In this paper we present the surface wave of microstrip antenna reduce by using parasitic array at the patch ,it is a wide band antenna and frequency range of this wide band antenna lie from 1.168GHz-3.854GHz.The proposed antenna is simulated by using IE3D simulated software. This antenna can be used in WiMax,Bluetooth and Wireless communication. KeywordsMicrostrip antenna; impedance matching ;...

A novel compact-sized ultra-wideband (UWB) bandpass filter (BPF) is proposed in this paper. The proposed BPF is highly selective and is able to eliminate WLAN signals from 5.15-5.35 GHz, and downlink of X-band satellite communication signals from 7.25-7.75 GHz. Generally, a multiple-mode resonator (MMR), comprised of a U-shaped line, with two high impedance stubs connected to it, and one steppe...

Analysis and Design of Microstrip Patch antenna for a digital communication system For Narrow Band (DCS)/2.4-GHz and 5.5 GHz WLAN-Band Triple Band frequencies application is presented. The two resonant modes of the proposed antenna are associated with various arms of the monopoles, in which a rectangular resonator contributes for the 5.5 GHz WLAN resonant frequency and two various arms are resp...

A simple and compact microstrip line -fed ultrawideband planar monopole antenna with single band-notch characteristics is presented. Wide impedance bandwidth is achieved by inserting two rectangular slots on both sides of the microstrip feed line on the ground plane. Band notching is achieved by embedding a half wavelength C shaped slot on the radiator. The antenna is investigated numerically a...

To qualify the condition of a multi standard and a multi band transceiver, a quadrature voltage controlled oscillator (VCO), which has a wide and proper tuning range, is necessary, while providing high phase noise performance and consuming low current. In this paper, a dual band quadrature VCO in 0.18 μm CMOS process is proposed. To attain the dual band operation, a reconfigureurable LC tank is...