Rectangular microstrip antenna with dumbbell shaped defected ground structure for improved cross polarised radiation in wide elevation angle and its theoretical analysis

Ghosh, Abhijyoti; Chakraborty, Subhradeep; Chattopadhyay, Sudipta; Nandi, Arnab; Basu, Banani

doi:10.1049/iet-map.2015.0179

Cited by 49 publications

(18 citation statements)

References 26 publications

(30 reference statements)

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“…Consequently it may affect the radiation property of RMA. Some recent investigations clearly demonstrate that the electric fields corresponding to the next higher order orthogonal mode TM 02 , which in fact, is situated near nonradiating edges of the patch is the major factor which contributes in XP radiation. The electric field component corresponding to TM 02 mode beneath the patch as obtained from is

E_{x} = C \cos \frac{2 π}{W} z

…”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

“…A clear physical insight in to the observed improvement in XP radiation may also be extorted out from the distribution of electric field magnitude over the patch surface, which is depicted in Figure . The thorough literatures establish that, the main sources of XP are the radiation from nonradiating edges and patch corners of a RMA. Therefore, to reduce the radiation from nonradiating edges, we need to minimize the field magnitude there.…”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

See 1 more Smart Citation

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Ghosh

Chattopadhyay

Singh

et al. 2017

Int J RF Microw Comput Aided Eng

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A simple and single element wide slot dipole loaded shorted rectangular microstrip antenna has been proposed and investigated experimentally for broad impedance bandwidth and improved cross polarized (XP) radiation compared to maximum co‐polarized (CP) gain without changing the co‐polarized (CP) radiation pattern. Around 23‐35 dB isolation between CP and XP radiation along with 25% impedance bandwidth is achieved with the proposed structure. The measured gain of the antenna is around 6.2 dBi over the entire band. The present antenna is very simple and easy to manufacture. Unlike the other structures, the present one is free from back radiation in terms of XP fields. The design of the antenna structure is theoretically justified and rigorously analyzed. The present investigation provides an insightful, clear visualization‐based understanding of the concurrent improvement in both the impedance bandwidth and XP performance with the present structure.

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E_{x} = C \cos \frac{2 π}{W} z

…”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

Section: Theoretical Analysis and Designmentioning

confidence: 99%

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Ghosh

Chattopadhyay

Singh

et al. 2017

Int J RF Microw Comput Aided Eng

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“…It increases with the size of dot-type defect and consequently reduces the Q factor, which in turn, enhances the impedance bandwidth. Moreover, the fields of orthogonal component of dominant mode that lies near the patch corners also contribute to XP radiation as is evident from [11,14,15]. 2.…”

Section: I T H E O R E T I C a L B A C K G R O U N D A N D P A R mentioning

confidence: 99%

“…Around 16% impedance band width with more than 25 dB of CP-XP isolation is revealed in [14] for RMA. One very recent report [15] shows the theoretical analysis of rectangular-headed dumbbell DGS-integrated RMA, where around 25 dB of CP-XP isolation is achieved for all width to length ratios (0.8 to 1.6) of a patch.…”

Section: Introductionmentioning

confidence: 99%

Arc-cornered microstrip antenna with defected ground structure for broad banding and improved cross-polarization suppression over whole skew planes

Chakraborty¹,

Chattopadhyay²

2015

Int. J. Microw. Wireless Technol.

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Arc-cornered microstrip antenna with defected ground structure for broad banding and improved cross-polarization suppression over whole skew planes subhradeep chakraborty and sudipta chattopadhyay Defected ground structure (DGS)-integrated arc-cornered rectangular microstrip antenna (RMA) has been investigated to achieve broadband along with high co-polarized to cross-polarized radiation (CP-XP) isolation over principal as well as over skew planes without affecting the dominant mode co-polarized (CP) radiation pattern. The present arc-cornered RMA on circular and rectangular dot-type DGS is thoroughly studied and compared with the conventional rectangular microstrip antenna. In the present paper, a crucial emphasis is given to improve CP-XP isolation in all the skew planes and by employing circular dot-type DGS around 20 dB CP-XP isolation is achieved over whole skew planes as well as in the H-plane with the proposed structure with 20% impedance bandwidth. On the contrary, the CP-XP isolation and impedance bandwidth vary in opposite manner in case of the rectangular dot-type DGS. Around 25 and 10 dB CP-XP isolation with 9 and 22% impedance bandwidth have been obtained with thin and thick rectangular dot-type DGS, respectively. The corners of the patch surface are rounded in such a way to reduce spurious radiations from the sharp corners, which are generally attributed for high XP radiation along the diagonal directions.

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“…The asymmetry of the probe location results in asymmetry in the near fields in the vicinity of the antenna, causing high XP radiation in the Hplane of the antenna. XP reduction using symmetric arcshaped DGS [7], asymmetric DGS [8], a strategic design of DGS [9], and a dumbbell shaped DGS, without affecting co-polarized radiation pattern [10] have been explored to understand the effectiveness of DGSs towards this issue. It has been found that the XP reduction along with proper impedance matching is a difficult task for the MSA designers.…”

Section: Introductionmentioning

confidence: 99%

Defected Ground Structure toward Cross Polarization Reduction of Microstrip Patch Antenna with Improved Impedance Matching

Acharjee¹,

Singh²,

Mandal³

et al. 2019

RADIOENGINEERING

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A new approach based on the incorporation of Zshaped defected ground structure (DGS) in microstrip antenna (MSA) for improving impedance matching and cross polarization (XP) performances is proposed in this paper. Through detail analysis of the surface current densities, and input impedance, the proposed DGS is integrated into a rectangular MSA (RMSA) to realize flat relative XP reduction of 22 dB in the H-plane around broadside angular range of ±60°. Further, an equivalent circuit model (ECM) for the proposed antenna is introduced by considering the mutual coupling in between the DGS and patch and the model is verified using circuit-system-EM cosimulation software, Advanced Design System (ADS). A prototype has been fabricated and tested for the validation of simulated results and it shows good agreement with each other. The antenna operates over 2. 32-2.58 GHz with good far-field radiation characteristics and a peak gain of 2.8 dBi at the resonating frequency 2.4 GHz. Hence, the proposed design can be useful for the IEEE 802.11b applications.

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Rectangular microstrip antenna with dumbbell shaped defected ground structure for improved cross polarised radiation in wide elevation angle and its theoretical analysis

Cited by 49 publications

References 26 publications

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Wide bandwidth microstrip antenna with defected patch surface for low cross polarization applications

Arc-cornered microstrip antenna with defected ground structure for broad banding and improved cross-polarization suppression over whole skew planes

Defected Ground Structure toward Cross Polarization Reduction of Microstrip Patch Antenna with Improved Impedance Matching

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