Rectangular microstrip patch with symmetrically shaped defected ground structure for improved cross-polarization characteristics
01 Dec 2015-pp 1-2
TL;DR: In this article, a symmetric defected ground structure (DGS) integrated rectangular microstrip patch antenna (RMPA) was realized with an aim to improve the cross polarization (XP) properties of the patch over principal radiation planes.
Abstract: A symmetric defected ground structure (DGS) integrated rectangular microstrip patch antenna (RMPA) has been realized with an aim to improve the cross polarization (XP) properties of the patch over principal radiation planes. Patches with different aspect ratio values have been examined. Proposed DGS is very well suited for specific applications such as dual-polarized design with high co- to cross-pol isolation. C-band design with varying aspect ratio (W/L = 1.6, 1.25, 1.0 and 0.8) has been presented. It is evident from the results that up to 17 dB suppression in H-plane XP level can be achieved.
Citations
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01 Feb 2017
TL;DR: Various techniques to overcome limitations of microstrip patch antenna are depicted.
Abstract: Modern communication devices supports higher bandwidth applications. So the antenna required for such applications should have wider bandwidth and should be smaller in size. Being easy to fabricate, low volume and inexpensive microstrip patch antenna is widely used for wireless communication applications. But disadvantages like low gain, narrow bandwidth, etc. limits the performance of microstrip patch antenna. This paper depicts various techniques to overcome limitations of microstrip patch antenna.
6 citations
Cites methods from "Rectangular microstrip patch with s..."
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Patent•
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31 May 2019
TL;DR: In this article, a low-radar-scattering-cross-section microstrip antenna consisting of a dielectric substrate, a radiation patch, an artificial magnetic conductor surface, a metal floor, and a defect ground is presented.
Abstract: The invention provides a low-radar-scattering-cross-section microstrip antenna comprising: a dielectric substrate, a radiation patch, an artificial magnetic conductor surface, a metal floor, and a defect ground. The artificial magnetic conductor surface constitutes a checkerboard structure by a first artificial magnetic conductor unit array and a second artificial magnetic conductor unit array. The defect ground includes a square annular groove obtained by etching the metal floor. The two different artificial magnetic conductor units of the microstrip antenna can satisfy a phase difference of180 degrees +/-30 degrees in a wide frequency band, thereby realizing a purpose of reducing the wideband radar scattering cross section of the antenna. Compared with an original antenna, the microstrip antenna is significantly increased in antenna gain. Due to the floor-etched defect ground structure, the reflection curve of the artificial magnetic conductor units in the vicinity of the antenna radiation patch shifts to the low frequency so as to reduce the radar cross section in a lower frequency band without changing the size of the artificial magnetic conductor unit and provide a new idea for miniaturization design.
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TL;DR: In this paper, a defected ground structure (DGS) was adopted to improve cross-polarization (XP) performance on a wideband microstrip antenna by adopting a DGS.
Abstract: In this paper, a new method of improving cross-polarization (XP) performance on a wideband microstrip antenna is proposed, by adopting a defected ground structure (DGS). This F-slot shaped defected ground structure (F-DGS) exhibits considerable improvement in terms of XP properties, broad boresight angular suppression, and impedance bandwidth (S11 < −10 dB). Lower than −26 dB XP level is achieved over 206◦ angular range, while the impedance bandwidth is broadened to 15.5%. Both wideband rectangular patches with and without F-DGS have been fabricated and experimented.
Cites background from "Rectangular microstrip patch with s..."
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References
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TL;DR: In this article, a defected ground structure (DGS) pattern is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna, which is simple and easy to etch on a commercial microstrip substrate.
Abstract: A defected ground structure (DGS) is proposed to reduce the cross-polarized (XP) radiation of a microstrip patch antenna. The proposed DGS pattern is simple and easy to etch on a commercial microstrip substrate. This will only reduce the XP radiation field without affecting the dominant mode input impedance and co-polarized radiation patterns of a conventional antenna. The new concept has been examined and verified experimentally for a particular DGS pattern employing a circular patch as the radiator. Both simulation and experimental results are presented.
239 citations
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TL;DR: In this paper, a defect ground structure (DGS)-integrated rectangular microstrip patch has been experimentally investigated with an aim to improve polarisation purity in radiated fields.
Abstract: Defected ground structure (DGS)-integrated rectangular microstrip patch has been experimentally investigated with an aim to improve polarisation purity in radiated fields. Width to length ratio (aspect ratio) of a patch attributes different characteristic features. Therefore present experimental studies have been executed for four different aspect ratio values like 1.6, 1.3, 1.0 and 0.8. Folded defects have been employed in H-plane. Possibility of achieving high polarisation purity (over 25 dB isolation between co- to cross-polarised fields) with improved impedance bandwidth has been demonstrated. The variation in XP fields as a function of the patch aspect ratio has been investigated and a strong physical insight into the modal fields with and without DGS has been developed.
65 citations
"Rectangular microstrip patch with s..." refers background or methods in this paper
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TL;DR: In this paper, a simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically, which will reduce the XP radiation field compared to a conventional micro-strip antenna without affecting its copolarised (CP) radiation characteristics.
Abstract: A simple rectangular microstrip antenna on slot-type defected ground plane is proposed for reduced cross-polarized (XP) radiation and justified theoretically. This will reduce the XP radiation field compared to a conventional microstrip antenna without affecting its copolarized (CP) radiation characteristics.
60 citations
"Rectangular microstrip patch with s..." refers methods in this paper
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TL;DR: In this paper, a hexagonal shape defected ground structure (DGS) implemented on two element triangular patch microstrip antenna array was used to improve the radiation performance of the antenna.
Abstract: This paper presents a hexagonal shape defected ground structure (DGS) implemented on two element triangular patch microstrip antenna array. The radiation performance of the antenna is characterized by varying the geometry and dimension of the DGS and also by locating the DGS at specific position which were simulated. Simulation and measurement results have verified that the antenna with DGS had improved the antenna without DGS. Measurement results of the hexagonal DGS have axial ratio bandwidth enhancement of 10 MHz, return loss improvement of 35%, mutual coupling reduction of 3 dB and gain enhancement of 1 dB.
58 citations
"Rectangular microstrip patch with s..." refers background in this paper
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TL;DR: In this article, a symmetric and nonproximal defected ground structure has been proposed for a square microstrip patch to achieve high co-to-cross-polarized isolation over the principal radiation planes.
Abstract: A symmetric as well as nonproximal defected ground structure has been conceived for a square microstrip patch to achieve high co- to cross-polarized (XP) isolation over the principal radiation planes. This design does not follow the thumb rule of earlier works where the defect was deployed either underneath or in close proximity to the patch boundary. The proposed configuration, therefore, appears to be ideal for some specific applications, such as dual-polarized or circularly polarized patches with improved polarization purity. A representative design in C-band has been discussed, leading to the proof of concept. Experimental verification confirms up to 8–10 dB improvement in XP level, particularly in the H-plane.
24 citations
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