Miniaturized broadband Quasi-Yagi antenna for wireless communication and recognition
01 Nov 2017-pp 550-553
TL;DR: A miniaturized broadband Quasi-Yagi antenna which adopt new compact layout and modified bowtie driven dipole and ground patch which can be used for wireless communications and recognitions like WLAN, RFID, WiMAX and LTE is presented.
Abstract: This paper presents a miniaturized broadband Quasi-Yagi antenna which adopt new compact layout and modified bowtie driven dipole. In the proposed antenna, the micro strip feed and λ/4 impedance transformer are placed horizontally to reduce the vertical size. Meanwhile, in order to reduce the horizontal size, the vertical metallic strips are loaded to the end of bowtie driven dipole and ground patch. Compared to the conventional Quasi-Yagi antenna, the overall size of the proposed antennas are reduced about approximately 50%. The measured results show that the impedance bandwidth (reflection coefficient< −10dB) of proposed antenna is 1.16GHz (42.6%) for 2.14–3.3GHz and it has a wide bandwidth about 2.23–3.25GHz with reflection coefficient<-15dB. Moreover, the realized gain is around 4dBi in the operating bandwidth. This antenna can be used for wireless communications and recognitions like WLAN, RFID, WiMAX and LTE.
Citations
More filters
16 citations
TL;DR: A novel concept on the design of a broadband printed Yagi antenna for S-band wireless communication applications is presented and its characteristics, such as reflection coefficient, radiation pattern, and gain, are compared with simulation results.
Abstract: In this paper, a novel concept on the design of a broadband printed Yagi antenna for S-band wireless communication applications is presented. The proposed antenna exhibits a wide bandwidth (more than 48% fractional bandwidth) operating in the frequency range 2.6 GHz–4.3 GHz. This is achieved by employing an elliptically shaped coupled-directive element, which is wider compared with other elements. Compared with the conventional printed Yagi design, the tightly coupled directive element is placed very close (0.019λ to 0.0299λ) to the microstrip-fed dipole arms. The gain performance is enhanced by placing four additional elliptically shaped directive elements towards the electromagnetic field’s direction of propagation. The overall size of the proposed antenna is 60 mm × 140 mm × 1.6 mm. The proposed antenna is fabricated and its characteristics, such as reflection coefficient, radiation pattern, and gain, are compared with simulation results. Excellent agreement between measured and simulation results is observed.
4 citations
Cites methods from "Miniaturized broadband Quasi-Yagi a..."
...A broadband Yagi antenna comprising modified bowtie driven dipole is presented in [28]....
[...]
References
More filters
TL;DR: In this article, a broadband planar antenna based on the classic Yagi-Uda dipole antenna is presented, and its usefulness as an array antenna is explored, achieving a measured 48% frequency bandwidth for voltage standing-wave ratio <2, better than a 12dB front-to-back ratio, smaller than -15 dB cross polarization, and 3-5-dBi absolute gain.
Abstract: In this paper, a novel broadband planar antenna based on the classic Yagi-Uda dipole antenna is presented, and its usefulness as an array antenna is explored. This "quasi-Yagi" antenna is realized on a high dielectric-constant substrate, and is completely compatible with microstrip circuitry and solid-state devices. This antenna achieves a measured 48% frequency bandwidth for voltage standing-wave ratio <2, better than a 12-dB front-to-back ratio, smaller than -15 dB cross polarization, and 3-5-dBi absolute gain. Mutual coupling of the antenna in an array environment is investigated. Finally, three simple arrays are presented, demonstrating the usefulness of the antenna as an array element. This novel antenna should find wide application in wireless communication systems, power combining, phased arrays, and active arrays, as well as millimeter-wave imaging arrays.
378 citations
"Miniaturized broadband Quasi-Yagi a..." refers background in this paper
...6 0[9] and its size is bigger somehow in practice application....
[...]
01 Jun 1928
TL;DR: In this paper, the effect of variation of plate voltage, magnetic field strength and other factors on the high-frequency output of a magnetron tube and its external connections is described.
Abstract: Part I of this paper is devoted to a description of various experiments performed at wavelengths below 200 cm. Curves are given to show the effect of the earth and various types of inductively excited antennas called "wave directors." Part I is concluded with a discussion of beam and horizontally polarized radiation. Part II is devoted chiefly to the magnetron tubes used for the production of very short wavelengths (as low as 12 cm.) and the circuit arrangements employed. It is shown that the geometry of the tube and its external connections are of great importance. The effect of variation of plate voltage, magnetic field strength and other factors on the high-frequency output, is described.
334 citations
"Miniaturized broadband Quasi-Yagi a..." refers background in this paper
...Uda, and first published in an English language journal in 1928[1]....
[...]
TL;DR: In this article, a Yagi-like printed dipole array antenna with broadband characteristics is presented, fed by a microstrip-to-coplanar strip transition, and uses the truncated microstrip ground plane as its reflecting element.
Abstract: A compact and uniplanar antenna with broadband characteristics is presented. The novel Yagi-like printed dipole array antenna is fed by a microstrip-to-coplanar strip transition, and uses the truncated microstrip ground plane as its reflecting element. An X-band prototype measures a bandwidth of 17%. With 6.5 dB gain, 18 dB front-to-back ratio, and lower than -15 dB cross-polarisation level at 10 GHz.
306 citations
"Miniaturized broadband Quasi-Yagi a..." refers methods in this paper
...It has the similar operation principle of Yagi-Uda antenna and named QuasiYagi antenna [3]....
[...]
TL;DR: In this paper, a planar printed quasi-Yagi antenna is proposed for wideband planar communications. But the proposed antenna is not suitable for wide-band applications due to its drawback of narrow bandwidth.
Abstract: Although conventional Yagi antenna has the advantage of unidirectional radiation patterns, it is not suitable for wideband applications due to its drawback of narrow bandwidth. In this communication, a compact wideband planar printed quasi-Yagi antenna is presented. The proposed quasi-Yagi antenna consists of a microstrip line to slotline transition structure, a driver dipole, and a parasitic strip element. The driver dipole is connected to the slotline through a coplanar stripline (CPS). The proposed antenna uses a stepped connection structure between the CPS and the slotline to improve the impedance matching. Two apertures are symmetrically etched in the ground plane to improve the unidirectional radiation characteristics. Simulation and experimental results show that the unidirectional radiation patterns of the proposed antenna are good. A 92.2% measured bandwidth with ${\rm S} _{11} from 3.8 to 10.3 GHz is achieved. A moderate gain, which is better than 4 dBi, is also obtained.
61 citations
"Miniaturized broadband Quasi-Yagi a..." refers background or methods in this paper
...A stepped connection structure has been used in the QuasiYagi antenna to extend the bandwidth[8], where it has a wide bandwidth with miniaturization, and its the realized gain bandwidth is not enough wide....
[...]
...How to design a novel quasi-Yagi antennas with those properties have became a research focus[6]-[8]....
[...]
TL;DR: In this article, a coplanar waveguide-fed quasi-Yagi antenna is presented for the X-band with 3.2 dBi gain and 11 dB front-to-back ratio measured at 10 GHz.
Abstract: A novel uniplanar coplanar waveguide-fed quasi-Yagi antenna is presented. The originality of this design is because of its feed selection and its elliptical structure and in doing so achieving a wide bandwidth and compact size. An X-band prototype is developed and measures a bandwidth of 40%, with 3.2 dBi gain and 11 dB front-to-back ratio measured at 10 GHz. The antenna is realised on a high dielectric constant substrate and is compatible with monolithic microwave integrated circuits and solid-state devices.
33 citations
"Miniaturized broadband Quasi-Yagi a..." refers methods in this paper
...Another miniaturized Quasi-Yagi antenna is presented in [7] with a coplanar waveguide-fed and curve strip....
[...]