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The ultra-wideband (UWB) antennas are required to cover high impedance bandwidth such that the return loss (RL) is greater than 10 dB with improved gain and radiation efficiency which are required for the different applications. In this UWB range (3.1–10.6 GHz), there are other applications, using narrow band frequency bands, such as WiMAX (3.3–3.7) GHz, WLAN (5.15–5.825) GHz and others. In this case...
In this paper, we propose a micro-strip antenna design for ultra-wide band (UWB) applications. The antenna has a deformed rectangular patch with diagonal cuts and circular edges replacing the sharp edges, a 50 Ω micro-strip feed line and partial ground with a single rectangular groove. These modifications were used to improve the bandwidth to up to 128%. The simulated parameters and analysis of the...
This paper proposes printed ultrawideband monopole antenna with 3.5/5.5 GHz band notching. The 50 Ω CPW feed comprises both gradual central line and ground plane. The undesired frequency bands of 3.5 GHz and 5.5 GHz are rejected by embedding inverted L-shaped and modified U-shaped narrow slits into the monopole patch. The proposed antenna provides operating frequency from 2.8–11 GHz covering UWB system...
In this paper, a printed monopole working at ultra-high frequency (UHF) is designed for TV white space (TVWS) applications. By employing U-shape radiator, tapered feeding and notched ground plane, impedance matching of the antenna is improved and its size is reduced. The proposed antenna achieves 414MHz bandwidth within a dimension as compact as 231mm × 35mm × 0.8mm. Furthermore, characteristic mode...
This paper presents a novel design of ultrawideband origami quasi-taper antenna that can be reconfigured to operate from 1.28 GHz to 4.12 GHz at 3 different states of height, and the operating bandwidths at the 3 states are respectively 1.28 GHz–1.64 GHz (25%), 1.64 GHz–3.56 GHz (74%) and 3.56 GHz–4.12 GHz (14.6%). Therefore, this antenna can be applied for kinds of wireless communications in L band...
In this paper, a hybrid diversity is employed to a UWB MIMO antenna to enhance its MIMO performance evaluated through envelope correlation coefficient (ECC). Polarization-diversity is achieved through vertical and horizontal orientation of elements of the MIMO antenna and evaluated through cross and co-polarized patterns at frequencies 4.5 GHz, 6.5 GHz, and 8.5 GHz. Space-diversity is achieved by,...
A compact printed monopole antenna array using neutralization line to reduce the mutual coupling is proposed. The antenna size is 40 × 80 mm2 with an impedance bandwidth of 3.1 to 12 GHz. Details of the antenna design and simulation results are presented and discussed. Both of the reflection coefficient and radiation characteristics achieve a good improvement.
In this paper, a low-profile microstrip monopole antenna with an ultrawide bandwidth (UWB) is proposed. Via holes, rectangular patches, and a tune stub connecting ground plate are employed to improve the gain and impedance bandwidth of the antenna. Meanwhile, the antenna is etched on a single-layer substrate lowering the cost and complexity of manufacturing process. HFSS software is used to design...
Wideband millimeter-wave arrays are of increasing importance for a growing number of communications or sensing applications. Existing arrays are either narrow-band, prohibitively expensive, or cannot be scaled. In this paper, we present a new class of low-cost ultra-wideband millimeter-wave array operating across the Ka-W bands (26–86 GHz). The proposed design concept and the optimized layout are...
A compact and low profile coaxial probe fed PIFA (Planar Inverted F-Antenna) is proposed. The antenna works in frequency range 3.0 to 12.7 GHz which includes Ultra wide band frequency range (3.1–10.6 GHz). Novelty of this proposed antenna is that it has percentage impedance bandwidth of 121.51%. A parametric study of key geometrical parameters which affects the electrical performance of antenna is...
This paper presents a miniaturized ultra wideband UHF antenna. The antenna is loaded with magneto dielectric material. The antenna consists of a bent dipole backed by a magneto dielectric loaded reflector. The input impedance of the antenna is matched with 50 ohm cable by adopting a special technique that increases the cable impedance gradually to 73 ohm. The antenna is backed by a magneto dielectric...
This research is presented the comparison of geometry-shaped monopole antennas having three models those are rectangle, triangle and circle-shaped. Each proposed antenna has been the step-shaped etching technique on ground plane to enlarge bandwidth. These antennas were designed by CST program to simulate the variety of result such as reflection coefficient, gain and radiation patterns then the simulation...
This paper presents the design of a dual band planar monopole antenna operating in the ultra-wide band frequency range. The antenna is optimized by varying the radiator dimensions. Two values of radii are considered in this paper: 8cm and 12 cm. A copper circular disk has been used as the radiator and FR4 material is considered to create the substrate. To have an optimum performance the distance between...
In this paper, a novel extended Ultra Wide Band (UWB) wearable logo-type textile antenna for body area network applications is presented. The substrate of the proposed antenna is made of Fleece fabric with permittivity 1.17. The proposed antenna comprises of a hexagonal radiating patch and a partial ground plane. Ultra wide bandwidth is attained by optimizing the geometry, introducing a square notch...
The proposed elliptical inset feed patch antenna is introduced here for UWB applications. The antenna yields a wide operating frequency bandwidth of 7.5–15 GHz for less than −10 dB return loss at 11GHz. The analytical results of antenna of small form factor having width 2.8 cm and length 4 cm dimensions exhibit good behavior in gain and radiation pattern. The simulation results have been successfully...
This paper presents a printed microstrip-fed heart-shaped monopole antenna for ultra-wideband (UWB) applications. The printed monopole antenna consists of a heart-shaped radiating patch with a microstrip feeding line and an elliptical curved ground plane to improve the impedance bandwidth. Commercial software ANSYS HFSS is used to analyze and design this antenna. Measured results of the fabricated...
Aiming to realize an end-on-fire antenna with band rejection for UWB system, this paper proposes a planar quasi Yagi antenna with dual-dipole structure. The antenna uses a dual-dipole to generate reverse surface currents at some specific frequency points. This mechanism is used to design band rejection. Simulated and measured results show that the bandwidth of the proposed antenna is from 3.37 GHz...
This paper investigates the time-domain characteristics of an ultrawideband (UWB) dielectric resonator antenna (DRA) for two UWB input pulses. The computed spectrum amplitude of a fifth-order Gaussian pulse has better compliance, as per FCC mask, compared to a first-order Rayleigh pulse. The correlation between the input pulses and the radiated pulses in many directions were found to be less when...
In this paper, a UWB monopole antenna for GPR applications is presented. The antenna offers a large bandwidth from 250 MHz to more than 6 GHz and is relatively compact in size (20 cm × 22.5 cm) than other antennas operating in same frequency range. The time domain performance of this antenna is also analyzed for use it in impulse based radar systems. A prototype of antenna was manufactured and tested...
A new compact band-notched dielectric resonator antenna (DRA) for ultra-wideband (UWB) applications is presented. The antenna elements consist of a thin monopole printed antenna loaded with rectangular dielectric resonator (RDR) which is housed into a dielectric substrate, an I-shaped parasitic strip, and a slot on the ground plane. Here, to realize band-notched characteristic, an I-shaped parasitic...
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