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In this paper a detailed study of the effect of strip line on truncated ground plane of a small Ultra Wide Band (UWB) patch antenna is described. The radiator and ground plane of the antenna are etched onto a piece of Printed Circuit Board (PCB) with an overall size of 25×25×1.5 mm. The results obtained from the simulation of the proposed antenna are compared with that of the results of a patch having...
In this paper, a number of planar monopole antennas are first investigated to maximize the bandwidth with a fixed area of the radiator. This is done by changing the feed gap (the spacing between the radiator and the ground) as well as the length and width of the ground plane with the aid of a simulation package. A comparison of these antennas along with two different feed lines (microstrip and co-planar...
Fractal technology has great potential in antenna miniaturization, multi-frequency, ultra-wideband application, and this paper are about fractal technology in the application of multi-frequency microstrip antenna. Based on the fractal structure design of Sierpinski, we studied the multirate characteristics of nested triangle fractal monopole antenna, using electromagnetic field simulation software...
A novel dual band-notched printed monopole antenna (BPMA) for ultra-wideband (UWB) application is presented. The purpose of this antenna is used to prevent interference problems due to the existing nearby communication systems within an UWB operating frequency. The band-notches are realized by adding an independent controllable strip as well as using a hook-shaped defected ground structure (DGS) in...
A coplanar waveguide (CPW) fed semi circular disc antenna with a modified ground plane is presented. The proposed antenna consists of a semicircular radiating patch and semicircular arc-shaped ground plane. To achieve extremely wideband, two modifications are introduced. The first one is to modify the ground plane, and the second one is to insert slits near the feed point. Theoretical results show...
In this paper, a novel corner-truncated patch scheme is described to enhance the operation bandwidth of the open slot antenna for UWB applications. By truncating two corners from the rectangular patch, the bandwidth enhancement of the proposed open slot antenna is well realized. From the simulation and measurement results, it is shown that the corner-truncated patch scheme is an excellent approach,...
A new technique has been presented in an attempt to achieve wideband DRA. Hybrid DRAs are well known as wideband antenna. By adding a parasitic ring to the top of the dielectric resonator ring, we were able to further improve the impedance bandwidth for hybrid DRAs. Using this technique, the bandwidth increases from 96% to 105%, from 92 to 100%, and from 107% to 119%.
A recent paper [1] has introduced a new class of dielectric resonator antennas (DRAs), the so-called supershaped DRAs (S-DRAs). This class of radiators took its name from the mathematical formula, known in literature as superformula (see [1] and references therein), that defines the geometry of the base of the dielectric prism acting as dielectric resonator (DR). S-DRAs feature wideband matching characteristics...
In this paper a dome-dipole antenna for ultra wideband operation is presensted. The antenna is a 3D generalization of the wideband flare dipole. For wideband impedance matching, the outer surface of the dome dipole was exponentially tapered. This design also led to a more uniform radiation pattern over larger bandwidth. Additionally, a 24" wide and 20" tall prototype of the dome-dipole antenna...
Two coplanar waveguide-fed square monopole antennas are presented, one novel antenna is fed with a trident-shape feeding strip, for comparison, the other antenna is fed with a simple feeding strip. By simulating two antennas with the same size, the novel square monopole antenna studied shows a very wide bandwidth of about 9.9 GHz(about 2.1-12 GHz, bandwidth ratio about 1: 5.7), which is two times...
Two novel CPW-fed disc antennas etched with C-like slots are proposed with the impedance bandwidths ratio (VSWR ≤ 2) are 10.6:1 and 12.6:1. The antennas are successfully simulated, designed, and measured, showing the advantages of super wide band, stable gain and omni-directional radiation patterns. They are compact dimension and single-sided, can be easily integrated with monolithic microwave integrated...
In this letter, a patch antenna with folded arrowhead-shaped structure is proposed to extend impedance bandwidth, decrease size and enhance gain. The antenna is optimized, fabricated and measured. The measured results indicate that an impedance bandwidth of 85% with Sll<;-10 dB (5.1 GHz to 12.6 GHz) is obtained and the antenna gain fluctuates from 4.4 dBi to 6.6 dBi over the whole bandwidth. The...
A novel ultrawideband planar slot antenna is presented. In this design, one semicircular structure is etched from the ground plane and the end of microstrip-fed structure also adopts the same structure with another dimension. The simulated and measured results demonstrate that this antenna can provide at least 11:1 impedance bandwidth (VSWR≤2) and good radiation characteristics. Compared with other...
Three notched bands are generated, at selected frequencies, in an extremely wideband base antenna in order to support multiple communication systems while avoiding inference from other systems. Measurements confirm that the fully printed base antenna has an extremely wide 2:1 VSWR bandwidth from 0.72 GHz to more than 30 GHz. By introducing a tuning stub and a pair of open arc-shaped slots, three band...
In this paper, recently developed MatLab tools to automatically design antenna matching networks are introduced. New tools are based on the real frequency techniques which result in optimum antenna matching networks.
The ultra wide band (UWB) systems require antennas having a very broad impedance bandwidth. The planar inverted-F antenna (PIFA) is widely used in mobile and portable devices due to its excellent performance. But it is not used as an ultra wide band antenna as it is assumed to be a narrow band antenna. This paper is aimed at addressing this problem by introducing a PIFA antenna having a parasitic...
A novel half-circular antipodal printed slot antenna with super-wideband performance is proposed. The antenna is fed by microstrip line with a rectangular patch-like tuning stub. A half-circular antipodal structure is employed to improve the antenna's radiation bandwidth. The antenna's impedance matching, radiation patterns and gain, have been investigated numerically and experimentally. As will be...
Recently, there have arisen several new methods of aperiodic antenna array design that are capable of very low sidelobe level performance over ultra-wide bandwidths. The linear polyfractal arrays yielding acceptable performance over many octaves of bandwidth. Similarly, wideband planar arrays are created and optimized based on aperiodic tilings. In this paper, the raised-power-series (RPS) method...
Presented here is a design for an all-metal ultra-wideband antenna element that can achieve bandwidth of 12:1. While the design itself is worth reporting in its own right, this array element was designed as part of a study on low-cost ultra- wide bandwidth arrays reported here. For more robust design validations, finite array simulations will also be performed to mimic the set of S-parameters collected...
This study investigates a new design for the hemispherical heliacal antenna that provides significant improvement in bandwidth, while maintaining essentially the same directivity and half-power beamwidth of the basic hemispherical helical design. The proposed new design utilizes a wideband impedance matching technique and replaces the wire radiating element with a tapered metallic strip. This design...
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