Compact UWB Antenna Research Articles

A High Gain and Compact CPW-fed UWB Antenna Based on a Novel Frequency Selective Surface with Angular Stability

A High Gain and Compact CPW-fed UWB Antenna Based on a Novel Frequency Selective Surface with Angular Stability

A gain enhancement of compact UWB antenna based on a single FSS layer

AbstractThe present work introduces a novel low‐profile antenna for UWB applications through the use of a frequency‐selective surface (FSS). The FSS reflector uses a 7 × 7 array with a unit cell of 12.4 × 12.4 mm. By incorporating this periodic structure, the antenna's peak gain reaches 11 dBi, covering a UWB frequency range from 3.01 GHz to 13.5 GHz. Both FSS and UWB antennae are printed on the same type of substrate (FR4‐epoxy). The gap between the FSS layer and antenna is a half wavelength (18 mm) to obtain the best performance. The fabricated optimized antenna prototype shows a reasonable accord between numerical and experimental results. These results are compared to the existing literature designs. Overall, the proposed antenna system has reduced complexity and size, while offering a very wide bandwidth and high gain, making it a good candidate for imminent wideband and high‐gain wireless communication systems.

An Ultra-Wideband Antenna with Triple Band-Notched Characteristics for Wearable Application

This work presents a compact UWB antenna with triple band-notched at WiMAX (3.2 GHz to 3.7 GHz), C-band (3.7 GHz to 4.2 GHz) and WLAN (5.15 GHz to 5.35 GHz) for wearable applications. The UWB antenna is fabricated on a semi-flexible thin FR-4 substrate. In order to reduce the complexity, only two slots are introduced on the radiating patch instead of three slots to reject each narrow band frequency. In this case, one slot rejects a combination of WiMAX and C-band and the other slot rejects the WLAN frequency band. The UWB antenna on the thin FR-4 material has an overall size of 21×16 mm2, which is very compact and thus, suitable for wearable applications without causing discomfort when worn on-body. Although the antenna is small in size, the performance is not compromised. The UWB antenna has the frequency range from 2.51 GHz to 12.09 GHz, maximum radiation efficiency of 100% and maximum gain of 4 dBi. Nevertheless, the antenna is able to reject the WiMAX and C-band as well as the WLAN band. The simulated specific absorption rate (SAR) results show that the antenna complies with the SAR limit Federal Communication Commission (FCC) and International Commission of Non-Ionizing Radiation Protections (ICNIRP) standards for 1 mW input power. Bending investigations performed on different diameters of Styrofoam cylinders shows that the frequency range and the notch bands are not very much affected.

UWB Antenna with Enhanced Directivity for Applications in Microwave Medical Imaging.

Microwave medical imaging (MMI) is experiencing a surge in research interest, with antenna performance emerging as a key area for improvement. This work addresses this need by enhancing the directivity of a compact UWB antenna using a Yagi-Uda-inspired reflector antenna. The proposed reflector-loaded antenna (RLA) exhibited significant gain and directivity improvements compared to a non-directional reference antenna. When analyzed for MMI applications, the RLA showed a maximum increase of 4 dBi in the realized gain and of 14.26 dB in the transmitted field strength within a human breast model. Moreover, it preserved the shape of time-domain input signals with a high correlation factor of 94.86%. To further validate our approach, another non-directional antenna with proven head imaging capabilities was modified with a reflector, achieving similar directivity enhancements. The combined results demonstrate the feasibility of RLAs for improved performance in MMI systems.

Design of compact UWB antenna using characteristic mode analysis and its quad-port MIMO realization with novel isolation technique

This paper presents a miniaturized Quad-Port MIMO antenna for UWB application. Employing Characteristic Mode Analysis, the single element UWB antenna is analysed to achieve a compact design. Using the Theory of Characteristic Mode, the significant modes and their current distribution are analysed, which helps to modify the radiator and ground plane to generate more significant modes to yield a wider frequency band. Four circular-shaped radiators with tapered feeds are placed orthogonally on the FR4 substrate to improve isolation, and partial ground planes are located on the opposite surface. Furthermore, a modified Pattee-cross-shaped parasitic element is introduced between the antenna elements and shorted with the ground planes via metallic shorting pins. This novel technique improves isolation compared to the conventional integration method of the partial ground planes through strip lines. The proposed antenna achieves less than −20 dB mutual coupling over most of the frequency band ranging from 2.51–18 GHz.

Design of compact slot antenna and octagonal blended shape antenna

ABSTRACT In this paper, two new compact halved-size single and UWB antennas are proposed for WiFi and UWB applications. The single-band compact halved size slot antenna is proposed for WiFi applications at 2.4 GHz. The resonant frequency of the conventional slot antenna can be reduced by cutting the antenna into two halves and without using any lumped elements inside the slot. Moreover, the impedance and radiation characteristics of the proposed halved-size antenna are suitable for WiFi applications at 2.4 GHz. The proposed WiFi antenna has a miniaturised size of 25 × 16.5 × 0.813 mm3. Then, an octagonal blended-shape antenna (OBSA) for UWB applications is proposed. The UWB band from 3.1 GHz to 10.6 GHz is encompassed by the halved-size OBSA using the same cutting concept. Furthermore, a grounded L-stub is added on the top side to improve the reflection coefficients. The proposed OBSA has a compact size of 28 × 13 × 0.813 mm3 with stable omnidirectional radiation patterns. Simulation and measured results are in good agreement.

Novel Compact UWB Antenna Design with Notch Filter Characteristics: Development and Performance Enhancement

Novel Compact UWB Antenna Design with Notch Filter Characteristics: Development and Performance Enhancement

A Compact Slotted UWB Antenna Based on Characteristics Mode Theory for Wireless Applications

The development of electronic systems and wireless communication has led to a proportional increase in data traffic over time. One potential solution for alleviating data congestion is to augment the bandwidth capacity. This study presents a novel asymmetric circular slotted semi-circle-shaped monopole antenna design using a defective ground structure. The extended ultrawide bandwidth is achieved by implementing a design where the semi-circle radiator is etched in a specific asymmetric circular slot. This involves etching a circle with a radius of 1.25 mm at the center of the radiator, as well as a succession of circles with a radius of 0.75 mm along the edges of the radiator. In addition, the ground plane is situated at a lower elevation and features a U-shaped truncation that has been etched onto its surface. The expansion of the impedance bandwidth can be accomplished by making adjustments to the radiator and ground plane. The UWB antenna under consideration possesses a geometric configuration of 21.6 × 20.8 × 1.6 mm3 and the antenna is fabricated using an FR-4 glass epoxy substrate. The UWB antenna operates throughout the frequency range of 2.2–16.5 GHz, exhibiting a gain of at least 3.45 dBi across the entire impedance bandwidth and the maximum peak gain of 9.57 dBi achieved at the mid-resonance frequency of 10.5 GHz. The investigation of the antenna’s physical properties is conducted utilizing characteristic mode analysis. The investigation also includes an analysis of the time-domain characteristics, revealing that the group delay was found to be less than 1 ns across the operational frequency range. The predicted and measured findings demonstrate consistency and confirm that the suggested antenna is suitable for electronic systems and wireless applications.

Compact Conformal UWB Antenna Design with Enhanced Gain Characteristics Using Double-Negative (DNG) Metamaterial Structure for Biomedical Applications

Compact Conformal UWB Antenna Design with Enhanced Gain Characteristics Using Double-Negative (DNG) Metamaterial Structure for Biomedical Applications

Design of a compact sigma slotted dual-mode UWB antenna for wireless body area network applications

Abstract This article presents the design of a novel sigma slotted circular monopole antenna for wireless body area network applications. The design is proceeded with a sigma-shaped slot etched on the circular radiator with Rogers 4003C substrate. The size of the proposed antenna is 30 × 30 × 1 mm3. With partial ground plane, the bandwidth characteristics of the antenna have been enhanced. The designed antenna covers 2–10 GHz of the ultra wideband, thereby providing more than 106% bandwidth. The antenna exhibits high gain values of 1.95, 3.23, 3.46, and 5.95 dB at 2.45, 3.45, 5.8, and 9.5 GHz, respectively. The proposed design operates on off-body mode at 2.45 GHz and on-body mode at 5.8 GHz, thus acting as a dual-mode antenna. To ensure the health and safety measure, specific absorption rate analysis was done for both low and high values of input power and also with Cartesian and cylindrical human arm models. Bending analysis was also done. The time domain parameter group delay was also analyzed for the proposed antenna for on- and off-body scenarios. The prototype was fabricated, and validation of simulation results was done for free space and on-body scenarios.

A Novel Compact TE-DGS UWB Antenna for Wireless Communication Applications

A Novel Compact TE-DGS UWB Antenna for Wireless Communication Applications

Design of a Novel Capsule-Shaped Compact UWB Antenna for 5G Wireless Applications

Design of a Novel Capsule-Shaped Compact UWB Antenna for 5G Wireless Applications

An ultra‐wideband compact design for hyperthermia: Open ridged‐waveguide antenna

Antennas are the building block of radiative hyperthermia (HT) applicators. This study proposes a compact UWB antenna specifically tailored to meet the requirements for deep HT array applicators. The proposed Open Ridged-Waveguide (ORWG) antenna, which is an adaptation of a double-ridged horn antenna, operates over the frequency band of 400–800 MHz. It was experimentally assessed as a single element. The quality metrics considered were reflection coefficient, penetration depth, effective field size (EFS), and mutual coupling. The design shows a 75.5% fractional bandwidth with a reflection coefficient measured to be below −10 dB from 367 up to 820 MHz. The EFS is greater than the physical dimensions of the 3-by-4 cm aperture. The mutual coupling between two adjacent elements in the array, measured in a flat phantom arrangement, is lower than −30 dB throughout the entire band. The antenna's performance was further tested in two deep HT scenarios in order to assess the mutual coupling and focussing abilities while in the array configuration. To this end, phased array applicators consisting of 10 and 16 ORWG antennas were simulated in CST, and the results are presented for a homogeneous cylindrical muscle phantom and a realistic patient model, respectively. The good agreement between the simulated and measured results suggests that the antenna can be successfully used for HT.

Correction to: A novel compact fractal UWB antenna with dual band notched characteristics

Correction to: A novel compact fractal UWB antenna with dual band notched characteristics

A novel compact fractal UWB antenna with dual band notched characteristics

A novel compact fractal UWB antenna with dual band notched characteristics

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

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

A Compact UWB Antenna Design for Breast Cancer detection

There are many diseases in the world. The mostcommon and dangerous disease is cancer and the number ofcancer patients is increasing and the number of deaths alsoincreased. If we detect the cancer at early stages, we can beable to reduce the deaths. In this paper, a rectangular fix receiving wire is intended to identify the disease at beginning phases and this increment the higher opportunity to recuperate from disease. The compact low profile wearable antenna is used to detect cancer. Microstrip patch antenna is used in this project because of lowprofile, low cost, miniaturization of antenna, high bandwidthand high gain. This antenna is compact because, IR can beeasily fabricated on the printed circuit board unlike otherantennas. The square fix is utilized to defeat the complex construction. The substrate utilized is FR4 epoxy with dielectric steady of 4.4 and digression deficiency of 0.02.

Design of UWB MIMO Antenna to Reduce the Mutual Coupling Using Defected Ground Structure

A novel compact monopole UWB antenna is described and analyzed using defect in ground plane (DGS). This MIMO design has an area of 60 × 35 mm2 with total size of 2100 mm2 which maintained between the square type patches seperation is 0.05 λ0. The current design achieved tri-band frequencies at 3.5, 4.8 and 9.0 GHz due to introducing arcs at the edges of square type patches. For the impedance bandwidth of the design covers an average peak gain of radaitor is 5.04 dBi with a little-bit variations in the current design is ± 1.20 dBi. The measured Impedance Bandwidths of the MIMO design are 1000 MHz (3.0–4.0 GHz), 1300 MHz (4.3–5.6 GHz) and 1100 MHz (8.4–9.5 GHz) covered the frequency range from 2.0 to 10.0 GHz. These frequencies covered the applications of WLAN, bluetooth and ultra-wide band which maintained VSWR ≤ 2. The proposed structure resembles a omnidirectional radaition patternswith narrow compact sizeat the resonant band of frequencies.

Design and Simulation of a Compact UWB Antenna for Wireless Applications

Design and Simulation of a Compact UWB Antenna for Wireless Applications

Closed Loop Resonator Based Compact UWB Antenna with Single Notched Band Varying between WLAN and X-band for UWB Applications

AbstractIn this paper, a novel compact UWB antenna with variable notched band characteristics for UWB applications is presented. The designed antenna primarily consists of an adjusted elliptical shaped metallic patch and a partial ground plane. The proposed antenna has a compact size of only 17 × 17 mm2. The suggested antenna covers the frequency range from 3.1 GHz to 12 GHz. A single notched band has been achieved at 7.4 GHz with the aid of integrating a novel closed loop resonator at the back plane of the antenna. This notched band can be utilized to alleviate the interference impact with the downlink X-band applications. Besides, a square slot was cut in the loop in order to obtain a variable notched band. With the absence and the existence of this slot, the notched band can be varied to mitigate interference of the upper WLAN band (5.72–5.82 GHz) and X-band (7.25–7.75 GHz) with UWB applications. A good agreement between measurement and simulation results was achieved, which affirms the appropriateness of this antenna for UWB applications.