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An ultra-wideband (UWB) bandpass filter based on composite right/left handed (CRLH) transmission line is presented in this paper. The bandwidth of the filter can be widen by the high-low-high step-impedance section and two novel interdigital capacitors of the CRLH transmission line. The common short circuited inductive stub of two capacitors exhibits stopband rejection level greater than 30 dB at...
In this paper we describe a novel approach to reduce the mutual coupling in microstrip antenna arrays by using metamaterial absorber (MA). The MA is constructed with split-ring resonators to suppress the surface current propagation between two microstrip antenna elements at the resonant frequency. By inserting the MA, it has been achieved an improvement in decoupling by 10.8 dB with a center-to-center...
A uniplanar compact metamaterial-inspired triple-band dipole antenna is designed and proposed for wireless local area network (WLAN) and Worldwide Interoperability for Microwave Access (WiMAX) applications. By introducing two pairs of complementary capacitively loaded loop (CCLL) slots into a uniplanar bow-tie antenna, two notched bands can be generated to form a triple-band operation. The antenna...
A coplanar bow-tie antenna with triple-band operation for WLAN and WiMAX application is presented. The dual band-notched characteristic is realized by etching a U-shaped slot and a capacitively-loaded-loop (CLL)-shaped slot in the radiation patch. A triple band antenna, covering 2.24–2.70, 3.24–4.24, 4.84–6.00GHz, can be achieved through adjusting the positions and geometric parameters of the slots...
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