The possibility of using non-Foster circuit to expand the bandwidth of a monopole antenna is investigated theoretically. Beginning with an inductor-loaded monopole antenna resonating at different frequencies by changing the value of the loaded inductor, we show that a frequency-dependent inductor is needed to enhance the bandwidth of the monopole antenna. The curve for the reactance of the freq...

A high gain conformal antenna is proposed having E-shaped patch to be used in SHF frequency range. A comprehensive parametric study has been carried out to understand the effects of various dielectric substrate effects and to optimize the performance of the antenna. For various substrate materials the effect of dielectric constant, loss tangent, mass density, bulk conductivity is observed .Resu...

In this paper, a compact, planar ultrawideband (UWB) monopole microstrip antenna is proposed which offers dual band notch characteristics with enhanced rejection at frequency bands centered at 3.4GHz and 5.5GHz. To realize enhanced band notched characteristics at 3.4GHz, a pair of filters is incorporated which includes an inverted ‘L’ shaped slot and a twisted ‘J’ shaped slot in the patch eleme...

This article presents the design, simulation and testing of an Ultra Wide Band (UWB) planar monopole antenna with WLAN band-notch characteristic. The proposed antenna consists, the combination of planar monopole antenna with partial ground and a pair of AMC structures. The AMC structure used for the design is mushroom-like. Design equation of EBG parameters is also proposed for FR4 substrate us...

A compact wideband antenna with cylindrical conformal geometry is proposed . The radiating element of this antenna consists of an Eshaped patch that assumes a conformal orientation relative to the cylindrical surface in order to yield maximum bandwidth. The antenna is fed by waveguide feeding connected to the radiating patch at the longer side Radiation properties of the proposed including far-...

Regularly shaped compact microstrip antennas have a small size but their gain is insufficient for most applications. Therefore, a ring-shaped compact microstrip reflectarray with microstrip antenna feed has been proposed. Different configurations, namely, 1 × 3, 3 × 1, plus-shaped and 3 × 3 have been analyzed. The 3 × 3 configuration yields an optimum gain of 10. 8 dBi and a narrow beamwidth of...

A novel ultra-broadband printed monopole antenna with 10 dB return loss bandwidth from 2.1-21.5GHz is proposed. This printed monopole antenna is constructed using cross-slotted modified circular patch with etched ground plane. This UWB printed monopole antenna is microstrip-fed with a triangular tapered input line for broadband matching.

This paper discusses the investigation of a wearable textile monopole antenna on specific absorption rate (SAR) for bodycentric wireless communication applications at 2.45 GHz. The antenna is characterized on a realistic 8 x 8 x 8 mm resolution truncated Hugo body model in CST Microwave Studio software. The result exhibited that the simulated SAR values were reduced significantly by 83.5% as th...

In recent years, efforts have been made to replace rod-shaped monopole antennas with planar exhibiting an omnidirectional radiation pattern. this paper, we describe the design, fabrication, and testing procedures of a dual-band antenna that can used in wireless local area network (LAN) routers. The proposed consists square metal patch, ring, shorting vias on multilayer printed circuit board ind...