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Electronics
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Wideband RF Front-End Components for Ultra-Wideband (UWB) Applications
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Wideband RF Front-End Components for Ultra-Wideband (UWB) Applications

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Microwave and Wireless Communications".

Deadline for manuscript submissions: closed (20 December 2021) | Viewed by 9193

Special Issue Editor

Prof. Dr. Haruichi Kanaya

E-Mail Website
Guest Editor
Department of Electronics, Kyushu University, Fukuoka 819-0395, Japan
Interests: radio-frequency integrated circuits (RFIC); microwave communication device; UWB and multi-band antennas
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, wireless communication technology has rapidly developed, and wireless communication services have diversified and complicated. Ultra-wideband (UWB) systems are attracting attention as ultra-high-speed wireless communication technologies. A major feature of UWB communication is that it uses a very wide frequency band compared to conventional wireless systems. The frequency band of UWB communication is available in the microwave band of 3.1 to 10.6 GHz, and in the quasi-millimeter wave band of 22 to 29 GHz. The UWB system is capable of high accuracy position measurement with an error of a few centimeters as well as large volume data transfer. The system using the impulse radio-type UWB (IR UWB) is expected to be applied to material management and safety management in factories, for example.

Application in healthcare is expected for the wireless body area network (WBAN) to the surface of the human body. If a broadband antenna can be used to cover the band of wireless LAN, Bluetooth, ZigBee, etc., and even 5G communication with a single antenna, wireless devices can be significantly reduced in size.

The major topics of interest for this Special Issue include, but are not limited to:

  • Ultra-wideband antennas
  • Broadband antennas
  • Multiband antennas
  • Ultra-wideband communication
  • Ultra-wideband radar
  • Radar applications
  • UWB system

Prof. Dr. Haruichi Kanaya
Guest Editor

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • Ultra-wideband antennas Broadband antennas
  • Multiband antennas
  • Ultra-wideband communication
  • Ultra-wideband radar
  • Radar applications
  • UWB system

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Published Papers (3 papers)

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14 pages, 4631 KiB  
Article
Thin Circularly Polarized Slot Array Antenna for High-Band UWB Applications
by Ryo Takigawa, Shunsuke Kai and Haruichi Kanaya
Electronics 2022, 11(7), 1070; https://doi.org/10.3390/electronics11071070 - 29 Mar 2022
Viewed by 2701
Abstract
This paper presents a thin 2 × 2 circularly polarized slot array antenna that operates in the high-band ultra-wideband (UWB) system. The proposed antenna is composed of three parts: a top metal part that consists of an L-shaped slot structure, a dielectric substrate, [...] Read more.
This paper presents a thin 2 × 2 circularly polarized slot array antenna that operates in the high-band ultra-wideband (UWB) system. The proposed antenna is composed of three parts: a top metal part that consists of an L-shaped slot structure, a dielectric substrate, and a bottom floating metal layer. The design model and characteristics of the antenna element and array antenna are investigated through simulation and measurement. Experimental results show that the maximum gain of the prototype array antenna is 6.94 dBi at 9.02 GHz. The antenna size is 29.2 mm × 31.7 mm, and its thickness is 1.636 mm. By using a slot antenna structure, a thin circularly polarized antenna (thickness: 1.636 mm) with high gain was demonstrated. The antenna characteristics qualify the antenna to be used in high-band UWB applications. Full article
(This article belongs to the Special Issue Wideband RF Front-End Components for Ultra-Wideband (UWB) Applications)
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15 pages, 2687 KiB  
Article
Half-Elliptical Resonator Lowpass Filter with a Wide Stopband for Low Band 5G Communication Systems
by Rasoul Azadi, Saeed Roshani, Arez Nosratpour, Ali Lalbakhsh and Mohammad Hazhir Mozaffari
Electronics 2021, 10(23), 2916; https://doi.org/10.3390/electronics10232916 - 25 Nov 2021
Cited by 6 | Viewed by 2037
Abstract
In this paper, a lowpass filter is designed using half elliptical resonators with a wide stopband. New formulas are presented to achieve a circuit model for the half elliptical resonators used in this work. Additionally, the transfer function and transmission zero equations are [...] Read more.
In this paper, a lowpass filter is designed using half elliptical resonators with a wide stopband. New formulas are presented to achieve a circuit model for the half elliptical resonators used in this work. Additionally, the transfer function and transmission zero equations are used to adjust the frequency of the transmission zeros of the filter. The cut-off frequency of the lowpass filter is 1.26 GHz with a sufficiently large stopband, extending from 1.48 GHz to 20 GHz. The proposed filter’s figure of merit is 62,520, demonstrating its outperformance compared to the state of the art. The filter is implemented on a RT-5880 substrate with a constant dielectric of 2.2, thickness of 31 mil and loss tangent of 0.0009. The LPF was fabricated and tested, showing good agreement between the simulated and measured results. Full article
(This article belongs to the Special Issue Wideband RF Front-End Components for Ultra-Wideband (UWB) Applications)
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9 pages, 2382 KiB  
Article
Compact Dual-Band Tapered Open-Ended Slot-Loop Antenna For Energy Harvesting Systems
by Mohamed Mansour, Kamel Sultan and Haruichi Kanaya
Electronics 2020, 9(9), 1394; https://doi.org/10.3390/electronics9091394 - 28 Aug 2020
Cited by 7 | Viewed by 3277
Abstract
In this study, a compact dual-band combined loop-slot planar antenna is proposed. (1) Background: multi-function antennas are desired for wireless communication to cover the desired frequency spectrum. (2) Methods: the proposed antenna consists of a semi-rectangular open-ended loop (OEL) operating at the lower [...] Read more.
In this study, a compact dual-band combined loop-slot planar antenna is proposed. (1) Background: multi-function antennas are desired for wireless communication to cover the desired frequency spectrum. (2) Methods: the proposed antenna consists of a semi-rectangular open-ended loop (OEL) operating at the lower frequency band 920 MHz, an open-ended slot (OES) transmission line that provides resonance at the higher band 2.4 GHz, and a feeding port using the asymmetric coplanar strip (ACS) line. The ACS is used to excite the antenna to achieve dual-band performance. The overall dimensions of the fabricated prototype are 32.5 × 53.5 mm2 (0.1λo×0.16λo), where λo represents the free-space wavelength at the lower frequency. (3) Results: from the calculations, the antenna shows two impedance bandwidths (estimated at −10dB) of 30 MHz (920–950 MHz) and 300 MHz (2.2–2.5 GHz) to cover the ISM band (920 MHz) and 2.45 GHz WiFi bands, respectively. Indeed, the antenna has stable radiation patterns and achieves peak measured realized gain of 1.8 dBi in the lower band and 4.2 dBi in the higher band. (4) Conclusion: the antenna shows the merits of low profile structure, single-layer, and low-cost fabrication. The proposed antenna not only achieves incremental increase in radiation efficiency, but also provides a lightweight, and small footprint. Full article
(This article belongs to the Special Issue Wideband RF Front-End Components for Ultra-Wideband (UWB) Applications)
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