A new broadband and dual band circular slot cut modified circular microstrip antenna is analyzed and proposed. The parametric study to analyze the effects of circular slot which realizes broader bandwidth is presented. The circular slot creates two additional resonant modes near the fundamental TM11 mode resonance frequency of the equivalent circular patch and yields bandwidth of 202 MHz (8%). ...

The proposed antenna design is a modified Eshape patch antenna truncated at the edges, yielding circular polarization. The antenna operates at multiple frequencies: 2.82 GHz, 3.9 GHz, 4.75 GHz and 6.2 GHz suitable for WLAN and WiMAX applications. The antenna is constructed using a single layer glass epoxy substrate, having dielectric constant εr = 4.3 and loss tangent tan δ =0.001. A co-axial f...

A single-feed low-profile and easy to fabricate circularly polarized microstrip patch antenna has been developed for GPS applications. For dual frequency operation, four slots are etched near edges of the patch and a crossed slot etched in the center for generating circular polarization. In order to reducing the frequency ratio of two frequency bands of the antenna, the patch is loaded by four ...

Suspended hexagonal microstrip antenna with a single coaxial feed has been proposed for circular polarization. The configuration has been realized by inserting perturbations along two opposite sides of the suspended hexagonal microstrip antenna. The broad bandwidth of 70 MHz has been obtained corresponding to VSWR < 2 and 3 dB axial ratio bandwidth of 16.2 MHz has been achieved for the suspende...

In this paper, a new design technique for enhancing bandwidth that improves the performance of a conventional microstrip patch antenna is proposed. This paper presents a novel wideband probe fed inverted slotted microstrip patch antenna. The design adopts contemporary techniques; coaxial probe feeding, inverted patch structure and slotted patch. The composite effect of integrating these techniq...

On-body channels show highly polarization selectivity with respect to the orientation of the transmit and receiving antennas, while the body coupling and scattering effects in reverse affect the antenna polarization characteristics in nearfield. In this paper, three kinds of compact linearly polarized antennas, the inverted-F antenna, the meandered inverted-F antenna, and the printed dipole ant...

This paper presents the study on a compact polarization diversity antenna array consisting of two orthogonally placed hybrid dielectric resonator antenna (DRA) elements. A prototype antenna array for IEEE802.11a WLAN application is designed and measured. Over 20 dB isolation and 18% input impedance bandwidth is achieved while symmetrical and unidirectional radiation patterns are maintained over...

A square slot antenna fed by two orthogonal feedlines is designed for dual polarized applications. The presented antenna has not only a dual operating band, but also a very wide bandwidth. The bandwidth is 91% in the first band and 40% in the second one. It can simultaneously serve most of the modern wireless communication applications that operate at 1.8, 1.9, 2.4, 5.2 and 5.8 GHz and require ...

The narrow working bandwidth of microstrip antennas limits their applications in in radar and communication systems. Staked patch antenna based on aperture coupling and asymmetry feeding technique was proposed in this paper. A cross-shape aperture imbedded in the ground plane with asymmetry feeding structure provided a relative wideband electromagnetic coupling and allowed a high isolation betw...

This study deals with a design procedure of microstrip patch antenna for wireless application. The proposed octagon shaped hybrid coupled microstrip antenna for multiband operation is pertinent in wireless application. By exciting two orthogonal modes by 90° time phase difference in hybrid coupling circular polarization is obtained. The gain is enhanced by introducing tapering at the end of hyb...