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The paper proposes a new beam-switchable dipole antenna. The functionability is realized by reconfiguring the state of the four side apertures of a square substrate integrated waveguide (SIW). Four wide dipoles are loaded in front of the four apertures. The selected radiating aperture is able to excite the corresponding loaded dipole. The other dipoles work as reflectors. Thus, directional radiation...
The bandwidth of a broadband dual-polarized antenna is enhanced by adding two parasitic elements: a larger parasitic element below the dual-polarized element and a smaller parasitic element above the dual-polarized element. The bandwidth enhanced dual-polarized antenna covers the frequency range from 1.5 to 2.7 GHz with good performance.
A modified dipole form of the PICA (planar inverted cone antenna) is presented for EMC measurements in this communication. By simply getting the whole structure halved, a further step towards miniaturization has been taken. The half-cut antenna shows over a decade impedance bandwidth while offering a 50% reduction in the size compared to the full version and having stable directional radiation pattern...
This paper presents a high-gain millimeter-wave array antenna highly integrated on a single organic chip package. The multi-phased beam steering capability is enabled to reduce multipath fading and over-the-air applications around 30GHz. To improve antenna bandwidth, gain and radiation efficiency, a dual-patch antenna is built on a superstrate structure. A number of design attributes, such as patch,...
In this paper, a wide-band circularly polarized (CP) crossed dipole antenna is proposed. The CP crossed dipole antenna is backed by a cavity reflector to achieve wide-band CP radiation with enhanced gain and uni-directional pattern accompanied by high front to back lobe ratio. A comprehensive study on the effect of the vertical walls of the cavity reflector on the CP radiation performance has been...
This paper presents two antenna design, the first antenna design a dipole antenna made of two material, aluminum and iron to works at TV channel frequency (450MHz-950MHz) in Jakarta, Indonesia. The second antenna design is a rectangular microstrip antenna with line feed method for radar application such as weather radar working on S-band at 3GHz frequency, we used rectangular shape because it is the...
This paper presents the design of a planar, low-profile, high-gain, wide-gain-bandwidth metasurface antenna with a multiple feeding structure. The antenna structure consists of a 5×5 array of square patch metasurface and a planar feeding structure, both of which are patterned on a high-permittivity, electrically thin, GaAs substrate. The metasurface is etched on the top side of the substrate, while...
This paper presents a dipole antenna as a feed of extended hemispherical lens for 60 GHz applications. This structure employs lens structure for gain enhancement and a dipole antenna as a beam launcher. Electromagnetic simulations of the proposed structure, including optimization of the extended lens length, are performed by CST. Throughout this paper, the design process of the proposed 60 GHz antenna...
Propagation of underwater electromagnetic signals for real-time transmission and reception of data gathered during a survey mission between an Autonomous Underwater Vehicle (AUV) and underwater sensor nodes or a docking station, continues to generate a lot of interest worldwide. To this end, underwater antennas will play a significant role in ensuring good data rates and propagation distances for...
In this paper, an infinite linear tightly coupled dipole array (TCDA) based on interdigital structure is investigated and a resistive FSS is incorporated into the linear array to expand the bandwidth. Traditional fabrication method of the resistive FSS is using resistive material, but it is expensive and complicated. To address this issue, a method of fabricating the resistive FSS by lumped resistors...
In nowadays communication systems, the size and performance of antennas are simultaneously required, since there is a tremendous demand for an ultra-wideband, compact and efficient antenna structures that may perform at all desired sub-bands starting from LTE (780MHz) up to WiMAX applications (5.5 GHz) with a good level of radiation efficiency and dimensions not exceeding 130mm∗100mm∗10mm. All these...
A reconfigurable radiation pattern antenna is constructed using half-wave dipole antenna. Metal cylinders with pin diodes are added around the dipole antenna acted as reflector and cause the change in radiation pattern for particular direction. The reconfigurable antenna works up to 32 directions with minimum beam separation of 10°.
A novel polarization rotation technique based on an artificial magnetic conductor (AMC) structure is proposed. A new polarization-rotation AMC (PRAMC) with a height of only 0.04 λ0 is designed and a large polarization rotation bandwidth of 29.1% can be achieved. Firstly, the PRAMC is applied to design a low-profile circularly polarized dipole antenna with a broad axial ratio bandwidth and beamwidth...
In this paper, an ultra-wideband (UWB), wide-scan tightly coupled dipole array (TCDA) is designed. The dipole elements and the integrated baluns are printed on a vertical printed circuit board (PCB) backed with a ground plane. Two wide-angle impedance matching (WAIM) layers over the array aperture are used to achieve broadband and wide-angle scanning. The antenna is excited by a coaxial line with...
A new robust design of the printed phased antenna array was developed and investigated. Results of numerical prediction of radiation, matching and scanning characteristics of a single printed bow-tie antenna and a new design of phased antenna array composed of these radiating elements are presented.
In this paper, a compact quasi-isotropic antenna with enhanced bandwidth for radio frequency (RF) energy harvesting applications is presented. The quasi-isotropic pattern is achieved using split ring resonators (SRRs) and the folded dipole structure. Two folded split ring resonators (FSRRs) are implemented orthogonally to reduce the mutual coupling, and each resonance is placed closely to widen the...
In this paper, bow-tie antenna with defected ground structure (DGS) has presented. The radiating element is bow-tie antenna, two concentric ring slots are presented on it for producing the circular polarization (CP). Rectangular patch is loaded to bow-tie antenna for enhance the gain. On the ground plane four equal bow-tie slots are considered for enhancing the impedance bandwidth upto 10.3%. It is...
A conventional symmetric Zig-zag antenna is improved by adding a shunt shaped dipole at the feeding terminals or a shaped dipole as parasitic reflector, this dipole results in an increment of radiated gain in forward direction while remaining the wider frequency bandwidth of Zig-zag antenna. By means of the method of moments with piecewise-sine bases and Galerkin's procedure, the Zig-zag structure...
A new type of broadband miniature antenna consists of helical dipole folded by central conductor is presented in this paper. Besides a brief analysis, the experimental results show the good performances of wider bandwidth (25%–40%), higher input impedance(about 200 Ohms), and flexible for designing, it is suitable to be used as both mobile vertical antenna and excitor of Yagi antenna.
This paper introduces a broadband conductor-backed coplanar waveguide (CBCPW) to double-sided parallel strip line (DSPSL) transition structure. The performance is demonstrated in a back-to-back (B2B) configuration on 0.127 mm thick FR408 with relative permittivity of 3.75 and loss tangent of 0.018. AWR AXIEM and ANSYS HFSS simulations have been used to optimize all the structures. Simulation and measurement...
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