A new design of coplanar waveguide (CPW)-fed antenna with circular polarization (CP) and excellent impedance matching is presented. In this design a pair of circular-shaped slits is applied to opposite corners of the slot for enhancing the impedance matching and realizes bandwidth of 134.43% across 2.98-15.20 GHz for VSWR≤2. Furthermore this structure exhibits axial ration bandwidth (ARBW) of 3...

The design of array antenna is vital study for today’s Wireless communication system to achieve higher gain, highly directional beam and also to counteract the effect of fading while signal propagates through various corrupted environments. In this study, the design and analysis of a (2x2) microstrip patch antenna array is introduced. It is designed to function in the 5.25 GHz which corresponds...

This paper presents a single-patch broadband microstrip Sshaped patch antenna. Microstrip S-shaped patch antenna, fed by a coaxial feeding. The antenna is designed by inserting two slots into rotated square patch then it look like english letter S. Because of the slots and thick substrate, bandwidth of antenna is increased. The proposed antenna is operating at centre frequency of 4.3GHz (i.e ne...

This paper demonstrates, the effect of dielectric superstrates on the performance of coaxial probe fed circular patch microstrip antenna with and without dielectric superstrates. The antenna can be designed at 2.4 GHz(ISM band) frequency and fabricated on Arlon diclad substrate, whose dielectric constant ( is 2.2. The theoretical formulation has been studied using cavity model analysis. In this...

In this research paper, a slotted coaxial line fed cross dipole excitation structure for short backfire antenna is proposed and developed to achieve reconfigurable circular polarization. The cross dipole, which is fed by the slotted coaxial line, consists of two orthogonal dipoles. The dipoles are mounted on the outer conductor of the coaxial line. A unique technique is developed to generate re...

This study presents a new design of patch antenna with Human face shaped slot on the patch. This antenna has dual operating bands and suitable for wireless and C-band application. With a simple design configuration and the human face slot form on patch, the proposed antenna can be used in multiband wireless operations, covering the mobile IMT (3400-3600 MHz), C-band (3400-4200 MHz) and WiMAX (2...

Abstract—In this paper, an ultra high frequency (UHF) low-profile antenna is proposed; it is based on the discone antenna but with addition of a back cavity, a short-circuiting structure and a two-plate top structure in order to achieve both low-profile and wideband. It is simulated and prototyped. The test results show that the antenna has an omni-directional radiation pattern in the horizonta...