Super Wideband Monopole Antenna Research Articles

Super wideband with band rejection characteristics circular patch monopole antenna for 5G and beyond

A super wideband monopole antenna design for microwave and advanced wireless applications in the frequency range of 2.2 GHz to 27.06 GHz. At first, a circular resonator with a ring dimension is used to achieve a wideband range of frequency with a band rejection characteristic in the lower band. Where the antenna provides broadband from 2.2 GHz to 27.06 GHz with four notch bands covering 12.26–14.44 GHz, 17.39–19.60 GHz, 2.69–4.36 GHz, and 5.5–7.14 GHz. These notch band frequencies are productively used to evacuate undesired interference of different wireless frequencies. Additionally, six symmetrical tiny circle stubs are introduced in the ground plane to improve the overall characteristic without notch bands. The combination of the ring patch with the line feed broadens the stable radiation, super bandwidth, and stable gain characteristics. The overall electric size of the antenna is where the maximum gain is 6.4 dBi in between the higher frequency band and 4 dBi from 2.6–5.7 GHz. The proposed antenna exhibits a novel structure and achieves a wide bandwidth without using any external electronics components. The overall fractional bandwidth is more than 166% and excellent performance enters the wireless frequency band. The proposed structure was designed and fabricated to be experimentally validated and could be applied in various wireless components and applications.

A novel method for optimization of flat monopole antennas with the help of a universal definition for geometric shapes

In this research, a novel method is proposed optimization of flatted ultra-wideband monopole antennas. In this method, the shape of the antennas is described in general terms. This general description allows the antennas to take all kinds of shapes during the optimization process and finally, an optimal form for an ultra-wideband monopole is obtained. The parameters of this general description are obtained according to the design constraints in a two-stage optimization process (including global and local optimization). The optimization to achieve the acceptable impedance matching in the working band and reduction of the distortion of the radiation waves is to be done. Due to the efficiency of the optimization method, by applying strict-tightening constrictions on the size of the antenna, smaller antennas with the same performance as the best flat monopole antennas are designed. The main optimization program runs in Matlab Software, but the analysis of antennas at each stage of optimization is executed in the CST Microwave Studio Software. For this purpose, with the help of Visual Basic for Applications programming, an automated link is created between the MATLAB Software and CST Microwave Studio Software. The optimization results showed the ability of this method to design very small antennas with desired functional characteristics. The results showed that the return loss for the entire operational spectrum is below − 10 dB. Also, the correlation coefficient of the proposed planar super wideband monopole antenna has different values in different radiation angles.

A Compact SWB Monopole Antenna and FSS for Gain Enhancement

In this research, a compact super-wideband monopole antenna is introduced. The antenna's electrical dimensions are 0.228λ × 0.144λ × 0.009λ, the λ represents the wavelength of the lowest operating frequency. The suggested antenna achieves a single operating band 10 dB between 2.8 and 40 GHz, a percentage bandwidth of 173.83%, and a BW ratio greater than 10:1. The suggested super wideband antenna has a large BDR of 5432.18 and a maximum gain of 6.6 dB. The antenna features a U-shaped radiating element and a rectangular, chamferedcornered partial ground plane to attain super wideband characteristics. The antenna has been designed to be compact and flat in structure while still providing adequate gain and a broad range of frequencies, which makes it suitable for a variety of uses in contemporary wireless communication. To increase the antenna, gain for ultrawideband applications, an FSS is developed. The FSS has a compact unit cell with physical dimensions of 18 x 18 mm2 . When the FSS is used as a substrate, the antenna reaches a maximum realized gain of 10 dB. Additionally, at UWB frequencies, a gain amendment of up to 4.61 dB is observed.

A SUPER-WIDEBAND QUADRATIC BEZIER OUTLINE ANTENNA FOR THZ APPLICATIONS

This paper describes a novel Super-Wideband monopole antenna for THz applications. It has a Super-Wideband performance (3-16 THz) and up, which presents a fractional bandwidth greater than 135%. It has 2:1 VSWR with 10 dBi peak realized gain and flat group delay. These results satisfy the frequency and time-domain characteristics of the antenna. The radiator and ground plan of the antenna are based on quadratic Bezier outlines, which can be optimized with few control points. The proposed antenna is designed on Rogers RT5880 substrate (εr = 2.2) with a very compact size (42 × 32 × 1.6 μm<sup>3</sup>). Therefore, this antenna can be used in THz wireless communication systems such as T-WPAN, T-WBAN, and T-WLAN. It can be employed as an elementary antenna on MIMO systems

Compact Planar Super-Wideband Monopole Antenna with Four Notched Bands

A compact-sized planar super-wideband (SWB) monopole antenna with four notched bands is presented in this paper. The antenna consists of a rectangular ground plane and a circular radiator that is fed by a tapered microstrip feed line. The overall size of the antenna is 18 mm × 12 mm × 0.5 mm, and its impedance bandwidth (S11 ≤ −10 dB) ranges from 2.5 GHz to 40 GHz (bandwidth ratio of 16:1). Four notched bands are obtained using two inverted U-shaped slots, a split-ring resonator (SRR), and a meandered slot. The notched frequency bands can be adjustable by changing the parameters of parasitic slot elements, and the realized notched bands in this paper are Wi-MAX band (3.5 GHz), WLAN band (5.5 GHz), satellite communication X-band (7.5 GHz), and amateur radio band (10.5 GHz). The simulated and experimental results show good agreement with each other. The antenna possesses a high gain, super-wide impedance bandwidth, and omni-directional radiation patterns.

Integrated bluetooth/LTE2600 superwideband monopole antenna with triple notched (WiMAX/WLAN/DSS) band characteristics for UWB/X/Ku band wireless network applications

In this manuscript, a compact superwideband monopole antenna with triple notched band characteristics is presented and is experimentally investigated. Proposed antenna is also suitable for lower band of applications including Bluetooth and LTE2600 bands. Superwideband bandwidth with bandwidth ratio ≥ 10:1 is obtained by using two identical ellipse which are placed at 70° with reference to major axis. A fractal stub is used to notch WiMAX interfering band while WLAN and DSS bands are notched by etching modified rectangular slots on the radiating patch. Antenna also constitutes slotted ground with chamfered corners for better matching of impedance. Proposed antenna is also investigated in terms of frequency, time and space domain. Antenna offers a wider superwideband bandwidth with VSWR ≤ 2 for 2.34 GHz to 20.00 GHz. In time domain, antenna offers constant group delay in entire operating bandwidth and acceptable impulse response for input signal. Also, antenna offers maximum gain of 4.98 dBi and radiation efficiency of 89%. Stable radiation pattern and above features of proposed antenna suggest antenna to be a good candidate for numerous applications in wireless system.

High Isolation Superwideband Monopole Antenna with Mitigation of Dual Interfering Bands (WiMAX/C and Satellite Communication System in X Band) for Wireless Applications

In this manuscript, a dual notched superwideband Multiple-Input-Multiple-Output (MIMO) monopole antenna is verified in frequency, time and spatial domain. Antenna occupies space of 18340.787 mm3 and is printed on (Rogers RT Duroid5880) microwave substrate. Proposed antenna is capable of covering bandwidth 2.66 GHz–22.31 GHz with bandwidth ratio > 10:1. Proposed antenna rejects WiMAX/C band (3.28 GHz–4.36 GHz) which is obtained by using L-shaped stub connected with ground and X-band satellite downlink/uplink interference is removed by etching inverted U-shaped slit in microstrip feedline. Also, antenna offers maximum gain of and radiation efficiency of 5.30 dBi and 96.20% respectively in operating band. Proposed antenna also shows good diversity performance in terms of ECC (Envelope Correlation Coefficient), DG (Directive Gain) and TARC (Total Active Reflection Coefficient).

A Compact Monopole Antenna for Super Wideband Applications

A planar microstrip-fed super wideband monopole antenna is initially proposed. By embedding a semielliptically fractal-complementary slot into the asymmetrical ground plane, a 10-dB bandwidth of 172% (1.44-18.8 GHz) is achieved with ratio bandwidth >;12:1. Furthermore, the proposed antenna also demonstrated a wide 14-dB bandwidth from 5.4 to 12.5 GHz, which is suitable for UWB outdoor propagation. This proposed antenna is able to cover the DVB-H in L-band (for PMP), DCS, PCS, UMTS, Bluetooth, WiMAX2500, LTE2600, and UWB bands.