Reconfigurable antennas have attracted a lot of attention especially in future wireless communication systems. Superior features such as reconfigurable capability, low cost, multi-purpose functions and size miniaturization have given reconfigurable antennas advantage to be integrated into a wireless systems. In this chapter, two types of reconfigurable antennas are discussed. First, frequency r...

–The paper presents the good matching between simulated and measured results of dual band and broad band rectangular patch mircostrip antenna with T shaped slot (RPMATSS) for the WiMax Application. This antenna is designed on glass epoxy FR-4 substrate. The performance of this antenna is also compared with that of a simple rectangular patch antenna. The simulated results for this antenna are op...

Abstract— Miniaturized structure and multiple band performance of a patch antenna are primary requirements for modern wireless communication systems. In this paper, a novel design of monopole dual band microstrip patch antenna with circular ring has been proposed for S and C band applications. For dual bands (4.0 GHz and 4.68 GHz), proposed patch antenna shows quite satisfactory radiation perfo...

A reconfigurable yagi uda shaped microstrip antenna with switchable frequency is proposed. The proposed antenna has a simple structure, consisting of a square radiating patch and parasitic conductors of rectangular shape. This antenna is designed for multiband like WIMAX, GSM, GPS, FDMA and PCS. PIN diodes are used to switch frequencies between different bands depending on the state of the PIN ...

This paper present the design and performance of a microstrip fed circular patch antenna with defected ground plane. The overall size of antenna is 35mm × 30 mm × 1.59 mm. The proposed antenna is simulated by applying CST Microwave Studio simulator. This antenna provides broad impedance bandwidth of 2.70GHz (2.30 GHz – 5.01 GHz) with flat gain (close to 3dBi) in the desired frequency range. Thi...

A new planar monopole antenna which covers 3G, Bluetooth, WiMAX, and the UWB bands and also exhibits dual band-notched characteristic is presented. Presented antenna consist a square radiating patch with a pair of L-shaped slits, and two U-shaped slot and a ground pale with a V-shaped strip. The proposed antenna has been successfully simulated and measured. Experimental results shows that the p...

In this paper capacitive fed rectangular patch Microstrip antenna loaded with I-shape slots is developed. The model of Antenna uses the capacitive feed strip which is fed by coaxial probe using equivalent circuit approach. The proposed antenna has the impedance bandwidth of 58% in the frequency range 3.9GHz to 7.14GHz which shows wideband characteristics. Gain is almost constant in the entire b...

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...

A low profile planar inverted-F antenna (PIFA) is proposed for mobile handset applications. The proposed antenna covers DCS-1800 & PCS-1900 bands. The antenna consists of a square planar element suspended above the FR4 dielectric substrate. The ground plane is on the bottom side of the substrate. Overall size of the antenna is 22*22*5.2 mm3 and is well suited for mobile handsets due to its low ...