Kai chang due to the recent interest in broadband antennas a microstrip patch antenna was developed to meet the need for a cheap, low profile, broadband antenna. A few technique have been introduce to obtain dual polarized antenna such as aperturecoupled microstrip antenna, two port corporate feed network and two or more probe feeds technique. Using simulation and practical investigation, the coupling between the microstrip feed line and aperture, along with the coupling between the aperture and patch, is investigated and. Compact wideband dualpolarized microstrip patch antenna k.
Highisolation dualpolarized microstrip antenna via substrate. The basics of patch antennas, updated orban microwave. Novel aperturecoupled microstripline feed for circularly. The oam radio beams are generated by employing a fourelement antenna array with specific excitation. The wellknown aperture coupled antenna first proposed and demonstrated by pozar 1, has been developed into a variety of dual polarization slot coupled patch antennas reported in 25. The assembled package consists of a 2layer lid substrate, a 2layer frame, and a 14layer base substrate. Furthermore, the proposed antenna is stacked using an upper circular patch thus achieving a dualband circularly polarized pattern. Dualpolarized aperturecoupled wideband microstrip patch. An intuitive tutorial of antennas and antenna theory. Dual polarization stacked microstrip patch antenna array. Dualband stacked circularly polarized microstrip antenna. The small size antenna is achieved by using the aperture coupled structure. Simulations and tests shows that the antenna is circular polarized and have a.
Keywords aperture coupled microstrip antenna, back radiation reduction, circularly polarized microstrip antenna, crossslot coupled, microstrip antenna with resonant slots. Circularly polarized aperture coupled microstrip antenna. Design of striplinefed dualpolarization aperturecoupled stacked microstrip patch phased array antenna for wideband application. Kai chang recent days, antennas play an important role in wireless communication system. This website is designed to present a comprehensive overview of antennas, from design, to measurement and theory. A lowprofile dualpolarized microstrip antenna array for. Chapter 2 presents the basic theory of mpas, including the basic structures, feeding techniques. Dual polarized wideband aperture stacked patch antennas. Nikmehr, a dual band dual polarized microstrip array antenna for base stations, progress in electromagnetics. A generally planar antenna for generating circularly polarized electromagnetic signals, particularly useful at microwave frequencies. Dualpolarized slotcoupled antenna with a better isolation can be obtained by using multiple coupling slots, as the multifeed technique is capable of suppressing higherorder modes.
Moreover, an aperture coupled feed yields better gain and radiation pattern for a dualpolarized antenna aimed for wireless applications 712. The patch antenna is designed to operate simultaneously at around 30 and 20 ghz, the up and downlink frequencies of modern kaband satellite communication systems. Air gap aperture coupled stacked patch antenna for dualband. Design of dualfeed dualpolarized microstrip antenna with high isolation and low cross polarization by k. Ill use the terms microstrip antenna and patch antenna interchangeably.
A dual polarized aperture coupled circular patch antenna using a. Investigation of the equivalent circuit parameters and. A broadband fourfeed circular patch antenna is demonstrated to generate highpurity dualmode vortex beams carrying orbital angular momentum oam for the first time. Dualpolarized aperturecoupled patch antennas with application to retrodirective and monopulse arrays. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. Pdf an aperturecoupled dualpolarized wideband microstrip antenna with high porttoport isolation in cband is presented in this paper. Development and optimization of the aperturecoupled stacked microstrip patch antenna is presented, which has dual polarization with great enhancement of bandwidth. The antenna consists of a cushaped slottedpatch radiator with an aperture coupled feeding system. Wideband dualpolarized slotcoupled microstrip array for. It was decided to design a patch antenna from the theoretical study since it fulfils all the requirements for the antenna. The paper presents the design of a dualpolarized aperturecoupled microstrip patch antenna suitable for passive 5. This website is intended to be a source of knowledge for learning about and understanding antennas.
These minima and maxima continuously change side like the phase of the rf signal. Pdf aperture coupled antenna for wireless communication. In this communication, a dualpolarized aperturecoupled microstrip patch antenna with a broadbandwidth highisolation low crosspolarization. Pdf dualpolarized aperturecoupled wideband microstrip patch. Dualpolarized aperturecoupled patch antennas with application. A wideband highgain dualpolarized slot array patch. A dualband circularly polarized aperturecoupled stacked.
Dualband circularly polarized aperturecoupled microstrip antenna 1619 fig. The analysis of an aperturecoupled microstrip antenna acmsa based on the cavity model theory is presented in this paper. Introduction bandwidth enhancement by multiple resonances is a widely used technique for microstrip patch antennas. A multilayer organic package with 64 dualpolarized. The circular polarization diversity with the square patch microstrip antenna was obtained by the implantation of the quadrature hybrid as a microstrip feed line. A broadband dualfeed dualpolarized microstrip antenna with low cross polarization and high isolation is presented. And the proposed antenna has smaller size than two single polarized antenna. The simulated and measured parameters of the proposed antenna are shown in figure 8. Development and optimization of the aperture coupled stacked microstrip patch antenna is presented, which has dual polarization with great enhancement of bandwidth. The wide impedance and axial ratio bandwidths are achieved by the proposed feeding mechanism, which entails the use of a circular.
Stacked antenna with aperture feeding mechanism results in great isolation between two feeds. Air gap aperture coupled stacked patch antenna for dualband rajesh kumar vishwakarma 1, sanjay tiwari 2 1department of ece, juet, raghogarh, guna 2school of studies in electronics, pt. Each antenna element comprises a single excitation aperture 7 cut in a planar conductive ground plane 9. This article presents the design of four different circularly polarized, aperturecoupled patch antennas with switchable polarization sense. Dual band and dual polarized microstrip patch antenna. Stuchly department of electrical and computer engineering university of victoria, victoria, b. A dual polarized dual mode orbital angular momentum oam microstrip antenna array is presented. For broad bandwidth and easy integration with active circuits, it uses the aperture coupled stacked patches. Seriesfed aperturecoupled microstrip antennas and arrays. The enhanced bandwidth is achieved by using a stacked patch configuration and dumbbell shaped slots. 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. Unnecessarily complicated math is avoided throughout. In this contribution a dualband, dualpolarized microstrip antenna element for array applications is presented.
The aperture coupled microstrip antenna was developed by using cross slot aperture at the plane between feed line plane and ground plane. A singlefeed miniaturized circularly polarized patch antenna has been proposed and studied in this paper. A broadband dualpolarized microstrip patch antenna with aperture. Rather than the conventional placement strategy of shorting pins, four lshaped shorting strips are coupled to the patch radiator that not only contribute to the size reduction but also provide capability for broader band operation. Compact wideband dualpolarized microstrip patch antenna. Design of circular polarized dual band patch antenna. Dualpolarized slotcoupled planar antenna with wide. A novel slottedpatch antenna is proposed for dualband circularly polarized radiation using an aperture coupled feed.
Us4847625a wideband, aperturecoupled microstrip antenna. This communication presents a simplified approach to the design of a single feed dual polarised, dual frequency 1. Many efforts have been made on the dual polarization slot coupled patch antennas to achieve sufficient bandwidth, low back radiation, low levels. An exploded view of the dualpolarized microstrip antenna and a simplified equivalent circuit model for an aperture coupled microstrip antenna are shown in figure 1. Pdf a dual polarized aperture coupled circular patch antenna. For verification, a dual polarized patch antenna is implemented and its fabrication prototype is shown in figure 7.
Varying several physical parameters of aperture and matching feed line lengths had very large effect on the performance of the antenna. The first aperture coupled microstrip antenna was fabricated and tested by a graduate student, allen buck, on august 1, 1984, in the university of massachusetts antenna lab. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. Wideband dual linearly polarized radiating element geometry of the dual linearly polarized elementlpl is shown in fig.
Wideband dual linearly polarized patch array antenna. Pier letters online design of dualfeed dualpolarized. A new design for a dual polarized aperture coupled patch antenna is presented. Three antennas are dual polarized and use a 3 db hybrid as the polarizer in the feed network. They are the original type of microstrip antenna described by howell in 1972. Highisolation dualpolarized microstrip antenna via. A wideband dualpolarized stacked microstrip patch antenna. Design of a dualpolarized microstrip patch antenna with excellent. The authors of reference 144 propose a multilayer aperturecoupled patch antenna that can be used for dualpolarization operation at c and xbands. Using simulation and practical investigation, the coupling between the microstrip feed line and aperture, along with the coupling between the aperture and patch, is investigated. Miniaturized circularly polarized patch antenna using. The theoretical analysis is based on the finitedifference timedomain fdtd method. Miniaturized wideband aperture coupled microstrip patch antenna. Generation of broadband highpurity dualmode oam beams.
A dualpolarization aperture coupled stacked microstrip. The quasicrossshaped aperture is excited by a ushaped and an mshaped microstrip. In this communication, a dual polarized aperture coupled microstrip patch antenna with a broadbandwidth highisolation low crosspolarization levels, and lowbackward radiation levels is designed and its features are presented. The dual polarized antenna yields a bandwidth of 20. This paper presents a simplified approach to the design of a single feed dual polarised, dual frequency 1. A wideband, dual polarized printed antenna is designed and developed in this paper. Dual and circularly polarized aperture coupled microstrip antennas. Novel aperturecoupled 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. Geometry of the aperturecoupled stackedpatch microstrip gps antenna. Circularly polarized, aperturecoupled patch antennas for. The array antenna offers an impedance bandwidth vswr. The printed antenna has a measured 10 db return loss bandwidth of 52% and an isolation between the excitation ports of greater than 39 db over. The rectangular patch antenna is analyzed, and what is learned here will be applied to understanding pifas planar invertedf antennas. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface.
Firstly, based on cavitymodel theory, the antiphase tech niques contribution. Dual linearly polarized microstrip array antenna intechopen. Spaced apart from the ground plane 9 by means of a dielectric layer 11 and covering the excitation aperture 7 is a planar conductive. Each antenna element is an aperture coupled microstrip patch antenna with a low profile of 0.
The measured isolation between two polarization ports is better than 35 db and the measured. Microstrip antenna an overview sciencedirect topics. The antennas main differences are in the feed network, slot aperture shape and radiating patch. This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. A broadband dualpolarized microstrip patch antenna with. Crosssection view of dual polarization probefed microstrip stacked patch antenna element. The antenna is based upon an aperture stacked patch layout and incorporates a simple duallayered feeding technique to achieve dualpolarized radiation. Aperture coupled antennas ieee conferences, publications. The wellknown aperturecoupled antenna first proposed and demonstrated by pozar 1, has been developed into a variety of dualpolarization slotcoupled patch antennas reported in 25. Many efforts have been made on the dualpolarization slotcoupled patch antennas to achieve sufficient bandwidth, low back radiation, low levels. As the author said, the patch antenna is orthogonally fed by two cpws, the antenna can work at 2. High isolation dualpolarized patch antenna with hybrid.
Each feed line is placed in different layers for an array structure. Cross section of a patch antenna in its basic form a half wave long patch operates in what we call the fundamental mode. This paper presents air gap aperture coupled microstrip antenna for dualband operation over the frequency range of 2. Design of dual band dual polarized microstrip patch antennas core. Varying several physical parameters of aperture and matching feed line lengths had very large effect on the. An antenna can be made to have a choice of two polarizations, or have two polarizations available simultaneously. In this section, well discuss the microstrip antenna, which is also commonly referred to as the patch antenna. The theoretical analysis is based on the finite element method fem. The cushaped slot is embedded on the square patch for dualband and dualsense circularly polarized radiation. Analysis of aperture coupled microstrip antenna with. Wideband duallinear polarized microstrip patch antenna. Nikmehr, a dualband dualpolarized microstrip array antenna for base stations, progress in electromagnetics. Recently i read a dual polarized antenna and have some questions to ask, the structure of the antenna is as follows.
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