designed UWB antenna consists of a rectangle-shaped radiating patch with tapers and a polygon ground plane with a rectangular slot. A rake-shaped resonator (RSR) and a pair of L-shaped slots (LSSs) are employed to achieve the desired four notched bands which are operated...
This paper presents a broadband omnidirectional circularly polarized antenna design using combination of broadband omnidirectional vertically and horizontally polarized radiating elements. The vertically polarized (VP) component is a modified version of ultra-wideband (UWB) monopole antenna and the horizontally polarized (HP) element is a recently-developed omnidirectional HP antenna using planar...
A novel compact printed antenna fed by CPW with WLAN band rejection for UWB applications is proposed in this paper. This symmetrical antenna features three parts: a semicircular stub as the UWB radiator, a pair of modified compact patches which are integrated smoothly as the ground plane with the line-to-arc transition structures, and two U-shaped slots which are embedded on the ground plane to reject...
The offset fed planar inverted L antenna is proposed and numerically analyzed. The antenna characteristics of proposed antenna are compared with those of the planer dipole antenna. When the antenna size is 580 mm by 100 mm by 80 mm, the S11 less than −10 dB is satisfied at the frequency from 164 MHz to 293 MHz. At this frequency band, the directivity becomes 2.26 dBi to 3.84 dBi.
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