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Selection of proper substrate material is one of the major criterions in designing any antenna. The decisive parameters of a dielectric substrate are loss tangent and relative permittivity. This paper investigates the effect of loss tangent on UWB antenna performance by comparing the commercially available FR-4 substrate having dielectric constant 4.4 with loss tangent 0.02 and CMET_LD4.4 substrate...
In this paper, two antenna geometries for multiband applications are presented. The fundamental structure consists of a circular monopole with a hexagonal slot inscribed. This structure yields different operating bands which are suitable for global systems for mobile communications (GSM 1800/1900 1.71-1.88 GHz/1.85-1.99 GHz), wireless technology for personal area networks (Bluetooth 2.4-2.485 GHz)...
This paper presents a CPW-fed dual band antenna for improved UWB response. A slotted circular monopole is used to attain dual band operation suitable for GSM 1800 and UWB applications. A fractal pattern is introduced in the design to improve matching in the UWB range. The antenna has an overall size of 34 × 51mm2 and operates in the 1.5–2 GHz and 3.4–11 GHz frequency bands (S11≤−10dB). The measured...
In this paper, a UWB antenna with added lower band is presented. The proposed antenna is planar and its low profile makes it suitable for wireless applications. The design achieves good input impedance match from 1.8 - 11GHz making it suitable for Global System for Mobile communication (GSM 1800/1900: 1.71- 1.88GHz /1.85-1.99GHz), Universal Mobile Telecommunication System (UMTS: 1.92 - 2.17GHz), Long...
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