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In this paper, a parasitic G-shaped microstrip patch antenna has been designed and simulated with both HFSS (High Frequency Structure Simulator) and CST Microwave Studio Softwares. Parametric analysis has been carried out to find optimized distances of the parasitic elements to achieve desired results. The proposed antenna is simple in design and compact in size and provides two separate impedance...
This paper presents a novel rectangular waveguide polarizer for Ka-band. The polarizer consists of corrugated waveguide with an elongated conductive plate in the axial direction. The combination of the corrugated and elongated conductive plates increases the phase difference, and decreases frequency deviation in wideband. Thus, low axial ratio and a short length are achieved. Analysis and measurements...
A polarized pyramid dielectric resonator antenna fed by rectangular slot aperture is presented. The proposed dielectric resonator with given width to length ratio is easy to generate left-handed circular polarization by clockwise rotation angle of 45°. By optimizing the design parameters, 3dB axial ratio bandwidth of 8.9% (8.86–9.68GHz, 820MHz) and impedance bandwidth of 45.8% (7.78–12.4GHz, 4620MHz)...
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 an analysis of four impedance matching techniques to apply in tapered microstrip patch antenna fed by microstrip-line. The techniques used are inset-feed, quarter-wave transformer, displaced-line, and hybrid-line, which is a combination of the other three techniques. The antennas were designed to an operation frequency of 5 GHz. Antenna analysis and measurement were done using...
A compact coplanar waveguide (CPW)-fed F-shaped stub printed antenna is presented. The first and second resonance modes are excited due to F-shaped stub connected to modified CPW ground plane and third resonance mode due to modified L-shaped CPW feeding. The impedance bandwidths of 190 MHz (2.06–2.25 GHz) for UMTS band, 530 MHz (4.61–5.14 GHz) for 4.9 GHz public safety WLAN, 1490 MHz (5.45–6.94 GHz)...
Bandwidth enhancement of an ultra-wide band swastika slot loaded antenna with band notch characteristic is presented. The antenna consists of an exciting rectangular patch on the front side and a partial ground plane on the backside of the substrate. A swastika shape is etched on patch, by inserting corner slots to the swastika shape, notched frequency band is improved. The simulated impedance is...
A compact strip-loaded slot antenna fed by microstrip line with double feeding strip and double blended stub is present. With the use of proposed feeding, the rectangular slot antenna achieves a very wide impedance bandwidth of 167%, which can operate in frequencies lower than 960 MHz for ground penetrating radar (GPR) applications. In addition, the two curved strips are used for changing the behavior...
The microstrip antenna (MSA) is one of the most widely used microwave antennas possessing several advantages. However, it presents a low impedance bandwidth, low gain, and tolerance problems. Due to the increasing usage of wireless communication applications, the performance improvement studies of such systems has found a growing investigation area in recent years. One new area of applying wireless...
As the majority of the radio localization applications are adopting the 5.8 GHz band, in this paper, an elliptical slotted patch antenna with a defected ground structure is proposed for wideband Applications. The −10dB S11 bandwidth is 7.8GHz (4.1 GHz to 11.9 GHz).. The effective directional radiation patterns and the large impedance bandwidth has been witnessed from simulation results. The proposed...
In this paper a stacked modified Sierpinski's gasket fractal antenna is presented to achieve dual band behavior and wide bandwidth for satellite down link and uplink application in C-band D/L 4Ghz (3.82Ghz-4.38Ghz) and U/L 6Ghz (5.92Ghz-6.19Ghz) bands respectively. It is designed with proximity feeding technique using FR4 (∊r=4.4) substrate and height of the substrate h=1.6mm. Based on self similar...
In this paper, Theory of Characteristic Mode (TCM) has been exploited to enhance the performance of MIMO antenna. Characteristic modes of Chassis has been analyzed, it has been observed that only one mode is resonating around 1GHz. To enable more than one characteristic mode to resonate around 1GHz, Two metal strips are attached along the length of the chassis with the help of shorting pins. A new...
A novel single-feed wide band planar circularly polarized (CP) slot antenna is presented. This slot antenna consists of an L-shaped feeding stub with metamaterial inspired complementary split ring resonator (MICSRR) and a wide 45° rotated square aperture. Broadband impedance and CP radiation bandwidth (BW) is achieved by using a novel artificial exciting stub with defecting CSRRs on it. By controlling...
In order to fulfil strict design requirements for antennas in real products, a new approach to handset antenna design is studied. In the beginning, the shape of the antenna element is fixed and the actual design is done by adjusting the position of the feeding pins and by using passive circuit elements. The designed single-element antenna covers LTE frequency bands 698–960 MHz, 1710–2690 MHz, and...
This paper describes a wide-band dual-polarized slotted-waveguide antenna working at V-band (57–66 GHz) based on Gap Waveguide concept. The antenna has three layers. The first one (feeding-layer 1) is practically identical to the second one (feeding-layer 2). This optimizes the design and facilitates manufacturing. The corporate-feeding networks on the two layers are rotated 90 degrees to each other...
This paper investigates a planar monopole antenna for fifth generation (5G) wireless communication networks. The proposed antenna has an ultra-wide band impedance response in millimeter wave (mmW) spectrum, 25–39 GHz covering Ka band. The antenna has unique structural layout resembling hexagonal honeycomb and has low profile (8×7 mm2) on 0.254 mm thick Rogers substrate, enabling the design for incorporation...
In this paper, we report the results of a preliminary study of the design of dual-band platform-mounted antennas. In this approach, appropriately-designed coupling elements are employed to excite a desired platform mode to obtain an operating band in the HF frequency range. Moreover, the coupling elements are also designed to act as ultra-wideband radiators within the VHF frequency band. The coupling...
Two sequentially rotated, four stage, wideband circularly polarized high gain microstrip patch array antennas at Ku-band are investigated and compared by incorporating both unequal and equal power division based feeding networks. Four stages of sequential rotation is used to create 16×16 patch array which provides wider common bandwidth between the impedance matching (S11 < −10dB), 3dB axial ratio...
This paper describes the design, fabrication and characterization of a 42 GHz compact lens antenna integrated in a backhaul terminal radome. The proposed lens concept relies on the use of hybrid design that mixes a single refractive bulk zone and dielectric structured zones. This allows overcoming usual Fresnel lens efficiency limitations occurring in compact configurations. The antenna is composed...
This paper presents a wideband pyramidal sinuous antenna, over a conducting ground plane, for use as a reflector antenna feed. Specific attention is given to comparisons with a similar structure where the sinuous shape is instead projected onto a cone. The pyramidal structure is significantly simpler to manufacture, and measured results confirms this where close agreement with simulations is observed.
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