Abstract
Ultrawideband (UWB) antennas are widely used as core devices in high-speed wireless communication. A novel compact UWB monopole antenna with an additional narrow band for Wi-Fi applications comprising a metamaterial (MTM) is proposed in this paper. The antenna has a compact size of 27 × 33 mm2 and consists of a V-shaped slot with two rectangular slots in the radiation patch. The inductance and capacitance develop due to the V-shaped slot in the radiation patch. The proposed antenna has −10 dB bandwidths of 3.2 GHz to 14 GHz for UWB and 2.38 GHz to 2.57 GHz for narrowband, corresponding to 144% and 7.66% fractional bandwidths, respectively. The measured gain and efficiency meet the desired values for UWB and Wi-Fi applications. To verify the performance of the antenna, the proposed antenna is fabricated and tested. The simulated and measured results agree well at UWB frequencies and Wi-Fi frequencies, and the antenna can be used as a smart device for portable IoT applications.
Highlights
Ultrawideband technology has promising prospects in short-range communication systems due to its attractive characteristics such as broad bandwidth, high data-rates, low power spectrum levels, and good radiation performance [1,2]
The UWB frequency range is defined as 3.1–10.6 GHz by the Federal Communications Commission (FCC) [3,4]
UWB antennas play a role in many applications, such as surveillance systems, medical applications, wireless sensor networks, and the Internet of Things (IoT) [5,6,7,8]
Summary
Ultrawideband technology has promising prospects in short-range communication systems due to its attractive characteristics such as broad bandwidth, high data-rates, low power spectrum levels, and good radiation performance [1,2]. In [15,16,17,18,19], the UWB technique was implemented with a defective ground plane and different shapes of slots or stubs Some of these antennas were miniaturized in size, they did not integrate the UWB spectrum with other useful frequency bands for short-range communications. In [28], an antenna was presented with a bandwidth from 4.5 GHz to 11 GHz which was an incomplete operational range for UWB application Despite these many designs, we still need low-profile and compact UWB antennas for integration with other frequency bands using simple etching techniques. The proposed antenna design, characteristics, and experimental results are discussed
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