Coplanar Inverted-F Antenna With Open-End Ground Slots for Multiband Operation

Razali, Ahmad Rashidy; Bialkowski, M.E.

doi:10.1109/lawp.2009.2031330

Cited by 51 publications

(32 citation statements)

References 9 publications

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“…In some situations, the ground plane cannot be enlarged due to mechanical requirements given by the phone manufacturer. In those cases, if the bandwidth needs to be improved, some techniques adding intelligence in the ground plane can be used such as for example adding slots in the ground plane [2][3][4][5][6][7][8][9][10][11][12] or adding metallic strips [13][14][15][16][17]. As an example, the proposed method is used here to give a physical insight into the behavior of adding metallic strips to a ground plane having 100 mm length (Fig.…”

Section: Enlarging the Ground Plane With Metallic Stripsmentioning

confidence: 99%

“…Another technique employs slots in the ground plane for enhancing the bandwidth and radiation efficiency of handset antennas [2][3][4][5][6][7][8][9][10][11][12]. The present RCS method is useful for this case to establish a comparison between other methods to enlarge the ground plane as the one having a metallic strip presented in the previous section (Fig.…”

Section: Enlarging the Ground Plane With Slotsmentioning

confidence: 99%

“…In this regard, handset antennas operating in the frequency region of 698-960 MHz where some standards are allocated (LTE700, GSM850/900), would require a ground plane length of 144.7 mm (computed at 829 MHz), which is too long for many devices. To solve this size limitation, some authors have proposed mechanisms to electrically enlarge the ground plane by using slots or metallic strips to better excite its radiation mode, and as a consequence, larger bandwidth and efficiency are obtained [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Ground Plane Contribution in Wireless Handheld Devices Using Radar Cross Section Analysis

Anguera¹,

Andújar²

2012

PIER M

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Abstract-The ground plane of wireless handheld devices plays a significant role in the electromagnetic behavior determining bandwidth, efficiency, and radiation patterns. Therefore, it is necessary to determine the frequency region where the ground plane can be better excited, especially for low frequencies where the performance of the radiating system is critical due to size limitations with respect to the operating wavelength. A fast method based on the radar cross section (RCS) is presented for computing the frequency at which the ground plane is better excited. The proposal is applied to three typical wireless platforms: a handset phone, a smartphone, and a clamshell phone. The method is compared with characteristic mode analysis and the results demonstrate a very good agreement in the resonant frequency prediction. In addition, complex platforms using metallic strips and slots in the ground plane are analyzed using RCS which gives physical insight into the electromagnetic performance.

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Section: Enlarging the Ground Plane With Metallic Stripsmentioning

confidence: 99%

Section: Enlarging the Ground Plane With Slotsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ground Plane Contribution in Wireless Handheld Devices Using Radar Cross Section Analysis

Anguera¹,

Andújar²

2012

PIER M

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“…In [1] and [2], the triple band is formed by a coupling between a monopole antenna and a parasitic resonator positioned on the bottom of the substrate. In [3], in order to cover the 2.4 GHz band, an inverted-F antenna is used; its ground uses two slots, one for the 3.5 GHz band and the other for the 5.5 GHz band. In [4], a structure that has various current paths obtains different resonances through two strips added to a rectangular radiating element fed asymmetrically by a trapezoidal ground plane.…”

Section: ⅰ Introductionmentioning

confidence: 99%

A Compact Triple Band Antenna for a Wireless USB Dongle

Lee¹,

Sung²

2012

Journal of electromagnetic engineering and science

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A compact monopole antenna possessing triple resonance (f1, f2, f3) characteristics for (USB) dongle applications is presented. The resonance characteristic f1 is determined by the overall length of the antenna. The monopole antenna acts as the main radiator for f3 as well as the coupling feeding structure for the parasitic resonators in f1, f2. The resonance characteristic f2 is achieved by a combination of the capacitance formed by the coupling between the top and bottom parasitic substrate resonators and the inductance generated by a via bridging the two parasitic resonators.Key words: Monopole Antenna, (USB) Dongle Application. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Ⅰ. IntroductionBecause of the rapid development of wireless communication technology, recent research has focused on compact multiband antennas. Among these structures, multiband antennas for USB dongles are of particular interest because they are portable and enable the easy exchange of information based on a simple plug and play interface. Accordingly, several triple band antennas for USB dongle applications have been studied [1]～[4]. In [1] and [2], the triple band is formed by a coupling between a monopole antenna and a parasitic resonator positioned on the bottom of the substrate. In [3], in order to cover the 2.4 GHz band, an inverted-F antenna is used; its ground uses two slots, one for the 3.5 GHz band and the other for the 5.5 GHz band. In [4], a structure that has various current paths obtains different resonances through two strips added to a rectangular radiating element fed asymmetrically by a trapezoidal ground plane. However, the size of these structures is not suitable for wireless USB dongle applications. This paper presents a triple band monopole antenna for wireless USB dongle applications. The authors have previously presented a dual-band antenna resonating at 2.4/5.2/5.8 GHz for wireless USB dongle applications [5]. The design of the proposed antenna is based on the structure outlined in [5]. A parasitic resonator in the bottom of the substrate is added to the proposed antenna and is connected to the top parasitic resonator by a via, which enables the 3.5 GHz band for WiMAX service to be added to our previous dual-band (f1, f3) antenna. In addition, because the top parasitic resonator is folded into a P-shape, the size of the proposed antenna is reduced by 50 % compared to the monopole antenna found in [5]. Ⅱ. Antenna GeometryAs Fig. 1(a) shows, the proposed antenna is composed of a monopole antenna and a parasitic radiator. The monopole is bent down to the substrate with the aim of reducing the space occupied by the antenna and effectively controlling the coupling to the parasitic radiator. In addition, the top parasitic resonator is folded into a P-shape...

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“…Although many conventional multiband techniques exist such as multi-mode resonator or multi-resonator [18], they are difficult to implement in reconfigurable slot antennas. Recently, a coplanar inverted-F antenna (CIFA) with ground slots has been reported in [19]. It is capable to generate a new higher-band resonance from a ground slot without affecting its original resonance of the patch radiator.…”

Section: Introductionmentioning

confidence: 99%