نتایج جستجو برای: two band antennas
تعداد نتایج: 2544716 فیلتر نتایج به سال:
In this paper, Dual Band in Ultra wide band monopole patch antennas is proposed. These newly simulated structures are proposed for fabrication. The antennas are suitable for operating frequency of 7.9GHz and 13.5 GHz in UWB it is shown that return loss of the antennas at 7.9 GHz and 13.5 GHz is better than -10 dB. The VSWR obtained is less than 1.1 the patch antenna is found to have the compact...
The increasing use of wireless communication systems, demands antennas for different systems and standards, with properties like broadband, compact, multiple resonant frequencies. The previous chapter discussed the analysis and fabrication of two single frequency EBG antennas. This chapter deals with the design and fabrication of a dual frequency EBG antenna. The bandwidth improvement of a comp...
Two planar monopole antennas with wide impedance bandwidth are designed. A full-wave method of moment (MoM) based on the electric field integral equation (EFIE) is applied to analyze the impedance bandwidth and radiation performance of the monopoles. Meanwhile, the multilevel fast multipole algorithm (MLFMA) is employed to reduce the memory requirements and computational time. Experimental resu...
The U-slot micro-strip patch antennas were originally developed for bandwidth broadening applications. This study presents a transmission line feed to modify the U-slot stacked rectangular micro-strip patch antenna for Ultra-Wide Band (UWB) communications. The modified antenna has a U-cut loaded with parallel slits and corner slots and is printed on a dielectric substrate of FR4 with relative p...
Background and Objectives: Due to the increasing use of mobile phone in recent years, the number of BTS antennas has also increased. .Proliferation of BTS antennas in cities and villages, and perpetuation of encountering with waves from one side and increasing the anxiety of many people in encountering with their waves from the other side convinced more investigations in this field. Therefore,...
In this review article, different structures of monopole antennas based on metamaterial concepts which have been developed for various wireless applications are presented. The antennas designed for wireless applications must be broad band, low profile, small size and have better performance. Monopole antennas embedded with Artificial magnetic conductors (AMC), Electromagnetic band gap structure...
Two microstrip fed ultra-wideband (UWB) antennas with different band rejection techniques are presented in this paper. The designed antennas consist of a defected ground plane with an elliptical slot and two different radiator shapes. The first design is composed of a half circular ring radiator element while the second one uses a crescent shaped radiator. The radiators are fed by a 50 Ω micros...
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