An ultra-wideband (UWB) U type monopole antenna fed by a coplanar waveguide (CPW) is proposed. It has low profile and very compact size (14.48 mm × 28.74 mm × 0.8 mm). It provides an wide impedance bandwidth ranging from 3.08 GHz to about 12.75 GHz adjustable by variation of its parameters, such as the relative permittivity and thickness of the substrate, width, and feed and ground plane dimensions. Parametric study is presented. Details of the proposed ultra-wideband design are described. Simulation results are presented and discussed in this paper.

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A planar u type monopole antenna for uwb applications

In this paper, a new compact circular monopole ultra- wideband antenna with multiple narrow bands notched is proposed, which is implemented by using the existing techniques, such as loading a L-type band-stop filter, inserting a split ring resonator (SRR), and the method we proposed that connecting L branches on the radiation disk Four sharp notches at 24GHz, 35 GHz, 55 GHz, and 76 GHz are achieved separately The measured VSWR shows a good agreement with the simulation results The radiation patterns are obtained from Ansoft HFSS simulations and verified by CST Microwave Studio The results prove that this kind of antenna can be applied in the UWB communication systems to avoid interference with other wireless systems, such as the 24GHz WLAN, 35 GHz WiMax, and 58 GHz WLAN etc The parameters determining the antenna's band notched characteristic are discussed

https://www.jpier.org/PIER/pier84/19.08072801.pdf

A Compact Ultra-Wideband Microstrip Antenna with Multiple Notches

The technology of metallized foam offers a new approach to design wire-like, flat, and 3D antennas. Only the necessary metal skin depth (some microns in UHF band) is deposited over arbitrary shaped structures. Thanks to this technology, new antenna designs have been possible offering low weight, possible shaping, and innovative Corresponding author: J. Anguera (jaume.anguera@fractus.com). † Also with Electronics and Telecommunications Department, Universitat Ramon Llull, Barcelona, Spain. ‡ Also with Signal Theory and Communications Dept., Universitat Politecnica de Catalunya, Barcelona, Spain.

/pdf/metallized-foams-for-antenna-design-application-to-fractal-2lms2f1wr8.pdf

Metallized Foams for Antenna Design: Application to Fractal-Shaped Sierpinski-Carpet Monopole

This paper presents a new ultra wideband bandpass filter which is implemented using defected microstrip structures (DMS). This wideband bandpass filter consists of a cascade connection of new bandpass DMS resonators. Transmission line model for proposed resonator is introduced, and detailed analysis using method of lines is investigated. Properly selected impedances of transmission lines achieve broadband filter. The theoretically predicted performance is in good agreement with experimental results.

A New Microstrip UWB Bandpass Filter Using Defected Microstrip Structures

The design of an octagonal-shaped microstrip-fed planar monopole antenna for ultrawideband (UWB) operation is studied. Two inverted T-shaped slits are embedded on the ground plane to allow band rejection characteristic from 5 to 6GHz (for VSWR < 2). To enable switching capability for this band rejection function, a PIN diode is connected to each slit via a specifled chip inductor that will be further investigated. Several prototypes were constructed and the measured results show that the proposed antenna can provide an operating bandwidth from 3.07 to 10.7GHz, except for the rejected band. Simulation analyses are also carried out to validate the experimental results.

/pdf/planar-uwb-antenna-with-5-ghz-band-rejection-switching-29zv13zma8.pdf

Planar UWB Antenna with 5 GHz Band Rejection Switching Function at Ground Plane

A new circular ultra-wideband fractal monopole antenna based on descartes circle theorem (DCT) with elliptical iterations is presented. The proposed fractal design is optimized for return loss below −15 dB. The basic structure is slightly modified to ensure an overall smooth current distribution limited by the junction point nature of the fractal geometries. The measured return loss of the proposed design is below −15 dB within its impedance bandwidth along with omni-directional radiation pattern. Moreover due to the fractal shape, the proposed design has less weight and wind loading effect.

/pdf/circular-fractal-monopole-antenna-for-low-vswr-uwb-490gi4nw16.pdf

and Sailing He

Papers

Circular fractal monopole antenna for low vswr uwb applications