Superstrate-integrated Switchable Beam Rectangular Microstrip Antenna for Gain Enhancement

Kawdungta, Supakit; Jaibanauem, P.; Pongga, R.; Phongcharoenpanich, Chuwong

doi:10.13164/re.2017.0430

Cited by 5 publications

(8 citation statements)

References 22 publications

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“…The cross-polarization levels (XPL) in the xyand the xz-plane were -22 dB and -35 dB, respectively. The discrepancy between the copolarization patterns of [27] and this current research (Figure 4) was attributable to different antenna structures. Specifically, in [27], the antenna structure consisted of one radiation patch and two parasitic patches mounted on either side of the radiation patch.…”

Section: Feeding Pointcontrasting

confidence: 77%

“…The microstrip feed line was located at the corner of the radiation patch to achieve the resonant frequency (2.45 GHz) and horizontal polarization, given the radiation-patch width of w1. The stepped microstrip line was incorporated into the feed line to improve the impedance bandwidth of the antenna [27]. The rectangular microstrip antenna without superstrate could achieve the resonant frequency range of 2.4-2.5 GHz with an impedance bandwidth of 70 MHz and 6 dBi antenna gain.…”

Section: Feeding Pointmentioning

confidence: 99%

“…To enhance the impedance bandwidth and gain, FR4 dielectric superstrate was placed above the radiating patch of the rectangular microstrip antenna [27]. The distance between the superstrate and radiating patch (d1) was varied in the range of 1 -10 mm.…”

Section: Feeding Pointmentioning

confidence: 99%

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Switched Beam Multi-Element Circular Array Antenna Schemes for 2D Single-Anchor Indoor Positioning Applications

Kawdungta

Torrungrueng

et al. 2021

IEEE Access

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This research investigates four switched-beam multi-element circular array antenna schemes operating at 2.4-2.5 GHz for two-dimensional (2D) single-anchor indoor positioning applications. The realization of the proposed antenna schemes involved two evolutionary stages: rectangular microstrip antenna with dielectric superstrate (i.e., element) and multi-element circular array antenna with radio frequency (RF) switch network. The number of elements of circular array antennas was varied between 4, 5, 6, and 8 elements. Multiple signal classification (MUSIC) algorithm was used to determine the direction of incoming signal and Friis transmission equation to estimate the transmission distance. Simulations were carried out, and results showed that the rectangular microstrip antenna with dielectric superstrate (one single element) achieved impedance matching (|S11|<-10 dB) in the frequency range of 2.4-2.5 GHz, with unidirectional radiation pattern and 6.65 dBi antenna gain. In addition, four-, five-, six-, and eight-element circular array antenna prototypes were fabricated and experiments carried out in an indoor environment with two, three, and four incoming signals. The experimental results indicated that the eight-element circular array antenna could be deployed to reliably determine signal direction and distance, particularly for indoor localization with two incoming signals. The novelty of this work lies in the potential use of switched-beam multi-element circular array antenna schemes in place of conventional adaptive array antennas for 2D indoor localization. Compared with the conventional adaptive array antennas, the proposed multi-element circular array antenna schemes are relatively low-cost and easy to fabricate.

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Section: Feeding Pointcontrasting

confidence: 77%

Section: Feeding Pointmentioning

confidence: 99%

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Switched Beam Multi-Element Circular Array Antenna Schemes for 2D Single-Anchor Indoor Positioning Applications

Kawdungta

Torrungrueng

et al. 2021

IEEE Access

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“…Applying EBG structures leads to many new antennas and applications [12][13][14]. These structures can remove the unwanted effects of substrates and cause gain enhancement [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Bandwidth improvement of planar antennas using a single-layer metamaterial substrate for X-band application

Borazjani

Naser-Moghadasi

Rashed-Mohassel

et al. 2020

Int. J. Microw. Wireless Technol.

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To prevent far-field radiation characteristics degradation while increasing bandwidth, an attempt has been made to design and fabricate a microstrip antenna. An electromagnetic band gap (EBG) structure, including a layer of a metallic ring on a layer of Rogers 4003C substrate, is used. For a better design, a patch antenna with and without the EBG substrate has been simulated. The results show that the bandwidth can be improved up to 1.6 GHz in X-band by adding the EBG substrate. Furthermore, using this structure, a dual-band antenna was obtained as well. Finally, to validate the simulation results, a comparison has been done between simulation data and experimental results which demonstrate good agreement.

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“…Multi-beam antenna can form several narrow beams to cover specific area for the signal transmission in wireless communication system [1][2][3]. Comparing with the single beam antenna, multiple-beam antenna can have a higher gain and a better signal to noise ratio, which leads to the increased coverage for rejecting interference from co-channel reuse cells in mobile communication system [4].…”

Section: Introductionmentioning

confidence: 99%

A Novel Tri-Beam Antenna System Based on U-Shaped Dipole

Dai¹,

Luo²,

Jin³

et al. 2019

RADIOENGINEERING

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Consisting of 6 radiating elements and a 3 × 3 Butler matrix, a novel tri-beam antenna system is proposed in this paper. The radiating element consists of two U-shaped arms and coupled strips, which shows a wide impedance characteristic. Three branch line couplers and four -90° phase shifters are combined into 3 × 3 Butler matrix as a beam-forming network (BFN). In order to avoid the crossover of transmission lines, one main line of a 1.76 dB coupler is designed and located between two 3 dB couplers. With this arrangement, the signal from one input port can be divided into three output signals with equal amplitude and specified phase differences of 0°, +120° and -120°. Furthermore, a 2 × 3 antenna array is connected with this BFN for three orthogonal beams. Measured results show that three beams at θ = 0°, 40° and -40° are produced when different input ports are excited.

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Superstrate-integrated Switchable Beam Rectangular Microstrip Antenna for Gain Enhancement

Abstract: 0, 30 and 330 (xy-plane). Moreover, the findings validate the applicability of either the dielectric slab or three MTM block-layers as the superstrate to improve the antenna gain.

Cited by 5 publications

References 22 publications

Switched Beam Multi-Element Circular Array Antenna Schemes for 2D Single-Anchor Indoor Positioning Applications

Switched Beam Multi-Element Circular Array Antenna Schemes for 2D Single-Anchor Indoor Positioning Applications

Bandwidth improvement of planar antennas using a single-layer metamaterial substrate for X-band application

A Novel Tri-Beam Antenna System Based on U-Shaped Dipole

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