Improved Cross-Polarized Radiation and Wide Impedance Bandwidth From Rectangular Microstrip Antenna With Dumbbell-Shaped Defected Patch Surface

Chakraborty, Subhradeep; Ghosh, Abhijyoti; Chattopadhyay, Sudipta; Singh, L. Lolit Kumar

doi:10.1109/lawp.2015.2430881

Cited by 36 publications

(29 citation statements)

References 18 publications

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“…Now, following, the reactance of the slot X s comes parallel to patch input impedance which can be obtained from . The equivalent circuit for short slot dipole loaded patch is presented in Figure B.…”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

“…The equivalent circuit for short slot dipole loaded patch is presented in Figure B. Hence, the real and imaginary part of the impedance of RMA with short slot dipole loaded defected patch surface may be calculated following …”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

“…It reveals that, the input reactance varies slowly with frequency, when, defected slots on the patch surface are present, compared to a conventional RMA without slot defect on the patch surface. In fact, the sharp variation of input reactance noticeably limits the operating bandwidth of conventional RMA as is customary from . When the wide slots (slot length to width ratio ∼ 1.7) are placed on the patch surface, it becomes similar to its complementary thick dipole (with small length to diameter ratio ∼ 3.4) .…”

Section: Theoretical Analysis and Designmentioning

confidence: 99%

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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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Section: Theoretical Analysis and Designmentioning

confidence: 99%

Section: Theoretical Analysis and Designmentioning

confidence: 99%

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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“…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%

“…The suppression of XP fields in principal planes does not effectively suppress the XP radiation in diagonal or other skew planes. Similarly, more than 25 dB of CP-XP isolation in the principal H-plane is evident from [14] with only 16 dB of CP-XP isolation in the 458 diagonal planes. The completely pure polarization in all principal and other skew planes is very much required for several wireless communication systems and especially for array applications and polarization reuse purpose.…”

Section: Introductionmentioning

confidence: 96%

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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A modified fractal‐shaped slotted patch antenna with defected ground using metasurface for dual band applications

Samantaray

Bhattacharyya

Srinivas

2019

Int J RF Microw Comput Aided Eng

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A novel modified fractal‐shaped slotted patch antenna employing metasurface at bottom plane along with partial ground has been proposed in this work for dual band applications with significant gain. A 4 × 5 order metasurface has been formed in the ground plane by introducing a periodic combination of two L‐type patches with centered C‐type shaped patch. The top conductor and the ground plane are designed on a 1.6 mm thick FR4 dielectric with the dimension of 28 × 28 mm2. The antenna is designed in such a way that it operates over the dual frequency ranges viz., 1.80 to 5.70 GHz and 10.38 to 10.94 GHz. The maximum return loss of 21 dB has been achieved over 2.60 GHz while the maximum realized gain of 7.16 dBi has been obtained at 10.92 GHz. The designed antenna offers omnidirectional radiation characteristics in the first band while directional radiation characteristics have been observed in the second band. The proposed antenna can be utilized for WiMAX 3.5/5.5 GHz, mobile, radio astronomy, and microimaging in medical analysis.

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Improved Cross-Polarized Radiation and Wide Impedance Bandwidth From Rectangular Microstrip Antenna With Dumbbell-Shaped Defected Patch Surface

Cited by 36 publications

References 18 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

A modified fractal‐shaped slotted patch antenna with defected ground using metasurface for dual band applications

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