UWB Slot Antenna Research Articles

UWB TAPERED-SLOT PATCH ANTENNA WITH RECONFIGURABLE DUAL BAND-NOTCHES CHARACTERISTICS

An ultra-wideband patch antenna (UWB) that makes use of tapered slot technology is designed and analyzed in this article. Coplanar waveguide feeds the projected antenna. The presented antenna displayed superior UWB performances with -10 dB return-loss bandwidth, ranging from 1.9 to 12 GHz. The projected slot antenna has another benefit of minimizing the interference effect of the narrow band communications conducted by two notch bands operating at 3.3–3.8 GHz (WiMAX) and 5.1-6 GHz (WLAN and HIPERLAN/2), respectively. The Dual-Bands rejection is generated by etching out a complementary split ring resonator (CSRR) from the patch and placing a trapezoidal split ring resonator (TSRR). Adaptable single or dual-band rejection characteristics have been added to the behavior of the UWB antenna, by mounting electronic switching across SRR and CSRR. Furthermore, the presented UWB slot antenna is printed on an FR4-epoxy substrate (εr = 4.4) and it has an overall size of . 55x48x1.5 mm3

A Flexible UWB Slot Antenna with Quad Band-notched Characteristics for Wearable Application

A Flexible UWB Slot Antenna with Quad Band-notched Characteristics for Wearable Application

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

Slot and EBG-Loaded Compact Quad Band-Notched UWB Antenna

Slot and EBG-Loaded Compact Quad Band-Notched UWB Antenna

A compact uni-planar printed slot UWB antenna with reconfigurable functionality

In this article, a compact uni-planar printed slot antenna with SAS geometry is proposed, facilitating UWB multi-bands, band-rejectionality, LP and CP using reconfigurable technique, with 2 x SMD diodes. For SMD1-ON, SMD2-ON, states antenna operates in SAS mode from 2.4–10.6 GHz and for SMD1-OFF, SMD2-OFF states antenna operates in slot mode, resulted in band-rejection from 2.7–4.3 GHz. For aforementioned states LP patterns are observed. At [(SMD1-OFF, SMD2-ON) and (SMD1-ON, SMD2-OFF)] states, the antenna asserts CP with minimum 3-dB axial ratio at 6.05 GHz and 9.31 GHz, respectively, where the polarization sense is electronically reversed asserting dual-sense CP . Additionally, it shows band-rejection from 2.5–5 GHz for (SMD1-OFF, SMD2-ON) state and 3.6–4.8 GHz for (SMD1-ON, SMD2-OFF) state. A prototype antenna of size is fabricated and measured to be potentially used in cognitive radio systems and UWB applications.

Design of UWB Slot Antenna for WBAN Application

Design of UWB Slot Antenna for WBAN Application

Design and Performance of UWB Wide Slot Antenna to Detect the Breast Cancer in Women

Breast cancer is one of the fatal diseases that greatly contribute to the death of many women across the nations. Basically, breast cancer can be detected using a wide slot UWB antenna. In this paper the performance of both antennas like wide slot and stacked patch are used to compare the detection of breast cancer. The specific absorption rate of both antennas is calculated in a normal tissue and tumors tissue, the result is contrast. From this comparative study it’s clear that wide slot UWB antenna has outstanding performance in this UWB frequency range and the size of the antenna is three times smaller when compared to the size of the stacked patch antenna. The performances of both the antennas were analyzed and the result suggests that the wide slot antenna performs better than the further antenna.

Design of CPW Band Notch Slot UWB Antenna at 8.7 and 10.2 GHz for Wireless Broadband Applications

Design of CPW Band Notch Slot UWB Antenna at 8.7 and 10.2 GHz for Wireless Broadband Applications

Co-designed defected ground structure filter with UWB slot antenna

Co-designed defected ground structure filter with UWB slot antenna

On Design of Modified Hexagonal Slot UWB Antenna with Band Notched Characteristics

On Design of Modified Hexagonal Slot UWB Antenna with Band Notched Characteristics

Band-notched ultrawide band antenna loaded with ferrite slab

In this paper, a novel technique to design a band-notched UWB antenna by using Yttrium Iron Garnet (YIG) ferrite is proposed. A printed slot UWB antenna with size of 21mm×26 mm×0.8 mm is adopted as a basic antenna. A piece of ferrite slab with size of 5 mm×10 mm×2 mm is attached on the feeding layer of the antenna to achieve band-notched characteristics. The measured -10 dB bandwidth of the antenna without ferrite slab is 2.91-10.98 GHz. With loading of ferrite slab, the bandwidth turns to 2.73-5.12 and 5.87-10.78 GHz. A band notch of 5.12- 5.87 GHz is achieved to filter WLAN 5 GHz (5.15-5.825 GHz) band. The proposed technique has virtue of easy fabrication and keeping antenna miniaturization.

A Novel Structure and Design Optimization of Compact Spline-Parameterized UWB Slot Antenna

Abstract In this paper, a novel structure of a compact UWB slot antenna and its design optimization procedure has been presented. In order to achieve a sufficient number of degrees of freedom necessary to obtain a considerable size reduction rate, the slot is parameterized using spline curves. All antenna dimensions are simultaneously adjusted using numerical optimization procedures. The fundamental bottleneck here is a high cost of the electromagnetic (EM) simulation model of the structure that includes (for reliability) an SMA connector. Another problem is a large number of geometry parameters (nineteen). For the sake of computational efficiency, the optimization process is therefore performed using variable-fidelity EM simulations and surrogate-assisted algorithms. The optimization process is oriented towards explicit reduction of the antenna size and leads to a compact footprint of 199 mm2 as well as acceptable matching within the entire UWB band. The simulation results are validated using physical measurements of the fabricated antenna prototype.

Structure and design optimisation of compact UWB slot antenna

A structure and computationally efficient design optimisation procedure of a novel miniaturised UWB slot antenna has been proposed. Upon geometry parameter adjustment, the structure exhibits a very small footprint of just 161 mm2. This has been achieved by introducing sufficient number of degrees of freedom, including the parameterised multi-section slot and a multi-section load of the feed line as well as efficient numerical optimisation of all relevant geometry dimensions of the structure. The design process has been formulated as explicit size reduction problem. The electrical performance parameters (here, a maximum in-band reflection) are controlled by suitably defined constraints. The final design has been verified through full-wave electromagnetic simulation as well as physical measurements of the fabricated antenna prototype.

Planar microstrip‐fed broadband circularly polarized antenna for UWB applications

ABSTRACTA microstrip‐fed UWB slot antenna with wide axial ratio is presented in this letter. The proposed antenna design comprises of an asymmetrical slot excited by an asymmetrical feed. The introduced asymmetrical nature alters the magnitude and phase of orthogonal E‐field components of the resonant modes generated. The asymmetry across the slot arms improves the axial ratio bandwidth (ARBW). The mechanism of obtaining circular polarization is discussed in detail and the steps taken for the improvement of ARBW is presented. The measured results of the proposed antenna have a wide impedance bandwidth (S11 < −10 dB) from 2.5 GHz to 12 GHz with ARBW of 81.1% (3.2 GHZ to 7.6 GHz). The antenna possesses the features like compact size (40 mm × 40 mm × 1.58 mm), low cost (FR4 substrate, ɛr = 4.4, tan δ = 0.02) and have easy integrability. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1088–1093, 2016

Design of small dual band‐notched UWB slot antenna

The design of a small printed slot antenna for ultra-wideband application is presented. The antenna is simply formed by an L-shaped slot embedded at the centre of the ground plane, a 50 Ω microstrip-fed line, a rectangular slit connected with the L-shaped slot and another rectangular slit at the bottom of the ground plane. The antenna has small dimensions of 16 × 28 × 0.8 mm3. The impedance bandwidth with 10 dB return loss of the antenna is from 3.1 to 10.6 GHz, in which there is two rejected bands which cover 3.3–3.73 and 5.15–5.9 GHz.

An UWB slot antenna without stub tuning

ABSTRACTA slot omnidirectional wide‐band antenna without stub tuning is proposed. The antenna is fed with a slot waveguide, performing from 1.9 to 6.6 GHz and gain from 2 to 5 dB over the bandwidth. One of the main advantages is the small amount of parameters of the structure to modify and optimize, reducing the design complexity. The idea emerges from a complement of an UWB planarized elliptical monopole. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2658–2662, 2015

Wide Band CPW Fed Slotted Microstrip Antenna

In this paper, a design of compact coplanar waveguide fed UWB slot antenna is presented. The proposed antenna has simple structure consisting rectangular slot with uneven coplanar ground structures. The proposed antenna structure is investigated by using MoM based electromagnetic solver IE3D. The simulation and measured results show that the antenna offers performance for wideband system from 4.5 GHz to11.8 GHz with return loss better than -10dB over the frequency spectrum with VSWR less than 2.5. The antenna configuration would be quiet useful for indoor applications. The antenna is fabricated and simulated. Measured results show a good agreement with simulated results. DOI: http://dx.doi.org/10.11591/telkomnika.v15i1.8078

Microstrip‐line FED beak‐shaped monopole‐like slot UWB antenna with enhanced band width

ABSTRACTA novel microstrip‐line fed beak‐shaped monopole‐like slot UWB antenna is proposed for enhanced ultrawideband, bluetooth, GPS, and GSM applications. In which, a beak‐shaped radiating patch is fed by a microstrip‐line and a square ground plane is defected by etching a hexagonal slot. Two triangular slots in the beak‐shaped radiator and hexagonal‐shaped defect in the ground plane are used to obtain GPS (1520–1590 MHz), GSM (1770–1840 MHz), and bluetooth (2385–2490 MHz). Furthermore, the bandwidth of an antenna is increased by etching a triangular slot at the junction of patch and feeding line. The antenna is fabricated on 1.6 mm thick commercial available FR4 material. The antenna offers an enhanced bandwidth of 24.26 GHz from 0.24 to 24.5 GHz with the voltage standing wave ratio <2. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2624–2628, 2014

A simple planar monopole UWB slot antenna with dual independently and reconfigurable band-notched characteristics

An extremely simple and compact planar monopole ultrawideband UWB slot antenna with dual band-notched characteristics is proposed. The antenna is composed of a circular radiation patch, a microstrip-fed line, and a partial ground. By etching an arc-shaped slot on the radiation patch and a C-like slot on the feed line, dual notched frequency bands at 3.3-3.7 GHz for WiMAX and 5.15-5.825 GHz for WLAN are achieved. And, the two notched bands can be adjusted independently by varying the length of the slots. Moreover, the band-notched characteristics can be reconfigurable by shorting the corresponding slots. So, the antenna is capable of operating in one of multiple modes which makes it an excellent candidate for UWB applications. Meanwhile, experimental results indicate that the antenna has an available impendence bandwidth from 2.9 to 11 GHz which covers the UWB frequency band, and nearly omnidirectional patterns, stable gains, small group delay in operating band except rejected bands. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:706-712, 2014.

ULTRA WIDE BAND RADAR BASED BREAST CANCER DETECTION USING STACKED PATCH AND WIDE SLOT ANTENNA

A wide slot UWB antenna is used for the detection of breast cancer .This method works on the principle of ultra wide band radar imaging technique. In this paper comparing the performance of both stacked patch and wide slot antenna used for the purpose of breast cancer detection. Calculating specific absorption rate of both antenna, when it is placed in a normal tissue and tumors tissue, and comparing its results .And also measuring certain parameters of both simulated and measured results. From this comparative study its clear that wide slot UWB antenna has excellent performance in this UWB frequency range. And also wide slot antenna is three times smaller than stacked patch antenna.