Wideband and UWB antennas for wireless applications. A comprehensive review

A comprehensive review concerning the geometry, the manufacturing technologies, the materials, and the numerical techniques, adopted for the analysis and design of wideband and ultrawideband (UWB) antennas for wireless applications, is presented. Planar, printed, dielectric, and wearable antennas, achievable on laminate (rigid and flexible), and textile dielectric substrates are taken into account. The performances of small, low-profile, and dielectric resonator antennas are illustrated paying particular attention to the application areas concerning portable devices (mobile phones, tablets, glasses, laptops, wearable computers, etc.) and radio base stations. This information provides a guidance to the selection of the different antenna geometries in terms of bandwidth, gain, field polarization, time-domain response, dimensions, and materials useful for their realization and integration in modern communication systems

A novel compact fractal UWB antenna with triple reconfigurable notch reject bands applications

A compact, circular UWB fractal antenna with triple reconfigurable notch rejection bands is proposed. It rejects the crowded frequency bands WiMAX, WLAN and X band interferences produced in UWB communication systems. The proposed fractal structure consists of a basic circular patch with circular fractal iterations. By employing this new structure of fractals, the overall size of antenna is reduced 53% to 21 × 25 mm, in comparison with traditional circular monopole antenna. The implemented antenna operates at 3.1–10 GHz. Re-configurability is realized by designing slots and split ring resonators in desired frequencies with the attached PIN diodes. WLAN band rejection was realized by creating a pair of optimized L-shaped slots in the ground plane. By etching a split ring resonator and a U-shaped slot, X and WiMAX bands were also rejected. Furthermore, by attaching diodes to aforementioned slots and designating the diodes on/off, different bands can be included or rejected. In time domain, the antenna properties are evaluated by a figure of merit called fidelity factor. Finally, the antenna properties are measured in anechoic chamber and the results agrees with simulation findings

CPW-Fed Microstrip Patch Antenna for Millimeter Wave Applications

The antenna elements have been consuming more power and inoperative area with high operational frequency. Therefore, an advanced antenna element design is necessary to cross over the above faults. In this research work, the CPW-Fed microstrip patch antenna is designed using EHF range for millimeter-wave applications. CPW-fed and combinations of DGS-CPW-fed microstrip patch antennas are novel methods, these designs are enhancing many characteristics of microwave circuits, such as narrow bandwidth, cross-polarization, low gain, etc. The researchers are facing many issues in this research area, therefore Fed-CPW design has been taken as a challenging issue. Investigators are working on wideband antennas, as well as patch antennas that can be used for both single- and dual-band applications. In addition to multiband applications, DGS, CPW-Fed Slot antennas are loaded with filters, these enhancements are providing waveguides and amplification tuning. The proposed research deals with a CPW-Fed Microstrip Patch satellite antenna, which is specially modeled to operate at various high-frequency values as well as Extremely High Frequency (EHF) range. A T-Shaped Microstrip patch antenna, which is dimensioned at 11.4x2.5x1.6 mm3 has been placed on Rogers R04003 substrate. The proposed antenna has CPW-Fed with ground dimensions which are considered as 5.9mm*8mm & feed dimensions as 3.8mm*9mm. Due to CPW-feed, the proposed antenna has achieved huge bandwidth i.e 13GHz. Hence the proposed antenna design is compact and suitable at higher frequencies. Simulation results approve that it is a good antenna model. The performance measures like return loss, gain, and VSWR has been improved compared to earlier models. Moreover, this CPW-fed microstrip patch antenna approach is most useful for 5G applications and simulation results are outperforms with designed frameworks. The proposed antenna resonates from 24GHz to 37.6GHz, with good impedance matching at |S11|<=-10dB. The obtained VSWR is in the range of 1 and 2. The gain at resonant frequencies is ranged from 4 to 6 dB. The proposed antenna is useful to deploy in 5G applications as it is resonating in millimeter-wave frequencies. The following model is very useful for 5G applications and provides resonant frequencies 4 to 6 dB. The impedance matching is also improved by 15% compared to earlier models. The following experiment is designed on the HFSS software tool and CPW-Fed functionality is verified

CPW-Fed Microstrip Patch Antenna for Millimeter Wave Applications

The antenna elements have been consuming more power and inoperative area with high operational frequency. Therefore, an advanced antenna element design is necessary to cross over the above faults. In this research work, the CPW-Fed microstrip patch antenna is designed using EHF range for millimeter-wave applications. CPW-fed and combinations of DGS-CPW-fed microstrip patch antennas are novel methods, these designs are enhancing many characteristics of microwave circuits, such as narrow bandwidth, cross-polarization, low gain, etc. The researchers are facing many issues in this research area, therefore Fed-CPW design has been taken as a challenging issue. Investigators are working on wideband antennas, as well as patch antennas that can be used for both single- and dual-band applications. In addition to multiband applications, DGS, CPW-Fed Slot antennas are loaded with filters, these enhancements are providing waveguides and amplification tuning. The proposed research deals with a CPW-Fed Microstrip Patch satellite antenna, which is specially modeled to operate at various high-frequency values as well as Extremely High Frequency (EHF) range. A T-Shaped Microstrip patch antenna, which is dimensioned at 11.4x2.5x1.6 mm3 has been placed on Rogers R04003 substrate. The proposed antenna has CPW-Fed with ground dimensions which are considered as 5.9mm*8mm & feed dimensions as 3.8mm*9mm. Due to CPW-feed, the proposed antenna has achieved huge bandwidth i.e 13GHz. Hence the proposed antenna design is compact and suitable at higher frequencies. Simulation results approve that it is a good antenna model. The performance measures like return loss, gain, and VSWR has been improved compared to earlier models. Moreover, this CPW-fed microstrip patch antenna approach is most useful for 5G applications and simulation results are outperforms with designed frameworks. The proposed antenna resonates from 24GHz to 37.6GHz, with good impedance matching at |S11|<=-10dB. The obtained VSWR is in the range of 1 and 2. The gain at resonant frequencies is ranged from 4 to 6 dB. The proposed antenna is useful to deploy in 5G applications as it is resonating in millimeter-wave frequencies. The following model is very useful for 5G applications and provides resonant frequencies 4 to 6 dB. The impedance matching is also improved by 15% compared to earlier models. The following experiment is designed on the HFSS software tool and CPW-Fed functionality is verified