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In this article a microstrip antenna is reported for wideband wireless communication application. The main radiator of this design is printed in the front side of a piece of FR4 dielectric substrate while a finite ground plane is etched on the rear side. To achieve wide operating band, the ground plane is reduced to partial one and defected by inserting slots on its upper edge. It is found that this...
This paper proposes and analyses a circularly polarized square patch antenna with an improved axial ratio bandwidth covering a frequency of 1.665GHz to 1.845GHz. The antenna attains circular polarization using the perturbations — truncated corners and well-shaped slots embedded on the patch. The results indicate that the antenna attains desirable axial ratio (below 3dB) for a wide elevation range...
This paper presents a lightweight and simple structure of slotted circularly polarized (CP) patch antenna using conductive textile. ShieldIt Super is used as a conductive textile and felt is used as a substrate of the antenna. The prototype is designed with a total dimension of 36 mm × 36 mm and spaced by a 3 mm thick felt fabric for Body-centric Wireless Communication (BCWC) operating in the 5.2...
Frequency reconfiguration is a requirement in most of the communication related activities involving multiband communication. A novel frequency reconfigurable Vivaldi antenna that can be used for cognitive radio is explored. In a Cognitive Radio system, the antenna should be capable of sensing the entire bandwidth and should be able to select a specific frequency. In this work, spectrum sensing is...
A microstrip line-fed slot antenna is presented in this paper to operate in the entire 4G/LTE band. The slot antenna has the letter ‘L’ shape, and when excited with a transmission line generates multiple modes. These modes are combined to obtain the large bandwidth for covering most of the 4G/LTE band. Several feedlines have been studied to enhance the bandwidth. The slot width is also varied to achieve...
In this article, we have proposed a novel rectangular microstrip slot antenna with frequency reconfigurable characteristics for wireless applications. With the aid of two switches the reconfigurable characteristic of antenna is achieved thus enabling it to work in multiple modes. By making these switches ON and OFF, the antenna's frequency of operation can be varied. The antenna has a single band...
A coplanar waveguide (CPW) fed circularly polarized monopole antenna is presented. The monopole antenna is placed inside a hexagonal shaped slot which is acting as a ground plane. A pair of L-shaped stubs are placed diagonally inside the slot. In order to enhance the impedance bandwidth a spiral discontinuity is created in the grounded ring, near to the edge of the L-stub. The measured result shows...
In this article, a printed planar low VSWR monopole antenna with a new modified ground plane for ultra-wideband (UWB) and 2.6 GHz LTE-band applications is presented. The dimensions of proposed antenna structure are optimized to achieve low VSWR performance. The antenna is fabricated on a low cost FR4 epoxy substrate and tested. The proposed antenna return loss is below −15 dB within bandwidth 2.5–13...
A Compact Wideband Monopole Antenna, designed for wireless applications has been investigated in this paper. The antenna consists of a Radiating Patch along with a Defected Ground Plane. The proposed antenna has been compared with a similar Radiating Patch without any Defected Ground Structure (DGS) and the results have been discussed with comparison plots. The proposed antenna covers a frequency...
In this paper a design of linearly and circularly polarised Bull's Eye antenna is presented. The proposed antenna consists of two identical rectangular slots in a shape of cross surrounded by symmetric periodic grooves drilled in the surface of metallic plate. The antenna can operate on vertical, horizontal and circular polarisation over its entire bandwidth. It resonates at 14.8 GHz and it has a...
This paper presents a T-shaped antenna at millimetre-wave (MMW) frequency ranges to offer a number of advantages including simple structure, high operating bandwidth, and high gain. Defected ground structures (DGS) have been symmetrically added in ground in order to produce multiple resonating bands, accompanied by partial ground plane to achieve continuous operating bandwidth. The antenna consists...
An extremely wideband monopole antenna combined for Bluetooth at 2.4 GHz and Ultra-Wide Band (3.1–10.6 GHz) with triband notched characteristics is presented. The frequency range from 2 to 17.5 GHz is achieved by cutting triangular portions from edges of rectangular ground plane. The radiating patch has three slots to work as triple band notch for WiMAX at 3.5 GHz, WLAN at 5.2 GHz, 5.8 GHz and X-band...
A compact microstrip line fed tapered-shaped slotted ultra-wideband(UWB) antenna is presented. The new design is composed of a rectangular slotted patch with a compact size of 21.44 × 23.53 mm2 and fed by microstrip transmission line of 50 Ω. The proposed antenna is simulated onto a less expensive FR4 substrate which has a height of 1.6 mm. There achieved a wider bandwidth of 8.51 GHz (3.49–12 GHz)...
This paper presents the design of a small and compact size dual band Microstrip line feed slot antenna and their 2×2 MIMO implementation for WLAN, Bluetooth, and WiMAX applications. The proposed slot antenna consist of a rectangular slot on the ground plane and a pair of U-shaped strips which are embedded symmetrically along the center line of the rectangular slot antenna. For increasing bandwidth...
Due to the increasing interest in millimeter wave spectrum regions in the next generation of communication systems, there is a need to analyze and design antennas appropriated for this purpose. Microstrip antenna array with a multi-layer structure is a potential candidate. The antenna should work in a wide spectrum interval and should be multiband. The proposed antenna system consists of three layers...
Large bandwidth analysis of the communication function for a single antenna system providing simultaneously radar and communication functions is studied. The system is composed of a slotted waveguide (for the communication function) feeding a horn antenna (for the radar function) so as to assign to each function different polarizations. Additionally, by switching between two slot arrays on the waveguide,...
Selection of a suitable antenna type for a particular application has significance importance in meeting the desired system objectives. This paper investigates various antennas of different types for their suitability as a basic radiating element for a Phased Array application. This comparative study takes into account the radiation characteristics, gain, feeding mechanism, polarization, bandwidth...
A planer antenna is developed for metallic framed tablet computer for various applications. The open slot dual antenna system for the 2G/ 3G/ LTE/ WWAN/ WiMAX bands is presented. The proposed antenna system can fit inside the tablet in such a manner that the display screen is above this antenna and the metallic frame of the tablet computer is below this antenna as a ground plane. The antenna composed...
In this paper, by using circular/elliptical slots with a modified circular tuning stub and a notched ground plane, an ultra-wideband antenna is proposed. The modified circular tuning stub is gear-shaped; it can create additional surface current paths in the antenna. The notches in the ground plane is introduced to increase the bandwidth and to attain the better impedance matching. The circular slot...
We present a 2 × 2 element array based on circularly polarized (CP) metasurface-based antennas fed by a sequential phase network. The single element consists of a microstrip-line-fed slot antenna coupled to a metasurface having 4 × 4 truncated corner square patches. The proposed array, with an overall size of 50 mm × 50 mm × 2.032 mm, resulted in an impedance bandwidth of 7.5 – 11.0 GHz (37.84%) for...
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