This study presents a theoretical design study of a novel three-dimensional micromachined hemispherical shell antenna for ultra-wideband millimetre-wave imaging applications. The antenna is composed of a hemispherical metallic shell which is suspended on top of a high-resistivity silicon substrate using a thin silicon stem. The antenna exhibits two different operational modes and an exceptional...

In this paper, a compact ultra-wideband patch antenna with dual-band rejection is proposed. The proposed antenna filters 3.3-3.8 GHz WiMAX and 5.15-5.85 GHz WLAN by respectively rejecting these bands through a C-shaped slit and a λg/4 resonator. The λg/4 resonator is positioned as a pair, centered around the microstrip line, and a C-type slit is inserted into an elliptical patch. The impedance ...

A CPW-fed ultra-wideband antenna was designed. The antenna was etched on a single-layer copper-cladding substrate, of which the material was FR4 with relative permittivity of 4.4, and the magnitude was 40.0 mm × 50.0 mm × 1.6 mm. The parameters of the antenna are simulated and optimized with HFSS. This paper proposes a new trapezoidal CPW-fed UWB antenna that the bandwidth (return loss ≤ −10 dB...

The intent of this paper is to compare two designs of RFID antenna which is used for Ultra High frequency (UHF) and Ultra wideband (UWB) applications. Here the comparison of Hybrid design and XETS design is done. In hybrid design the antenna simultaneously operate on both the bands viz.UHF as well as UWB. In XETS design antenna operates only for UWB. Hybrid antenna is planar antenna. There is a...

A compact size low profile microstrip-fed crossed monopole antenna for ultra wideband communication is presented. The impedance bandwidth of a microstrip crossed monopole antenna has increased with a suitable dimension of ground plane and rectangular patch. The aim of this paper is to improved bandwidth and return loss of a Crossed Monopole Microstrip patch antenna and study the effect of anten...

All Rights Reserved © 2016 IJARECE 2335 Abstract— In this paper, an Ultra Wideband antenna for UWB applications and a coplanar Waveguide Feed is presented. The size of the antenna is 25 mm x 25 mm x 1.6 mm 3 and it is prototyped on FR-4 epoxy substrate material which has a dielectric constant of 4.4 at a frequency of 3.03 GHz. The proposed antenna provides a bandwidth of 11.36 GHz from 10.44 GH...

In this paper a low profile, small size polygon slot CPW fed antenna for broadband application is presented. The proposed antenna comprises of simple polygon radiator and rectangular ground plane. It resonates at 4.9 and 8.4 GHz frequency where return loss is well below to -10 dB. The proposed antenna is designed with FR4 epoxy substrate having dielectric constant of 4.4 and loss tangent of 0.0...

─ A simple and compact microstrip-fed ultra wideband (UWB) slot antenna with dual band-notch characteristic for UWB applications has been presented. In order to increase the impedance bandwidth of the square slot antenna, we insert a T-shaped slot in the ground plane that with this structure UWB frequency range can be achieved. Additionally, by using a pair of Lshaped slits at the square radiat...

Two new antenna array designs with advanced beam steering capabilities are described. The first is based on an integrated design using Ferroelectric and Continuous Transverse Stub (CTS) technologies, while the other is based on a hybrid smart antenna approach that combines the desired features from both the adaptive and switched beam approaches. The complementary features of these two analog an...

A newly designed printed slot antenna is presented that incorporates variable two band-notched functions for ultra-wideband (UWB) applications. The two band notches of this coplanar waveguide (CPW) fed antenna are achieved by an M-shaped slot (MSS) embedded in the radiating element and a C-shaped strip (CSS) close to ground plane, therefore two very narrow rejected properties in the wireless lo...