The transfer of spin angular momentum to a nanomagnet from a spin polarized current provides an efficient means of controlling the magnetization direction in nanomagnets. A unique consequence of this spin torque is that the spontaneous oscillations of the magnetization can be induced by applying a combination of a dc bias current and a magnetic field. Here we experimentally demonstrate a differ...

Abstract—This paper presents a novel fractal antenna structure proposed for UWB (Ultra – Wideband) applications. The frequency band 3.1-10.6GHz released by FCC (Federal Communication Commission) as the commercial operation of UWB has been chosen as frequency range for this antenna based on coplanar waveguide (CPW) feed and circular shapes fulfilled according to fractal geometry. The proposed an...

This paper introduces a novel compact wideband CPWfed slot antenna comprising of an E-shaped patch that is excited with a trident shaped feed-line structure. The antenna design exhibits a very wide operating bandwidth of over 168% with S11 < −10 dB in the frequency range 1.6 to 18.9GHz. The antenna’s radiation characteristics are stable across this wide bandwidth. The proposed antenna exhibits ...

A novel compact asymmetrical grounded coplanar waveguide-fed antenna for dual-band operation is presented. The modified asymmetric ground and slit on the radiating element provides dual band covering 2.4 and 5.2 GHz WLAN operation. A prototype of proposed antenna has been fabricated and tested. The antenna offers omnidirectional radiation pattern at 2.4 GHz and directional radiation pattern at ...

A tapered coplanar waveguide (CPW) transition is proposed in order to facilitate the connection between a slot antenna and coaxial connector. The broadband bow-tie slot antenna is considered as an example in this design. The tapered transition is utilized to optimize the connection of two 50 CPW lines with different widths. A narrow CPW line is connected to the slot-antenna feed point and the w...

A novel CPW-fed antenna capable of triple-band operation for WLAN/WiMAX applications is presented and investigated in this paper. The proposed antenna simply consists of three elements viz. folded open stub, L-shaped open stub, and Y-shaped resonator. By using the three elements, triple-band antenna operating at 2.5/3.5/5.5 GHz can be achieved. The antenna impedance bandwidths for |S11| ≤ −10 d...

This paper presents a microstrip antenna using CPW-fed heptagonal shaped antenna embedded with triangular shaped slots for WLAN/WIMAX applications. The proposed antenna provides an impedance bandwidth of 3.08 GHz. The antenna exhibits dual frequency bands 3.4 GHz to 6.48 GHz, covering WLAN and WiMAX bands. The parametric study is performed to understand the characteristics of the proposed anten...