A new frequency agile BST varactor loaded stacked circular microstrip antenna is presented. The antenna is analysed using extended cavity model. One of two bands of antenna is tunable with the help of BST varactor. The upper band is useful for WiMAX and lower band for other wireless communication systems. Various antenna parameters like return loss, resonant frequency, frequency agility etc. ha...

In this paper, S-shape microstrip patch antenna is investigated for wideband operation using circuit theory concept based on modal expansion cavity model. It is found that the antenna resonates at 2.62 GHz. The bandwidth of the S-shape microstrip patch antenna 21.62 % (theoretical) and 20.49% (simulated). The theoretical results are compared with IE3D simulation as well as reported experimental...

In this research article, a dual-polarized compact bow-tie-shaped irregular fractal antenna with dual metasurface (DMS) for directional radiation applications is designed using dual-mode simple feeding mechanism. A short-circuited strip linked between the impedance transformation feed and radiating patch activates induced coupling modes, which are capacitive (C-mode) inductive (L-mode), respect...

ISSN-2277-1956/V1N2-533-537 A Design of H-shape Slot loaded Wideband Microstrip Patch Antenna Ram Singh Kushwaha, D.K.Srivastava, J.P.Saini 1-Department of Electronics and Communication Engineering, BIET Jhansi, INDIA [email protected] 2-Department of Electronics and Communication Engineering, BIET Jhansi, INDIA [email protected] 3-Madan Mohan Malviya College of...

In this paper, the authors present a new and robust conformal Finite Difference Time Domain (FDTD) algorithm for the accurate modeling of perfectly conducting objects with curved surfaces and edges. We illustrate the application of this approach by analyzing a number of representative antenna and cavity problems. These include a quarter wave monopole mounted on a perfectly conducting elliptic d...

Bandwidth and gain enhancement of microstrip patch antennas (MPAs) is proposed using reflective metasurface (RMS) as a superstrate. Two different types of the RMS, namelythe double split-ring resonator (DSR) and double closed-ring resonator (DCR) are separately investigated. The two antenna prototypes were manufactured, measured and compared. The experimental results confirm that the RMS loaded...

In this paper, a fully transparent antenna comprising of an Artificial Magnetic Conductor (AMC) backed Co-planar Waveguide (CPW) fed dual-ring monopole is presented. The and AMC structure achieve transparency due to the use AgHT-8 conductive oxide Plexiglas substrate. Measured performance shows impedance bandwidth 5.3 – 6 GHz (12.4%) in U-NII-1 U-NII-4 frequency band with peak gain 5.7 dBi whic...