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Journal ArticleDOI

Simultaneous Compensation of Microstrip Feed and Patch by Defected Ground Structure for Reduced Cross-Polarized Radiation

10 Sep 2018-IEEE Transactions on Antennas and Propagation (Institute of Electrical and Electronics Engineers (IEEE))-Vol. 66, Iss: 12, pp 7348-7352
TL;DR: In this paper, the authors proposed a new idea of compensating spurious radiations usually occurring from the sharp transitions at patch to feed and feed to impedance transformer junctions which result in added cross-polarized (XP) fields in planar microstrip-fed patches.
Abstract: This communication proposes a new idea of compensating spurious radiations usually occurring from the sharp transitions at patch to feed and feed to impedance transformer junctions which result in added cross-polarized (XP) fields in planar microstrip-fed patches A strategic design and deployment of defected ground structure (DGS) have been explored successfully as a potential means to resolve such long-standing radiation issues The quantum of radiations from the feed has been theoretically estimated These along with the main source of XP fields (higher order mode) have been addressed by introducing a composite type of DGS The experimental validation executed at the C-band establishes this simple low-cost solution with a promise of 10 to 14 dB improvement in the H-plane XP fields It is also ensured that the proposed technique is equally useful in realizing dual-fed dual-polarized configurations without affecting the primary radiation and antenna performance
Citations
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Journal ArticleDOI
TL;DR: In this article, a compact, high gain, directive, and superstrate configuration-based metasurface (MS) antenna has been designed, which incorporates a fractal-shaped slotted patch having a periodic arrangement of square patches along with a shorting via at its center and a couple of rectangular slots in the ground plane.
Abstract: In this paper, a novel, compact, high-gain, directive, and superstrate configuration-based metasurface (MS) antenna has been designed, which incorporates a fractal-shaped slotted patch having a periodic arrangement of square patches along with a shorting via at its center and a couple of rectangular slots in the ground plane. The MS is designed over the FR4 dielectric by introducing a periodic arrangement of unit cells in which the unit cell is structured by a C-type patterned patch in the center surrounded by a couple of L-type-shaped patches. The MS is separated by a layer of Teflon from the conventional patch antenna designed over the FR4 dielectric, thereby acting as a superstrate. The proposed antenna provides good impedance matching across the frequency region of 10.14–10.94 GHz with a unidirectional radiation pattern. A fractional bandwidth of 7.6% and a maximum return loss of 24 dB have been realized at 10.44 GHz. The measured realized gain of 7.57 dBi was obtained at the same operating frequency. As the proposed antenna is more efficient, it can be promoted for $X$ -band operations, such as satellite communication, defense purpose, and medical supervision.

64 citations

Journal ArticleDOI
TL;DR: In this paper, an improved tuning of defected ground structure geometries for circular patch with twofold objective: to minimize the defect size by strategic shaping and deployment and, at the same time, to maintain the highest order of achievable suppression of cross-polarized (XP) radiations.
Abstract: This letter explores improved tuning of defected ground structure (DGS) geometries for circular patch with twofold objective: to minimize the defect size by strategic shaping and deployment and, at the same time, to maintain the highest order of achievable suppression of cross-polarized (XP) radiations. Relative merits and demerits of the earlier designs have been accounted for, to justify the need of further comprehensive improvement. The DGS dimensions in several cases appear as a limiting factor, especially in arrays. This letter resolves the same and reduces the size by at least 35%. Asymmetrically configured designs have been emphasized with a view to addressing the asymmetry in modal fields. They are examined in X -band and experimentally verified with a promise to achieve 16–18 dB XP suppression over H -plane, which, to the best of authors’ knowledge, is the maximum reported suppression so far.

23 citations


Cites background from "Simultaneous Compensation of Micros..."

  • ...Continuous developments have resulted in new design methodologies [12], [13]....

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Journal ArticleDOI
10 Jun 2019-Sensors
TL;DR: The proposed defected ground-structured antenna with a stub-slot configuration shows a stable radiation pattern and high realized gain with wide impedance bandwidth using the EBG structure, which are necessary for the requirements of IoT applications offered by 5G technology.
Abstract: In this paper, a defected ground-structured antenna with a stub-slot configuration is proposed for future 5G wireless applications. A simple stub-slot configuration is used in the patch antenna to get the dual band frequency response in the 5G mid-band and the upper unlicensed frequency region. Further, a 2-D double period Electronic band gap (EBG) structure has been implemented as a defect in the metallic ground plane to get a wider impedance bandwidth. The size of the slots and their positions are optimized to get a considerably high impedance bandwidth of 12.49% and 4.49% at a passband frequency of 3.532 GHz and 6.835 GHz, respectively. The simulated and measured realized gain and reflection coefficients are in good agreement for both operating bandwidths. The overall antenna structure size is 33.5 mm × 33.5 mm. The antenna is fabricated and compared with experimental results. The proposed antenna shows a stable radiation pattern and high realized gain with wide impedance bandwidth using the EBG structure, which are necessary for the requirements of IoT applications offered by 5G technology.

22 citations


Cites background from "Simultaneous Compensation of Micros..."

  • ...Whereas the proximal position of a composite type of DGS structure leading to a reduction of XP and also a reduction in the back radiation was achieved in [7]....

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Journal ArticleDOI
TL;DR: In this article, the magnetic wall across each nonradiating edge has been transformed into a composite boundary and unlike the earlier designs, this mechanism has been successfully demonstrated in eliminating the cross-polarized (XP) fields without causing any harm to the primary resonance.
Abstract: Discrimination of a higher order TM02 mode in a rectangular patch by minimally tampering its boundary condition has been addressed based on some insightful studies. The magnetic wall across each nonradiating edge has been transformed into a composite boundary and unlike the earlier designs, this mechanism has been successfully demonstrated in eliminating the cross-polarized (XP) fields without causing any harm to the primary resonance. The signature of modal discrimination has been experimentally evidenced in the $X$ -band by reducing the H-plane XP level consistently over the full range of elevation angle varying over 15–18 dB. Such “full-elevation” feature is highly significant from practical aspect and not commonly achievable in the other known methods. The proposed technique is directly integratable with a practical system without imposing any constraint on its deployment platform.

18 citations


Cites background from "Simultaneous Compensation of Micros..."

  • ...3016506 improvement in XP reduction [12]–[19], but they need extra...

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  • ...measure in mounting the antenna for avoiding backward leakage through the ground plane defects [19]....

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Journal ArticleDOI
TL;DR: In this paper, three miniaturization techniques were combined to achieve compact size while maintaining optimal performances of a dual-band star shape slotted Microstrip Patch Antenna (MPA) operating at 2.4 and 5 GHz resonant frequencies.
Abstract: Three miniaturization techniques were combined in this work to achieve compact size while maintaining optimal performances of a dual-band star shape slotted Microstrip Patch Antenna (MPA) operating at 2.4 and 5 GHz resonant frequencies. High permittivity substrate and slot techniques were used for miniaturization and impedance matching improvement, while DGS technique was necessary for bandwidth enhancement and further miniaturization of the reference MPA. The miniaturized antenna shows a planar structure and occupies a very small area of 15.55× 19.80 mm2 achieving patch size area reduction of 71.24% and overall size reduction of 75.42%. Respectable positive gains were maintained with radiation efficiency exceeding 83% and 68% at 2.4 GHz and 5GHz, respectively. The reference and miniaturized MPAs were fabricated, then their performances were measured and compared to the simulated ones. The measured impedance bandwidths of the miniaturized MPA were around 38% and 13% at the two resonant frequencies, respectively, which confirm the originality and suitability of the miniaturized MPA for Wireless Local Area Network WLAN and ISM applications.

12 citations


Cites background from "Simultaneous Compensation of Micros..."

  • ...It is the reason that DGS technique has become one of the most interesting ways to overcome the limitation of a compact antenna, in terms of gain [8], Cross-Polarized Radiation [9, 10], and impedance bandwidth [11, 12]....

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References
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Book
31 Oct 2000
TL;DR: Feeding Techniques and Modeling, Design and Analysis of Microstrip Antenna Arrays: Parallel and Series Feed Systems, and Theory and Design of Active Integrated Micro Strip Antenna Amplifiers.
Abstract: Microstrip Radiators: Various Microstrip Antenna Configurations. Feeding Techniques and Modeling. Applications. Radiation Field. Surface Waves and Photonic Band-Gap Structures. Analytical Models for Microstrip Antennas: Transmission Line Model. Cavity Model. Generalized Cavity Model. Multi-port Network Model (MNM). Radiation Fields. Aperture Admittance. Mutual Admittance. Model for Coaxial Probe in Microstrip Antennas. Comparison of Analytical Models. Full-Wave Analysis of Microstrip Antennas: Spectral Domain Full-Wave Analysis. Mixed-Potential Integral Equation Analysis. Finite-Difference Time Domain Analysis.Rectangular Microstrip Antenna: Models for Rectangular Patch Antenna. Design Considerations for Rectangular Patch Antennas. Tolerance Analysis of Rectangular Microstrip Antennas. Mechanical Tuning of Patch Antennas. Quarter-wave Rectangular Patch Antenna. Circular Disk and Ring Antennas: Analysis of a Circular Disk Microstrip Antenna. Design Considerations for Circular Disk Antennas. Semicircular Disk and Circular Sector Microstrip Antennas. Comparison Of Rectangular And Circular Disk Microstrip Antennas. Circular Ring or Annular Ring Microstrip Antenna. Circular Sector Microstrip Ring Antenna. Microstrip Ring Antennas of Non-Circular Shapes. Dipoles and Triangular Patch Antennas: Microstrip Dipole and Center-Fed Dipoles. Triangular Microstrip Patch Antenna. Design of an Equilateral Triangular Patch Antenna. Microstrip Slot Antennas: Microstrip-Fed Rectangular Slot Antennas. CPW-Fed Slot Antennas. Annular Slot Antennas. Tapered Slot Antennas (TSA). Comparison of Slot Antennas with Microstrip Antennas. Circularly Polarized Microstrip Antennas and Techniques: Various Types of Circularly Polarized Microstrip Antennas. Singly-Fed Circularly Polarized Microstrip Antennas. Dual-Orthagonal Feed Circularly Polarized Microstrip Antennas. Circularly Polarized Traveling-Wave Microstrip-Line Arrays. Bandwidth Enhancement Techniques. Sequentially Rotated Arrays. Broad-Banding of Microstrip Antennas: Effect of Substrate Parameters on Bandwidth. Selection of Suitable Patch Shape. Selection of Suitable Feeding Technique. Multi-Moding Techniques. Other Broadbanding Techniques. Multifrequency Operation. Loaded Microstrip Antennas and Applications: Polarization Diversity Using Microstrip Antennas. Frequency Agile Microstrip Antennas. Radiation Pattern Control of Microstrip Antennas. Loading Effect of a Short. Compact Patch Antennas. Planar Inverted F Antenna. Dual-Frequency Microstrip Antennas. Dual-Frequency Compact Microstrip Antennas. Active Integrated Microstrip Antennas: Classification of Active Integrated Microstrip Antennas. Theory and Design of Active Integrated Microstrip Antenna Oscillators. Theory and Design of Active Integrated Microstrip Antenna Amplifiers. Frequency Conversion Active Integrated Microstrip Antenna Theory and Design. Design and Analysis of Microstrip Antenna Arrays: Parallel and Series Feed Systems. Mutual Coupling. Design of Linear Arrays. Design of Planar Arrays. Monolithic Integrated Phased Arrays.

3,612 citations


"Simultaneous Compensation of Micros..." refers background in this paper

  • ...Microstrip line-fed patch antenna (MSPA) [1], [2] is a natural choice due to its advantage of easy integration with transmitting/ receiving circuits using a common substrate....

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  • ...They indeed cause spurious radiations resulting in degradation of the XP isolation [2]–[6]....

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Book
01 Jan 1989
TL;DR: Analysis and design of circular microstrip elements micro Strip patch antennas circular polarization and bandwidth electromagnetically coupled dipoles multilayer configurations large bandwidth hybrid flat dipoles and arrays numerical analysis of microstrip patch antennas segmentation and desegmentation methods for microstrip antenna design transmission line model.
Abstract: Analysis and design of circular microstrip elements microstrip patch antennas circular polarization and bandwidth electromagnetically coupled dipoles multilayer configurations large bandwidth hybrid flat dipoles and arrays numerical analysis of microstrip patch antennas segmentation and desegmentation methods for microstrip antenna design transmission line model of microstrip antennas design and technology of low cost printed antennas analysis and design considerations of printed array antennas circularly polarized array antennas microstrip antenna feeds advances in substrate technology special measurement techniques for printed antennas CAD of microstrip and triplate systems resonant microstrip antenna elements and arrays applications of microstrip antennas monolithic conical conformal microstrip tracking antenna extensions and variations of the microstrip antenna concept.

1,501 citations


"Simultaneous Compensation of Micros..." refers background in this paper

  • ...Microstrip line-fed patch antenna (MSPA) [1], [2] is a natural choice due to its advantage of easy integration with transmitting/ receiving circuits using a common substrate....

    [...]

  • ...I. INTRODUCTION Microstrip line-fed patch antenna (MSPA) [1], [2] is a natural choice due to its advantage of easy integration with transmitting/ receiving circuits using a common substrate....

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Journal ArticleDOI
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.

275 citations

Journal ArticleDOI
TL;DR: In this paper, a rigorous solution to the problem of a rectangular microstrip antenna fed by a microstripline is presented, where the currents on the feed line and the patch are expanded in a suitable set of modes, and a moment method solution is formulated in the spectral domain.
Abstract: A rigorous solution to the problem of a rectangular microstrip antenna fed by a microstripline is presented. The currents on the feed line and the patch are expanded in a suitable set of modes, and a moment method solution is formulated in the spectral domain. Three special feed cases are treated: a patch fed at a radiating edge; a patch fed at a nonradiating edge; and a proximity coupled patch. Good results are obtained for the radiating edge fed case and the proximity coupled case. The nonradiating edge fed case results were not as good; reasons for this discrepancy are discussed. Calculations are compared with measurements for high and low dielectric constant substrates.

141 citations

Journal ArticleDOI
01 Jun 1988
TL;DR: The use of coplanar corporate feeds for microstrip patch arrays leads to constructional simplicity, but also to performance degradations due to feed radiation, in addition to limitations due toFeed resistive loss, surface waves, mutual coupling and tolerances are quantified.
Abstract: The use of coplanar corporate feeds for microstrip patch arrays leads to constructional simplicity, but also to performance degradations due to feed radiation, in addition to limitations due to feed resistive loss, surface waves, mutual coupling and tolerances. These effects are quantified, and this allows specification of array performance limitations in addition to the recommendation of the use of smooth feed discontinuities, high line impedance, and thin substrates. Improvements due to the use of alternate feed geometries, such as sequentially rotated feeding and subarraying, are also quantified and are shown to be substantial.

135 citations


"Simultaneous Compensation of Micros..." refers background in this paper

  • ...Therefore, a variety of complex feed mechanisms were explored for resolving the XP issues and those were sequentially rotated balanced feeding and subarraying [8], usage of dual thickness substrate [9], and cavity backing [10], [11]....

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