A Compact Inductively Loaded Monopole Antenna for Future Uwb Applications

Abstract

Abstract-A novel inductively loaded monopole for future ultra-wideband (UWB) applications is presented. The antenna is compact and of small size (16 mm × 20 mm × 0.8 mm), and offer a very simple geometry suitable for low cost fabrication and straight forward printed circuit board integration. More specifically, the impedance matching of the classic printed inductively loaded monopole is improved by employment of the tapered microstrip feed line between K-connector and the printed monopole. By using this technique, impedance bandwidth (S 11 < −10 dB) from 3.03 GHz to over 40 GHz is obtained. Measured and simulated return loss curves are provided along with radiation patterns and gains, as a function of frequency. Compared to the recently reported UWB antennas, the presented antenna have smallest size, widest bandwidth, and simple configuration to realize the application in UWB communication systems. Furthermore, symmetric radiation patterns and satisfactory gains make the presented antenna a suitable candidate for practical UWB applications.

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Development of inductive‐loaded ultra‐wideband monopole antennas from stepped‐impedance resonators

“…Monopole antennas with inductive loads are reported to have increased resonance bandwidths [5–7]. Recently, it has also been validated that the use of lumped inductors combine the multiple bands of resonance of the printed stepped‐impedance monopoles into a single resonance band encompassing the entire UWB range of frequencies [8, 9].…”

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“…Literature [4] improved the design of an antipodal Vivaldi antenna which can cover a wideband from 3 GHz to 15.1 GHz, but it still has a size of 41×48 mm 2 . Some special shape monopole antennas used an appropriate feeding way can also obtain a large bandwidth, such as circular monopole antennas [6,7], hexagonal monopole antennas [8], etc. Fractal theory is a novel method for antenna design.…”