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Proceedings ArticleDOI

Improvement in circularly polarized square patch design by double-layered ground structure

TL;DR: In this article, the authors proposed a stacked dual truncated corner square patch (SDP) configuration, which employs a single fed truncated CB square patch etched onto a substrate grounded with a patch shaped small GP and having second square shaped GP of standard size separated from the first one with an air gap at an optimized distance.
Abstract: Radiation performance of a circularly polarized (CP) truncated corner square patch on a conventional ground plane (GP) has been enhanced by using a simple and novel configuration of stacked dual GP. The proposed configuration employs a single fed truncated corner square patch etched onto a substrate grounded with a patch shaped small GP and having second square shaped GP of standard size separated from the first one with an air gap at an optimized distance. This configuration is ideal for many wireless and satellite communication applications. Simulated results indicate the best achievable axial ratio (AR) of about 0.4 dB for a stacked dual GP CP antenna compared to an AR of 2.7 dB for a conventional single GP CP antenna, indicating an improvement in cross polarized (XP) isolation of about 18 dB. AR bandwidth has also been improved by almost 100% with the stacked dual GP configuration when compared with conventional CP antenna. Improved radiation performance has been achieved without affecting impedance bandwidth and peak gain of the patch. Analysis based on GP size variation of the conventional CP antenna and stacked dual GP antenna reveals that stacked dual GP configuration results in compact CP antenna with good radiation performance.
Citations
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Proceedings ArticleDOI
01 Dec 2018
TL;DR: In this paper, a design of circularly polarized microstrip patch antenna loaded with slots and slits with a single feed is presented, which can be used at X and Ku band for satellite applications.
Abstract: This paper presents a design of circularly polarized microstrip patch antenna loaded with slots and slits with a single feed. Antenna1 consists of four slits at the edges, antenna 2 consists of cross slot at the center along with four slits at the edges and antenna 3 comprises of four slits at the edges, four slits at diagonal corners of patch along with a cross slot at the center. The feed location along the diagonal axis of the square patch allows to radiate circular polarization. It is noticed that resonance frequency and sense of circular polarization is largely dependent on the position and size of the slits placed on the radiating square patch. The proposed final antenna is having an axial ratio bandwidth of 4.35% and peak gain of 7.1 dBi with good radiation characteristics. The designed antenna can be used at X and Ku band for satellite applications.

2 citations


Cites background from "Improvement in circularly polarized..."

  • ...A square patch [11] with double layered ground structure is designed to enhance the circular polarization by almost 100%....

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Proceedings ArticleDOI
13 Nov 2020
TL;DR: In this article, the authors presented a wideband high-efficiency circularly polarized (CP) phased array antenna with low profile for Ka-band satellite, which introduces a common ground structure for both microstrip line and circular patch to reduce the profile and make the antenna easily integration.
Abstract: This paper presents a wideband high-efficiency circularly polarized (CP) phased array antenna with low profile for Ka-band satellite. The antenna introduces a common ground structure for both microstrip line and circular patch to reduce the profile and make the antenna easily integration. In addition, complementary metal grids and defective ground effectively reduce the coupling between units to improve the gain of the antenna. At the same time, the sequential rotation technique is applied in the antenna array to expand the axial ratio bandwidth. The profile of the antenna is 0.076λ 0 (λ 0 is the wavelength in free space). The impedance bandwidth for S 11 <-10 dB is 15.8%, and the AR is below to 3dB in the whole operating band. The radiation efficiency can reach more 90% over the whole band.
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


"Improvement in circularly polarized..." refers background or methods in this paper

  • ...Microstrip patch antennas (MPAs) radiating CP waves have been popular among many of the today’s wireless and satellite communication systems due to their simplicity and low profile nature in addition to its insensitivity to polarization tracking requirements [1]....

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  • ...Traditionally, CP waves are generated in MPAs either by making use of a single patch with proper excitation to obtain modes with equal amplitude and phase quadrature or by an array of patches with an appropriate feed arrangement [1][2]....

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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


"Improvement in circularly polarized..." refers background or methods in this paper

  • ...Traditionally, CP waves are generated in MPAs either by making use of a single patch with proper excitation to obtain modes with equal amplitude and phase quadrature or by an array of patches with an appropriate feed arrangement [1][2]....

    [...]

  • ...In principle, generation of CP waves in antenna requires excitation of two field components with equal amplitude and phase quadrature and among the various existing printed antennas, resonator type and travelling wave type are the ones fulfilling the requirements for generation of CP waves [2]....

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Journal ArticleDOI
TL;DR: In this article, three types of single-feed circularly polarized microstrip antennas, namely, a diagonal fed nearly square, a truncated-corners square and a square with a diagonal slot, are presented.
Abstract: Analysis and optimized designs are presented of three types of single feed circularly polarized microstrip antennas, namely, a diagonal fed nearly square, a truncated-corners square and a square with a diagonal slot. The Green's function approach and the desegmentation methods are used. The resonant frequencies are calculated for two orthogonal modes which together yield circular polarization. Optimum feed locations are determined for the best impedance match to a 50 \Omega coaxial feed line. Axial-ratio bandwidths, voltage standing-wave ratio (VSWR) bandwidths and radiation patterns are evaluated and verified experimentally.

602 citations


"Improvement in circularly polarized..." refers background in this paper

  • ...Single probe fed patch, which can generate CP radiation by perturbing the patch at appropriate locations with respect to feed, is a simple and economical choice for producing CP radiation in comparison with dual orthogonal feeds involving a power divider network [3]....

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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


"Improvement in circularly polarized..." refers methods in this paper

  • ...Defected ground structure (DGS) is yet another promising technique that has been so far employed for improving the XP performance of linearly polarized antennas as reported in [7][9] and also has been employed for a CP circular patch antenna as reported in [10] and CP square patch antenna as reported in [11]....

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Journal ArticleDOI
01 Oct 1989
TL;DR: In this paper, a first order analysis shows how the sequential technique significantly improves the axial ratio bandwidth in the relation to the number of patches in the array and the feeder connections.
Abstract: The technique of sequentially rotating the feed position of a microstrip patch antenna to improve the circular polarisation bandwidth of an array of such elements is briefly reviewed in the wider context of other known antenna parameter staggering concepts. A first order analysis then shows how the sequential technique significantly improves the axial ratio bandwidth in the relation to the number of patches in the array and the feeder connections. Unwanted effects such as feeder phase errors, multiple reflections in feeders, the presence of higher order modes and mutual coupling are then considered. Computations embracing these effects and measurements illustrate the various properties and topological options available. Finally, the application of the technique is briefly illustrated for a single patch and an array of patches. In conclusion the design principles are summarised and feeder effects are identified as the main limitation when implementing the sequential technique.< >

195 citations


"Improvement in circularly polarized..." refers background in this paper

  • ...Polarization purity of CP radiation has been taken care of by several researchers using various methods such as utilization of wide impedance bandwidth micro-strip element with four sequentially rotated feeds [4], sequentially rotated patch arrays [5], adding an air-gap layer between the radiating patch and ground plane [6] etc,....

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