A novel broadband multislot antenna fed by microstrip line

Lui, W. J.; Cheng, Chonghu; Cheng, Yong; Zhu, Hongbo

doi:10.1002/mop.20721

Cited by 18 publications

(8 citation statements)

References 9 publications

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“…Many attempts have been made to increase the operation bandwidth of printed slot antennas, such as employing ultra-wide rectangular [1,2] and bow-tie [3,4] slots, and using a rectangular widened-tuning stub or an offset-tuning stub [5,6]. Other design schemes, such as those using a folded-slot [7], circular-slot [8], or multislot [9] structure, have also been proposed to achieve wideband performance.…”

Section: Introductionmentioning

confidence: 99%

A compact ultra-wideband CPW-fed slot antenna with a forklike stub

Lui¹,

Cheng²,

Cheng³

et al. 2005

Microw. Opt. Technol. Lett.

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INTRODUCTIONRecently, there has been much interest in developing high-datarate systems, known as ultra-wideband (UWB) communication systems, with available bandwidths that cover 3.1 to 10.6 GHz. One of the most important issues in a UWB system is to develop compact-sized and wideband antennas. Printed slot antennas, especially coplanar waveguide (CPW)-fed slot antennas, exhibit a number of merits such as wide bandwidth, omnidirectional radiation pattern, ease of design and fabrication, and the capability be integrated with monolithic microwave integrated circuits (MMICs). These advantages make it an attractive candidate for UWB application. Many attempts have been made to increase the Other design schemes, such as those using a folded-slot [7], circular-slot [8], or multislot [9] structure, have also been proposed to achieve wideband performance.In this paper, a novel UWB slot antenna fed by a grounded CPW is proposed. For this design, a forklike tuning stub and a polygonlike wide slot are employed in order to enhance its operation bandwidth. An impedance bandwidth of about 3.2:1 is achieved. The characteristics of the antenna's radiation patterns and gain over the entire operation frequency range are also given and discussed. DESCRIPTION OF THE ANTENNAThe schematic diagram of the novel antenna and its dimension parameters are shown in Figure 1. The antenna is fabricated on a dielectric substrate with relative permittivity r ϭ 2.65, loss tan ␦ of 0.001, and thickness h ϭ 1 mm, and it has a compact volume of 36 ϫ 33 ϫ 1 mm 3 . The antenna is fed by a grounded CPW. As shown in Figure 1, the size of the back ground plane is only 30 ϫ 5.5 mm 2 ; thus, there is no conductor ground plane on the back of the wide slot. A forklike tuning stub and a polygonlike wide slot are designed to increase the antenna's operation bandwidth. EXPERIMENTAL RESULTSThe return loss of the antenna is calculated using Zeland's IE3D and measured using Agilent's HP8720E vector network analyzer. The calculated and measured results are given and compared in Figure 2. It is observed that the impedance bandwidth for return loss of less than Ϫ9.5 dB is from 2.89 to 9.19 GHz. Thus, an impedance bandwidth of about 3.2:1 has been achieved.Radiation patterns of the antenna in the z-y and z-x planes at three different frequencies over the operation frequency range are measured in a chamber and given in Figure 3. We can observe that relative constant radiation patterns and good omnidirectional performance can be achieved over the entire frequency range. Thus, the operation bandwidth of the antenna can be determined to be the same as its impedance bandwidth. The antenna gain is also measured in a chamber, as shown in Figure 4. We can see from the figure that gain flatness with a maximum variation of about 2 dB can be achieved. CONCLUSIONA novel compact UWB slot antenna fed by a grounded CPW has been proposed, and the calculated and experimental results have been presented. From the measured results, UWB performance of more than 3.2:1 and omnidirectional p...

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Section: Introductionmentioning

confidence: 99%

A compact ultra-wideband CPW-fed slot antenna with a forklike stub

Lui¹,

Cheng²,

Cheng³

et al. 2005

Microw. Opt. Technol. Lett.

Self Cite

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“…Although the studies on the size reduction and the bandwidth enhancement of the slot antenna are in minority, a new concept of open slot antenna reported in [7][8] and many recently novel techniques for bandwidth enhancement used in [9][10][11][12] give us some inspiration to solve the above problems. It's obvious that open slot antenna is superior in its wideband characteristic with a small size.…”

Section: Introductionmentioning

confidence: 99%

“…The operation bandwidth is still limited for ultra-wideband applications. Meanwhile, the different latest designation techniques to improve the operating bandwidth are proposed in [6,[9][10][11][12]. Among these studies, the techniques such as with a self-similar slot [6], with a rotated slot [9], with multiple resonant slots [10][11], and with a pair of parasitic elements [12] have been found versatile and efficient.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the different latest designation techniques to improve the operating bandwidth are proposed in [6,[9][10][11][12]. Among these studies, the techniques such as with a self-similar slot [6], with a rotated slot [9], with multiple resonant slots [10][11], and with a pair of parasitic elements [12] have been found versatile and efficient. But the operating bandwidth [9][10][11][12] is achieved only over a limited frequency range from 1.8 to about 8.8GHz; what is more, a large size [6,[9][10][11][12] with complicated designs is an obvious deficiency in the application of the miniaturization.…”

Section: Introductionmentioning

confidence: 99%

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A corner-truncated patch scheme of bandwidth enhancement for open slot antenna

Song

Yin

Xie

et al. 2010

2010 International Symposium on Signals, Systems and Electronics

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In In In In this this this this paper, paper, paper, paper, a a a a novel novel novel novel corner corner corner corner----truncated truncated truncated truncated patch patch patch patch scheme scheme scheme scheme is is is is described described described described to to to to enhance enhance enhance enhance the the the the operation operation operation operation bandwidth bandwidth bandwidth bandwidth of of of of the the the the open open open open slot slot slot slot antenna antenna antenna antenna for for for for UWB UWB UWB UWB applications. applications. applications. applications. B B B By y y y truncating truncating truncating truncating two two two two corner corner corner corners s s s from from from from the the the the rectangular rectangular rectangular rectangular patch, patch, patch, patch, t t t the he he he bandwidth bandwidth bandwidth bandwidth enhancement enhancement enhancement enhancement of of of of the the the the proposed proposed proposed proposed open open open open slot slot slot slot antenna antenna antenna antenna is is is is well well well well realized. realized. realized. realized. From From From From t t t the he he he simulation simulation simulation simulation and and and and measurement measurement measurement measurement results, results, results, results, it it it it is is is is show show show shown n n n that that that that the the the the corner-truncated corner-truncated corner-truncated corner-truncated

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“…The embedded vertical slots work at approximate half wavelength. Minor difference in the slot's lengths would contribute to widen the impedance bandwidth [13].…”

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confidence: 99%

A Wideband U-Shaped Slot Antenna and Its Application in MIMO Terminals

Chen

Chu

2016

Antennas Wirel. Propag. Lett.

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a wideband microstrip multiple-input-multipleoutput (MIMO) antenna with U-shaped slot is presented in this paper. To widen the impedance bandwidth, a uniform and stepped U-shaped slot antennas are sequentially investigated. Two types of resonant modes are excited, including slot mode and monopole mode. Then, additional multiple slots embedded inside the U-shaped slot are employed to further widen the bandwidth. The proposed slot antenna features wide bandwidth (109%) and compact slot size (0.16 λ g × 0.27 λ g , where λ g is the guided wavelength at the lowest operating frequency) simultaneously. The proposed slot antenna element is then applied in the MIMO antenna system. Both the two antennas are suitable for handheld devices, covering GPS/GSM1800/LTE/UMTS/WLAN/WiMAX/ UWB (lower) band.  Index Terms-slot antenna, stepped slot, MIMO antenna, wide bandwidth 1536-1225 (c)

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A novel broadband multislot antenna fed by microstrip line

Cited by 18 publications

References 9 publications

A compact ultra-wideband CPW-fed slot antenna with a forklike stub

A compact ultra-wideband CPW-fed slot antenna with a forklike stub

A corner-truncated patch scheme of bandwidth enhancement for open slot antenna

A Wideband U-Shaped Slot Antenna and Its Application in MIMO Terminals

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