Mutual coupling reduction of low-profile monopole antennas on high-impedance ground plane

Xin, Hao; Matsugatani, Kazuoki; Kim, M.; Hacker, J.B.; Higgins, J.A.; Rosker, Mark J.; Tanaka, Masakazu

doi:10.1049/el:20020575

Cited by 25 publications

(9 citation statements)

References 2 publications

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“…It is important to increase the isolation between the low-band and high-band antennas in dual antenna configurations as much as possible in order to reduce the mutual coupling and the interference between them. Usually, special techniques have to be used in order to suppress or reduce the mutual coupling between adjacent antennas in multiantenna configurations [6][7][8][9][10][11]. The isolation between the two antennas of the above three dual antenna configurations is investigated.…”

Section: The Isolation Between the Low-band And High-band Antennasmentioning

confidence: 99%

Low-Interference Dual Resonant Antenna Configurations for Multistandard Multifunction Handsets and Portable Computers

Sanad¹,

Hassan

2012

International Journal of Antennas and Propagation

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Low-interference dual resonant antenna configurations are developed for multistandard multifunction mobile handsets and portable computers. Only two wideband resonant antennas can cover most of the important wireless applications in portable communication equipment. The frequency bands of the dual antenna configuration can be adjusted according to the wireless applications that are required to be covered. The bandwidth that can be covered by each antenna is about 80% without using matching or tuning circuits. Three sample dual antenna configurations with different frequency bands are presented. The interference between the low-band and high-band antennas of these three configurations is investigated, and the ways of reducing this interference are studied. The most effective factor on the interference between the low-band and high-band antennas is their relative orientations. When the low-band and high-band antennas of each configuration are perpendicular to each other, the isolation between them significantly increases. This eliminates the need for any special tools or techniques to suppress the mutual coupling between them. The new antennas have very small cross-sectional areas, and they are made of a flexible material. They do not require any additional components or ground planes. They can be used as internal, external, or partially internal and partially external antennas.

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Section: The Isolation Between the Low-band And High-band Antennasmentioning

confidence: 99%

Low-Interference Dual Resonant Antenna Configurations for Multistandard Multifunction Handsets and Portable Computers

Sanad¹,

Hassan

2012

International Journal of Antennas and Propagation

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“…A straightforward way to reduce the mutual coupling of monopole antennas on high-impedance ground plane was developed in [2] In this paper, various EBG structures like conventional mushroom, Jerusalem cross slot and slot loaded EBGs are inserted between a two element microstrip line fed monopole antenna array to reduce the strong mutual coupling of coupled microstrip antennas. The performance and the mutual coupling are compared with and without the EBG structures with the Method of Moment simulations.…”

Section: Introductionmentioning

confidence: 99%

“…A straightforward way to reduce the mutual coupling of monopole antennas on high-impedance ground plane was developed in [2]. EBGs built in microstrip technology have gained much attention in the last years, following their application in antenna technology introduced in [3]- [5].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Compact EBG Structures on the Mutual Coupling Reduction of Antenna Arrays

Margaret¹,

Subasree²,

Susithra³

et al. 2014

IJET

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Abstract-Mutual coupling is a critical issue in compact array design and reducing this is one of the main efforts in Microstrip antenna array design. Periodic structures can help in this situation by suppressing surface wave propagation in a given frequency range. The purpose of this work is to show the viability of using 2D EBG structures to this aim. This paper presents a double element Microstrip antenna array inserted with the EBG structures like conventional mushroom, Jerusalem cross slot and slot loaded EBGs around 5-6 GHz. The performances are compared for mutual coupling reduction. Simulated results verify the improvement in performance of the antenna array compared to the array antenna without EBG. The slot loaded EBG is found to be good showing a 5.8dB mutual coupling reduction. Index Terms-Electromagnetic bandgap (EBG) structures,microstrip antenna arrays, mutual coupling, surface wave. I. INTRODUCTIONMicrostrip antenna arrays have been popular for decades because they exhibit a low profile, small size, lightweight, low manufacturing cost, high efficiency, and an easy method of fabrication and installation. Furthermore, they are generally economical to produce since they are readily adaptable to hybrid and monolithic integrated circuits fabrication techniques at radio frequency (RF) and microwave frequencies however, significant degradation of performance happens due to mutual coupling between the antenna elements [1]. An antenna that is placed on a highpermittivity dielectric substrate may couple power into substrate modes. As substrate modes do not contribute to the primary radiation pattern, these modes are a loss mechanism which reduces as high as 60% of the radiated power and reduce the antenna efficiency.Various techniques are explicitly designed to suppress the surface wave. A straightforward way to reduce the mutual coupling of monopole antennas on high-impedance ground plane was developed in [2] In this paper, various EBG structures like conventional mushroom, Jerusalem cross slot and slot loaded EBGs are inserted between a two element microstrip line fed monopole antenna array to reduce the strong mutual coupling of coupled microstrip antennas. The performance and the mutual coupling are compared with and without the EBG structures with the Method of Moment simulations. II. EBG STRUCTURE CONFIGURATIONThe conventional mushroom like EBG structure was proposed in [3], [4]. It consists of four parts: a ground plane, a dielectric substrate, metallic patches and connecting vias as shown in Fig. 1(a). The operation mechanism of this EBG structure can be explained by an LC filter array which is shown in Fig. 1(b), the inductor L results from the current flowing through the vias, and the capacitor C due to the gap effect between the adjacent patches. For an EBG structure with patch width W, gap width g, substrate thickness h and dielectric constant ε r , the values of the inductor L and capacitor C are determined by the following formula: These formulas (1)- (4) are very simple and but their results...

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“…Electromagnetic band gap (EBG) structures show the characteristics of forbidding the propagation of electromagnetic waves in certain frequency range and this has been applied in antenna designs [11]. One of the applications is to reduce the mutual coupling between antennas [12], in which the EBG structure is put between two antenna elements and a much higher isolation is obtained.…”

Section: Introductionmentioning

confidence: 99%

CPW Fed Double T-Shaped Array Antenna with Suppressed Mutual Coupling

Danideh¹,

Neyestanak²

2010

IJCNS

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A compact CPW-fed double T-Shaped antenna is proposed for dual-band wireless local area network (WLAN) operations. For the proposed antenna, the -10 dB return loss bandwidth could reach about 25.5% for the 2.4 GHz band and 5.7 % for the 5 GHz band, which meet the required bandwidth specification of WLAN standard. To reduce the mutual coupling and get high isolation between two dual-band antennas, we proposed the novel electromagnetic band gap (EBG) structures. When the EBG structure is employed, a -13dB and -30dB mutual coupling reduction is achieved at 2.4 and 5.2 GHz. It shows that the features of small size, uniplanar structure, good radiation characteristics and small mutual coupling are promising for multi-input multi-output (MIMO) applications.

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Mutual coupling reduction of low-profile monopole antennas on high-impedance ground plane

Cited by 25 publications

References 2 publications

Low-Interference Dual Resonant Antenna Configurations for Multistandard Multifunction Handsets and Portable Computers

Low-Interference Dual Resonant Antenna Configurations for Multistandard Multifunction Handsets and Portable Computers

Comparison of Compact EBG Structures on the Mutual Coupling Reduction of Antenna Arrays

CPW Fed Double T-Shaped Array Antenna with Suppressed Mutual Coupling

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