Printed Newton's egg curved monopole antenna for ultrawideband applications

Abstract

The edge curve of a planar antenna significantly influences its radiation properties. In this study, a novel egg curve‐based design of printed monopole antenna of size 40 × 40 mm2 is proposed for ultrawideband (UWB) applications. The egg shape of the proposed antennas is obtained by Newton's diverging parabolas curve referred in this study as Newton's egg curve. The design equations of the proposed antenna are developed. The variation in impedance bandwidth (BW) with various parametric variations of design curve is studied. The proposed Newton's egg curved monopole antenna (NECMA) is designed, fabricated and measured to validate the theoretical design. Good agreement between the simulated results and the measured ones is observed. An empirical formula is also proposed to approximately determine the frequency corresponding to the lower edge of −10 dB operating BW. The results show that the proposed NECMA can obtain the measured BW of 116.55% (2.9–11.0 GHz) along with stable gain of about 2.2–2.9 dBi. The proposed antenna exhibits almost omnidirectional radiation patterns with low cross polarisation in all directions and consistent group delay over the entire UWB bandwidth (3.1–10.6 GHz).

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“…The design, essentially being a patch antenna, is furnished with a partial ground plane that covers only one‐third of the entire substrate and is defected with a strategically positioned narrow rectangular slot. Doing so allows for the attainment of the required bandwidth characteristics in a significantly reduced footprint when compared to the conventional monopole antennas . Furthermore, the design makes use of a stepped‐impedance feeding structure (instead of the standard 50 Ω line) to achieve a good impedance match over the desired band of operation.…”

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“…Evolution algorithms were introduced next; they were used to ensure the design process is more automatic and intelligent [8][9][10][11][12][13]. Instead of the evolution algorithms, which require multiple iterations, another attempt is to build various bandwidths using a single-design process [14][15][16].…”

A Low-Profile Reflector-Enhanced Drop-Shaped Printed Antenna for Wide-Band Wireless Communications

“…Wide-band antennas, having low profile and reduced manufacturing costs, are finding widespread interest in the industrial and the scientific community [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. This interest is dictated by the numerous applications such as those concerning the wireless communications [1][2][3][4][5][6][7][8][9][10][11][12][13][14], the automotive transportation [19][20][21], the remote screening of biological activities [22][23][24], as well as the analysis of the ground subsurface [25,26], and through-the-wall radar imaging.…”

“…This interest is dictated by the numerous applications such as those concerning the wireless communications [1][2][3][4][5][6][7][8][9][10][11][12][13][14], the automotive transportation [19][20][21], the remote screening of biological activities [22][23][24], as well as the analysis of the ground subsurface [25,26], and through-the-wall radar imaging. Moreover, they may be used to realize UWB systems for short-range and indoor wireless communications characterized by low transmission-power consumption and high immunity to multipath interferences [27].…”