A coplanar waveguide bow-tie aperture antenna

International Journal of Antennas and Propagation

This paper presents a new design of a compact, high-gain coplanar waveguide-fed antenna and proposes a multielement approach to attain enhanced characteristics. The proposed method overcomes the simulation and geometrical complexity and achieves optimal performance features. The antenna prototype is carefully designed, and simulation results have been analyzed. The proposed antenna was fabricated on a new WangLing TP-2 laminate with dimensions (0.195λ × 0.163λ × 0.0052λ) at the lowest resonance of 9.78 GHz. The results have been tested and experimentally verified. The antenna model achieved excellent performance including a peak realized gain better than 9.0 dBi, optimal radiation efficiency better than 87.6% over the operating band, and a good relative bandwidth of 11.48% at 10 dB return loss. Symmetrical stable far-field radiation pattern in orthogonal planes and strong distribution of current are observed. Moreover, a comparative analysis with state-of-the-artwork is presented. T...

Progress In Electromagnetics Research, 2004

The characteristics of a bow-tie slot antenna with tapered tuning stubs fed by a coplanar waveguide (CPW) are investigated. The effects of the antenna dimensional parameters are studied through simulation results and design procedure is developed and verified for different frequency bands. The antenna shows wideband characteristics for radar and wireless communication applications.

Microwave and Optical Technology Letters, 2003

A small multi-slot antenna is designed for RF and micro- wave sensors and radar applications. The design was realized using a se- ries of parallel slots with tapered lengths, fed by a coplanar waveguide (CPW) to support wideband operation. The designed multi-slot antenna provides a 50% bandwidth centered at 10 GHz with 50 input impedance. The operating bandwidth remains almost

Applied Sciences

In this work, the impact of substrate type and design dimensions on bow-tie microstrip antenna performance and bandwidth improvement is presented both numerically and experimentally at 4–8 GHz. The finite integration technique (FIT)-based high-frequency electromagnetic solver, CST Microwave Studio, was used for the simulation analysis. For this purpose, four bow-tie microstrip antennas were designed, fabricated, and measured upon using different materials and substrate thicknesses. Precise results were achieved and the simulated and experimental results showed a good agreement. The performance of each antenna was analyzed and the impact of changing material permittivity, antenna dimensions and substrate thicknesses on antenna performance were investigated and discussed. The measured results indicated that the slot bow-tie antenna, which is one of the novel aspects of this study, is well matched and a 2-GHz bandwidth [5–7 GHz] is obtained, which is about 50% bandwidth in comparison w...

IEEE Transactions on Antennas and Propagation, 1995

IEEE Transactions on Antennas and Propagation, 2010

The analysis, design, and realization of a modified bow-tie antenna optimized for impulse ground penetrating radar (GPR) applications is described. The proposed antenna shows improved properties important for GPR, which include its compact size (in comparison with a conventional bow-tie antenna) and ability to radiate UWB pulses with increased amplitude and very small late-time ringing. A substantial increase in the amplitude of the transmitted pulse is achieved by utilizing radiation from discontinuities introduced by the resistive loading employed in the antenna to suppress late-time ringing. By choosing an optimal distance between the antenna's feed point and the location of the resistive loading, radiations that occur from the antenna's feed point and the mentioned discontinuities at the resistive loading will combine constructively in the boreside direction of the antenna. As a result, one will observe a substantial increase of the amplitude of the transmitted pulse in the boreside direction. Furthermore, an analytical expression describing approximate time-harmonic current distribution is derived to indicate an optimal resistive loading profile for the proposed antenna. Additionally, the traveling-wave current distribution of the antenna is theoretically analyzed to examine the applicability of the obtained time-harmonic expression for pulse excitation. It has been found that when the antenna is resistively loaded both the time-harmonic and traveling-wave currents decay to approach nearly the same value at the end section of the antenna. As the amount of current at the antenna ends corresponds to the level of reflection which occurs there, the derived expression is found to be useful to indicate an optimal loading profile for the proposed antenna. A theoretical model of the proposed antenna has been developed to perform numerical analysis using a modified NEC-2 code. In addition, an experimental verification has been carried out and both the simulation and experiment confirmed the improved properties of the proposed antenna.

Progress In Electromagnetics Research C

A design of a modified bow-tie slot loaded wideband antenna using a Substrate Integrated Waveguide (SIW) cavity is proposed in this paper. The simple bow-tie slot perturbs the current distribution of the TE 120 mode, which generates two hybrid modes, namely odd TE 120 and even TE 120 modes at 9.6 GHz and 10.8 GHz, respectively, but the achieved bandwidth is only 500 MHz (5.2%). To increase the bandwidth, a short rectangular slot is incorporated at the middle of the bow-tie slot, which moves the hybrid odd TE 120 mode to 10.2 GHz, near even TE 120 , which helps to achieve a wide bandwidth of 1.1 GHz ranging 9.9 GHz-11 GHz (10.5%), and also it exhibits a unidirectional radiation pattern. The proposed antenna is fabricated for experimental validation of the modified bow-tie slot antenna. The measured value of bandwidth is 1.1 GHz from 10.1 GHz to 11.2 GHz (10.3%) with a consistent gain of 6.25 dBi, and the variation between co-pol and cross-pol is maximal. Because of the wide bandwidth, high gain, and compactness, the suggested antenna is suitable for satellite, radar, and all practical wireless applications of X-band frequencies.

Microwave and Optical Technology Letters, 2004

2019

This paper explore the design of aperture-coupled slot antenna with the usage of Co-Planar Waveguide (CPW) feeding with finite ground plane is proposed. The proposed design of antenna offers suitable impedance matching, unidirectional radiation sample and occasional go polarization. The antenna become analysed with extraordinary dimensions of slot with specific geometries and the effect of evaluation is carried out on this paper. Simulation effects are obtained thru rectangular aperturecoupling of width λg/4 with slits at the ground plane fed by CPW. Using substrate of different substances FR-4 and RT Duroid analysis of the advantage of an antenna is finished the use of CST software program. Slot antenna with coplaner waveguide (CPW) feeding is favoured Due to low dispersion and simplicity of integration with various energetic and passive gadgets. The ground plane is added at the back side of the substrate. This ground plane behaves as reflector this results in maximum Directivity i...

PLoS ONE, 2017

A printed Bow-Tie slot antenna with loaded stub is proposed and the effects of changing the dimensions of the slot area, the stub and load sizes are considered in this paper. These parameters have a considerable effect on the antenna characteristics as well as its performance. An in-depth parametric study of these dimensions is presented. This paper proposes the necessary conditions for initial approximation of dimensions needed to design this antenna. In order to achieve the desired performance of the antenna fine tuning of all sizes of these parameters is required. The parametric studies used in this paper provide proper trends for initiation and tuning the design. A prototype of the antenna for 1.7GHz to 2.6GHz band is fabricated. Measurements conducted verify that the designed antenna has wideband characteristics with 50% bandwidth around the center frequency of 2.1GHz. Conducted measurements for reflection coefficient (S 11) and radiation pattern also validate our simulation results.

— A modified bow-tie slot antenna fed by a microstrip to coplanar waveguide (CPW) transition, is designed for wide band operation. The design is suitable to be included in arrays for applications in radar and wireless communications, providing a possibility to be utilized in experiments based on studies of the cosmic microwave background (CMB). Simulation results in this study show around 43% bandwidth with VSWR < 2 in the frequency range from 25 to 40 GHz.

Progress In Electromagnetics Research M, 2021

A unique bow-tie shaped pentagonal slit microstrip patch antenna has been particularly developed, manufactured, and tested for defense applications such as gunner training systems. The substrate is made of 3.2 mm thick FR4 material with a dielectric constant of 4.3. With a conductivity of 5.96 × 10 7 Siemens/m copper is used as a pentagonal bow-tie patch. During the training period of MANPADS, previously wired system is used, and it is replaced by a completely wireless system with a specially designed antenna along with an ultrasonic sensor and processor unit. The innovation of antenna is pentagonal slit created on patch, and it increases fringing effects. It attains 6.523 GHz with a return loss of −22.5 dB, maximum gain of 5.84 dB, and better VSWR of 1.16. CST Microwave Studio 2016 simulates the proposed antenna characteristics such as gain, return loss, radiation pattern, and VSWR.

Research Journal of Applied Sciences, Engineering and Technology, 2015

A compact CPW-FED monopole antenna for wireless communication applications is presented in this study. The proposed antenna models consisting of very compact size of 27.5×13 mm on RT-Duroid substrate of ε r = 2.2 with thickness of 1.6 mm. The proposed antenna structures cover the frequency bands of C and Ku. In addition, the antenna exhibits monopole like radiation characteristics and good antenna gain of more than 1.6 dB in c-band and 2.79 dB in Ku-band, which is suitable to integrate with the devices for wireless communication devices for communication system applications.

UWB Communication Systems have recently attracted considerable research effort for their potential advantages of high data rate and low energy density. As one of the key components of an UWB system antennas with wide impedance bandwidth, stable gain and VSWR are required. Bow-Tie antenna is a good choice of UWB antennas. In this paper a Bow-Tie antenna is designed and modeled by using WIPL-D for a wide frequency range (3.1 to 10.6 GHz). The general characteristics of the antenna such as Gain, Impedance and VSWR are analyzed.