Ashish bagwari published on 20190715 download full article with reference data and citations. An aperture coupled design is proposed for microstrip slot antenna to improve its radiation pattern as well as bandwidth. Analysis of an aperture coupled microstrip patch antenna. Bandwidth optimization of aperturecoupled stacked patch antenna. In order to provide the required bandwidth efficiency of the antenna work and bandwidth optimization of aperturecoupled stacked patch antenna. Jan 17, 2007 a low profile multiband ushaped aperture coupled microstrip antenna with a coil in this article, an lshaped probefed, uslot patch antenna with a coil element is studied. Seriesfed aperture coupled microstrip antennas and arrays by bojana zivanovic a dissertation submitted in partial fulfillment of the requirements for the degree of doctor of philosophy department of electrical engineering college of engineering university of south florida major professor. Pdf a wideband circular polarization stacked patch antenna.
Analysis of an aperture coupled microstrip patch antenna with. The aperture coupled microstrip antenna1has several advantages over transmission line. The results from both techniques are in good agreement with experimentally obtained data. The proposed antenna has a circular patch with two diametrically opposite notches which are intended to improve the ar. The dual patch aperture coupled microstrip antenna can fulfill all these criteria unlike other printed radiators. In order to provide the required bandwidth efficiency of the antenna work and bandwidth optimization of aperture coupled stacked patch antenna. An aperture coupled microstrip patch antenna for application.
The aperture coupled patch antenna was the selected geometry to reduce the radiation from the feed network that. We have explored the development of a high gain circularly polarised aperture coupled microstrip patch antenna at xband. The first aperture coupled microstrip antenna was introduced in 1985 by d m pozar 4 figure1. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. A patch antenna with a parasitic patch is sometimes known as an electromagnetically coupled patch antenna. Characteristics of aperture coupled microstrip antennas on. A wideband highgain dualpolarized slot array patch antenna. A slot coupled cpw fed patch antenna is analyzed using two different techniques. New feed configuration for microstrip antennas has been proposed by pozar. Physics antennas electronics design and construction engineering design methods.
High gain fss aperture coupled microstrip patch antenna niaz muhammad1, hassan umair1,zainulislam1, 2, zar khitab1,imranrashid1, and farooq a. Improved coupling for aperture coupled microstrip antennas. Aperture coupled feedingslot coupled feeding substrate material. Aperture coupled rectangular microstrip patch antenna for. A new microstrip dualband polarization reconfigurable antenna is presented for wlans operating at 2. Jul 15, 2019 an aperture coupled microstrip patch antenna for application at 7. This paper presents a linear polarized aperture coupled inverted uslot patch antenna with small steps at the edges. On the use of slots in the design of patch antennas. The aperture coupled microstrip patch antenna was proposed in pozar 1985 to alleviate the difficulties of feeding printed antennas operating at millimeter wave frequencies. Wideband circularly polarized aperturecoupled microstrip antennas. Aperture coupled rectangular microstrip patch antenna for s.
Novel aperture coupled microstripline feed for circularly polarized patch antenna hau wah lai, ka ming mak, and ka fai chan abstracta wideband circularly polarized patch antenna is proposed. Seriesfed aperturecoupled microstrip antennas and arrays. Millimeter wave printed antennas can take on many forms, including microstrip patch elements and a variety of proximity coupled printed radiators. The microstriplinefed printed slot and the aperture coupled patch are examples of the latter type and may be useful in certain planar array applications. The addition of a thick ground plane to the aperture coupled patch antenna, proposed as a heat sink. The tuning stub is used to tune the excess reactance of the slot coupled antenna. This paper presents air gap aperture coupled microstrip antenna for dualband operation over the frequency range of 2. An aperture coupled microstrip patch antenna is proposed for xband applications in this paper. The first aperture coupled microstrip antenna was introduced in 1985 by d m pozar 4. Hfsss microstrip patch antenna design part1basics of antenna design using hfss software duration. A low profile multiband ushaped aperturecoupled microstrip. References 1 garg r, bhartia p, bahl i and ittipiboon a, microstrip antenna hand book artech house, boston 2001.
The radiating microstrip patch element is printed on the top of the substrate. A shapedbeam seriesfed aperturecoupled stacked patch array. The wide impedance and axial ratio bandwidths are achieved by the proposed feeding mechanism, which entails the use of a circular. The dualband achieved by variation of air gap 2 mm to 6 mm between single patch antenna and aperture coupled microstrip antenna. Aperture coupled stacked patch antenna for dual band. Miniaturized wideband aperture coupled microstrip patch. Dualband circularly polarized aperturecoupled microstrip antenna 1619 fig. It has many advantages such that it is used in monolithic phased arrays. Analysis of an aperture coupled microstrip antenna ieee xplore. Geometry of the aperture coupled stacked patch microstrip gps antenna. History of aperturecoupled microstrip patch antenna aperture coupled microstrip patch antennas have become a viable option for wireless and telecommunication systems over traditional microstrip patch antennas. The aperture is usually centered with respect to the patch where the patch has its maximum magnetic field. The wider patch results the lower resonant resistance. A microstrip antenna on one substrate is coupled through an electrically small aperture to a microstrip feed line on a perpendicularly oriented substrate.
Optimization of aperture coupled microstrip patch antennas. Aperture coupled antenna is a particular antenna with high gain and wide bandwidth. Pdf an introduction of aperture coupled microstrip slot antenna. Since its introduction in 1985 1, the features offered by this antenna element have proved to be useful in a wide variety of applications, and the versatility. A dualband circularly polarized aperturecoupled stacked. Such a geometry allows two separate substrates to be used for the antenna and feed functions. The antenna proposed in this paper an axial ratio of less than 3db and a vswr of less than 2. Geometry of the aperturecoupled stackedpatch microstrip gps antenna. This paper presents aperture coupled stacked patch antenna using air gap variation. Design and implementation of aperture coupled microstrip iff. This geometry has subsequently been analyzed by a number of researchers using various techniques and models. Transmission line model of dual patch aperture coupled.
Research and development in the 1980s contributed to the discovery of the aperturecoupled microstrip patch antenna 2. It is based on coupling of an aperture between the patch antenna and microstrip slot line. To reduce back radiation, metallic rods or resonance planes are used in the back of the antenna or appropriate cavities are put next to the coupling aperture 58. Analysis of an aperture coupled microstrip antenna. A new technique is described for feeding printed antennas. An aperturecoupled design is proposed for microstrip slot antenna to improve its radiation pattern as well as bandwidth. Aperture coupled microstrip antenna couples the patch antenna with microstripline through an aperture 1. The variation of air gap 2mm to 6mm has been done between single patch antenna and an aperture coupled antenna.
In order to achieve the desired performances of wimax antenna, an aperture coupled feed is used because of its good characteristics such as wide operational bandwidth and shielding of the radiation patches. A shapedbeam seriesfed aperture coupled stacked patch array antenna. There is a coupling aperture present on the ground plane, usually centered under the patch. Dualband circularly polarized aperture coupled microstrip antenna 1619 fig. Coupling effects of aperture coupled microstrip antenna. The aperture coupled microstrip antenna first proposed by pozar 2 in 1985 has a number of advantages over other feeding method involving galvanic contact between the antenna and feed line. The ground plane consists of an ishape coupling slot and is loaded under the radiating patch element. Pdf lowprofile aperturecoupled patch antenna array for. Novel aperturecoupled microstripline feed for circularly. The first aperture coupled microstrip antenna was introduced in 1985 by d m pozar 7. Pdf aperture coupled stacked patch antenna for dual band. Aperture coupled antenna is a particular antenna with. Pozar, microstrip antenna aperture coupled to a microstripline, electronics letters, vol.
Air gap aperture coupled stacked patch antenna for dualband. A wideband cornerstruncated rectangular stacked patch antenna for use in the circular polarization applications was proposed. Planar microstrip antenna can be built with the theoretically infinite number of layers. Microstrip antenna an overview sciencedirect topics. At the lower frequency band, the antenna exhibits a 2. The hshaped aperture is used to improve the resonant. History, operation, development, and applications by. The side view of the air gap aperture coupled microstrip antenna is shown in. High gain cp aperturecoupled antenna for xband application. Us4847625a wideband, aperturecoupled microstrip antenna. Aperture coupled microstrip patch antenna for wifi, wimax. Wideband aperturecoupled stacked patch antenna using thick. An aperture coupled stacked patch microstrip antenna is presented which is capable of operating over a bandwidth in excess of 50%.
Aperture coupling is an indirect method of feeding the patch. Microstrip patch antennas can be excited by different types of feeds. The proposed antenna consists of two substrates which are bonded using a prepreg in order to maintain stable construction. Geometry of the basic aperture coupled microstrip antenna. The experiment was performed at nasa lewis research center later renamed glenn research center by my ms student j. The first aperture coupled microstrip antenna was introduced in 1985 by d m pozar. Design and optimization of aperture coupled microstrip patch. Bhatti1 abstractthis paper presents a highgain cavity resonant antenna cra, consisting of an fss layer placed above an aperture coupled microstrip patch antenna acmpa. Multilayer aperture coupled antenna design as reported above, in typical aperture coupled patch antenna configurations, the ground plane is sandwiched in between the radiating element and the feedline. Design of wideband circularly polarized aperturecoupled microstrip. This design has wide bandwidth, good return loss, vswr, and radiation characteristics by. Analysis of a slot coupled coplanar waveguide fed patch antenna. The radiating patch length lp determines the resonant frequency of the antenna and the width wp a.
Aperture coupled stacked patch microstrip antenna can improve bandwidth more than 50 percent at the expense of increasing in back lobe radiation level. Bandwidth optimization of aperturecoupled stacked patch. This solution, unfortunately, leads to a reduction in antenna efficiency and leads to excitation of surface waves. The theoretical analysis is based on the finite element method fem. The authors of reference 144 propose a multilayer aperture coupled patch antenna that can be used for dualpolarization operation at c and xbands. A multifunctional aperture coupled stacked patch antenna is presented that operates at dual frequency bands. Dualpolarized aperturecoupled wideband microstrip patch. The aperture coupled microstrip antenna first proposed by pozar 2 in 1985 has a number of advantages over other feeding method involving galvanic contact. Section 2 presents a design approach for aperture coupled rectangular patch antenna, section 3 gives a brief about genetic algorithm and the flowchart used, in section 4 simulation results are presented and finally in section 5 conclusion is drawn. The lshaped probe feed is used to enhance the impedance matching, which is necessary because of a low radiation resistance in the usable band. A wideband, aperturecoupled microstrip antenna comprising a multilayer structure and including a feed layer, a ground plane including an aperture therethrough, a plurality of tuning layers formed of dielectric material, at least one of the tuning layers including therein a tuning element in the form of an electricallyconductive material, herein called a tuning patch, and final radiating. The feed and a rectangular patch antenna are shown in fig.
Aperture coupled antenna is a particular antenna with high gain and wide. Antenna performance is very sensitive to the variations of stub length. The feed line creates an electric field in the aperture, which induces surface currents on the patch. Nominal antenna circuit model parameters are determined. Pozar, microstrip antenna aperturecoupled to a microstripline. This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. An introduction of aperture coupled microstrip slot antenna. The proposed design exhibits wideband behavior, acceptable return loss, vswr, gain, small size, and less complexity. From the experimental results, the proposed antenna can be used as a unit radiator joined.
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