Aperture coupling is an indirect method of feeding the patch. Therefore, it is difficult to arrange an antenna element at about half wavelength in the case of the abovepatch antenna. This paper presents air gap aperture coupled microstrip antenna for dual band operation over the frequency range of 2. It displayed only minor degradation of the lband patch arrays performance. The dual band antenna is fed through an aperture cut in the ground plane coupled to a 50. An important application for dual polarized antennas is base station antennas. Highisolation dualpolarized microstrip antenna via. The aperture coupled microstrip antenna was developed by using cross slot aperture at the plane between feed line plane and ground plane. Is it possible to design a dual polarized antenna with. The main advantage of this type antenna is increased the bandwidth of the antenna as compared to a single layered patch antenna. A few technique have been introduce to obtain dual polarized antenna such as aperture coupled microstrip antenna, two port corporate feed network and two or more probe feeds technique.
Nikmehr, a dualband dualpolarized microstrip array antenna for base stations, progress in electromagnetics. Aperture coupled microstrip antenna design and analysis michael paul civerolo a linearlypolarized aperture coupled patch antenna design is characterized and optimized using hfss antenna simulation software 1. Transmission from a circularly polarized antenna received by a linearly polarized antenna entails a 3 db reduction in signaltonoise ratio as the received power has been cut in half. The top patch of the antenna is of a rectangular shape having a rectangular slot of dimensions exactly same as the dimensions of the bottom patch. A fully printed multilayer aperturecoupled patch antenna using hybrid 3d inkjet additive manufacturing technique kunal a.
Many efforts have been made on the dualpolarization slotcoupled patch antennas to achieve sufficient bandwidth, low back radiation, low levels. It performed with receive and transmit aperture illumination efficiencies of 56% and 41%, respectively. In this paper, a dualpolarized patch antenna capacitively coupled through four feeds is proposed. Kai chang recent days, antennas play an important role in wireless communication system. The measured results show that the proposed antenna can operate over a bandwidth of 20% with an antenna efficiency of 32%, a crosspolarization level of. A broadband dual feed dual polarized microstrip antenna with low cross polarization and high isolation is presented. The purpose of this paper is to propose a smallsize circular patch antenna. One used an aperturecoupled and lprobe fed together 4. Compared with other dual polarized patch antennas reported, the bandwidth of the proposed antenna is significantly increased and an impedance bandwidth of over 110% is obtained by applying such feeding mechanism. For dual band dual polarized synthetic aperture radar sar applications a compact lowprofile design is investigated. The odph60180 antenna covers the c, x, and ku bands. Design of dual band dual polarized microstrip patch antennas.
A dualband circularly polarized aperture coupled microstrip rfid reader antenna using a metamaterial mtm quadrature hybrid coupler has been designed, fabricated, and measured. Below is an example of a dual polarized gapfed patch antenna. Dual band aperture coupled stacked microstrip patch. Dualpolarized aperturecoupled patch antennas with application to retrodirective and. Dual band aperture coupled stacked microstrip patch antenna. The operating frequencies are in the l and cbands, centered about 1. Broadband dualpolarized aperturecoupled patch antennas with modified hshaped coupling slots, ieee transactions on. A novel slotted patch antenna is proposed for dual band circularly polarized radiation using an aperture coupled feed. Improving upon previous dualpolarized antenna designs, the authors have developed a broad beamwidth slot antenna featuring low crosspolarization and high isolation. A patch antenna radiates power in certain directions and we say that the antenna has directivity usually expressed in dbi. A novel slottedpatch antenna is proposed for dualband circularly polarized radiation using an aperture coupled feed. Wideband duallinear polarized microstrip patch antenna. The array antenna offers an impedance bandwidth vswr. Aperture coupled microstrip antenna couples the patch antenna with microstripline through an aperture 1.
The wide impedance and axial ratio bandwidths are achieved by the proposed feeding mechanism, which entails the use of a circular. A stacked aperture coupled patch antenna operating at 10 ghz is applied as a feeder. Aperture coupled microstrip patch antenna is an effective way to improve its bandwidth and radiation ef. Simulated and measured gain of the proposed antenna. An aperturecoupled dualpolarized wideband microstrip antenna with high porttoport isolation in cband is presented in this paper. The basics of patch antennas, updated orban microwave. Tentzeris georgia institute of technology, atlanta, ga, us abstractin this paper, a fully additively manufactured. Input signal couples to the radiating patch trough the aperture that exists on the ground plane of microstrip feed line. The measured isolation between two polarization ports is better than 35 db and the measured crosspolarization level below. The cushaped slot is embedded on the square patch for dualband and dualsense circularly polarized radiation. Pdf a dual polarized aperture coupled circular patch antenna. Geometry of a dually polarized shorted microstrip patch antenna coupled to. A broadband dualfeed dualpolarized microstrip antenna with low cross polarization and high isolation is. Direct digital manufacturing of multilayer wideband kuband patch.
A wideband highgain dualpolarized slot array patch antenna for. An antenna can be made to have a choice of two polarizations, or have two polarizations available simultaneously. Nikmehr, a dual band dual polarized microstrip array antenna for base stations, progress in electromagnetics. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. High isolation dualpolarized patch antenna with hybrid ring. In this paper, we design the compact dualband dualpolarized patch antenna for a frequency ratio f 2 f 1 3. Nominal antenna circuit model parameters are determined from equations 3. Dual polarized patch antenna 1 dualpolarized p4tch antenna with 2% bandwidth 9 dual polarized aperture coupled microstrip antenna hfss 0 about dual frequency and dual circularly polarized antenna 16 part and inventory search. Single feeding is used because it is simple, easy to manufacture, low in cost and compact in structure. The enhanced bandwidth is achieved by using a stacked patch configuration and dumbbell shaped slots. Design of circular polarized dual band patch antenna thomas edling at the moment swedish transport administration uses a monitor system that can detect urgent errors as warm ballbearings and flat wheels etc. Smith chart of single patch dual feed aperture coupled antenna. Enhancement of the bandwidth, isolation, and low crosspolarization.
A wideband highgain dualpolarized slot array patch antenna. Compact wideband dualpolarized microstrip patch antenna k. Aperture coupled microstrip patch antenna for wifi, wimax. Dualpolarized aperturecoupled wideband microstrip patch antenna with high isolation for cband abstract. The aperture coupled patch geometry has been extended to dual.
Aperture coupled microstrip antenna design and analysis michael paul civerolo a linearly polarized aperture coupled patch antenna design is characterized and optimized using hfss antenna simulation software 1. Pier letters online design of dualfeed dualpolarized. In this paper, a kaband dualpolarized microstrip antenna is designed with an hour. Ultrawideband dualpolarized patch antenna with four. In this paper, a dual polarized patch antenna capacitively coupled through four feeds is proposed. High isolation dualpolarized patch antenna with hybrid. The selected microstrip antenna is a dual fed circular polarized microstrip antenna. The feed line creates an electric field in the aperture, which induces surface currents on the patch. A dualpolarized microstrip patch antenna structure comprising. The dual polarized antenna yields a bandwidth of 20. Symmetrical antenna designs with equal patterns for vertical and horizontal polarizations provide orthogonal farfields low farfield coupling. The cushaped slot is embedded on the square patch for dual band and dual sense circularly polarized radiation. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain.
For a single source, the system has to somehow either select one polarization or the other or the system has to properly combine them. The antenna uses a novel configuration of symmetric and asymmetric coupling slots. Chiou, broadband dualpolarized aperturecoupled patch antennas with modified hshaped coupling slots, ieee transactions on antennas and propagation,vol. Dual linear polarized cband antenna model rpd448n this antenna is designed for use in the cband telemetry industry but can be used for other communications requirements within the operating band of the antenna. Design of dualfeed dualpolarized microstrip antenna with high isolation and low cross polarization by k. A simple technique to develop dual feed dual linearly polarized aperture coupled planar microstrip patch antenna at lband frequency has been presented. A wideband highgain dualpolarized slot array patch. The dual fed circular polarized microstrip antenna is etched on a. Stuchly department of electrical and computer engineering university of victoria, victoria, b. The dualpolarized patch antennas applying probe director or coupled feeding have a limited impedance bandwidth or high crosspolarization 57. A commercial lband patcharray antenna was used to demonstrate the kaband translucence of the kaband reflectarray.
This thesis focuses on the aperture coupled patch antenna due to the lack of fabrication and tuning documentation. To avoid these errors swedish transport administration, upwis ab and. The proposed antenna is fabricated on an fr4 substrate with relative permittivity of. Design of dual feed dual polarized microstrip antenna with high isolation and low cross polarization by k. This antenna differs from any other microstrip antenna with their feeding structure of the radiating patch element. Development of shared aperture dual polarized microstrip. To meet these requirements many various dualpolarized antennas have been developed 16.
The mechanisms of the shorted dual polarized microstrip patch antenna provide wider bandwidth than full size microstrip patch antennas with high decoupling between two input ports. An exploded view of the dualpolarized microstrip antenna and a simplified equivalent circuit model for an aperture coupled microstrip antenna are shown in. I would like to clarify whether simply giving a 90 degree phase shift between the inputs at the 2 ports can help getting circular. A dualpolarization aperture coupled microstrip antenna for kaband. Simulations and tests shows that the antenna is circular polarized and have a. Equivalent circuit, aperture coupled patch antenna 2. Deng et al wideband highisolated dual polarized patch antenna using two different balun feedings 1619 fig. A wideband dualpolarized stacked microstrip patch antenna. A dual polarized aperture coupled circular patch antenna. This paper presents air gap aperture coupled microstrip antenna for dualband operation over the frequency range of 2.
Us20070126641a1 dualpolarized microstrip patch 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. A flat dualpolarized transformationoptics beamscanning. The antenna consists of circular patch and 3 db hybrid coupler. Compact wideband dual polarized microstrip patch antenna k. The nominal antenna equivalent circuit model was created in ads. The antenna consists of a cushaped slottedpatch radiator with an aperture coupled feeding system. Research and development in the 1980s contributed to the discovery of the aperture coupled microstrip patch antenna 2.
The resonant frequency of a single fed circularly polarized microstrip antenna with a thin diagonal a patch antenna with a 900 hybrid 6. The patch antenna system consists of two patches, which are printed on the same layer. Coupling effects of aperture coupled microstrip antenna. Dual feed microstrip patch antenna for wlan applications. Pdf dualpolarized aperturecoupled patch antennas with. Novel aperturecoupled microstripline feed for circularly. A circularly polarized smallsize microstrip antenna using. 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.
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. The dualband achieved by variation of air gap 2 mm to 6 mm between single patch antenna and aperture coupled microstrip antenna. Nate, jimmy hester, michael isakov, ryan bahr, manos m. Dualpolarized aperturecoupled wideband microstrip patch. They are the original type of microstrip antenna described by howell in 1972. Printed dualpolarized aperture coupled stacked patch antenna. Therefore, it is difficult to arrange an antenna element at about half wavelength in the case of the above patch antenna. Antenna makes it suitable to be used rapidly in the field of communication dual band and dual circularly polarized single layer microstrip patch antenna thattari chaithanya1, billa ramprasad2, m. A circularly polarized antenna can be used to equally well match vertical or horizontal linear polarizations. 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. Abstractin this paper, a fractal dualpolarized aperturecoupled microstrip antenna is presented. The flexible coaxial cables directly feeding technique is used in 8, 9 to improve the isolation and crosspolarization, but the antennas are relatively high. A dual polarized aperture coupled circular patch antenna using a.
A new design for a dual polarized aperture coupled patch antenna is presented. Dualpolarized microstrip patch antennas could provide these features with low cost and easy fabrication. A circularly polarized smallsize microstrip antenna using a. 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. Design of striplinefed dual polarization aperture coupled stacked microstrip patch phased array antenna for wideband application. A dual polarized microstrip patch antenna structure comprising. The design and analysis of the antennas are performed numerically using ie3d code 12. Lots of studies on improving the performances in theses domains of dual polarized patch antennas have been reported. Compared with other dualpolarized patch antennas reported, the bandwidth of the proposed antenna is significantly increased and an impedance bandwidth of over 110% is. Typical half wave patches have efficiencies well above 90%. Department of electronics and communication engineering national institute of technology rourkela 769008 certificate this is to certify that the work in the thesis entitled dual band and dual polarized. Miniaturized wideband aperture coupled microstrip patch.
A novel dual polarized aperture coupled patch element with a single. The directivity of a patch can be estimated quite easily. Moreover, an aperture coupled feed yields better gain and radiation pattern for a dualpolarized antenna aimed for wireless applications 712. It was decided to design a patch antenna from the theoretical study since it fulfils all the requirements for the antenna.
Some of these works have used an aperturecoupled feed to improve bandwidth and isolation. 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. Configuration of a dual polarized shorted microstrip patch antenna coupled to hook shape probes a top view b side view l30 mm, w7. The objective of this thesis is to design a single fed circularly polarized microstrip antenna that operates at 2. The ocean microwave dual polarized horn antenna series cover the frequency range from 6 to 18ghz and is designed for the measurement of antennas in the mw range. Duffy, a dualband circularly polarized aperturecoupled stacked microstrip antenna for global positioning satellite, in ieee transactions on antennas and propagation, vol. Variations in isolation between orthogonal feedlines and antenna axial ratio with the position of coupling slots are studied and broadband isolation and axial ratio are. Introduction bandwidth enhancement by multiple resonances is a widely used technique for microstrip patch antennas. Design of striplinefed dualpolarization aperturecoupled stacked microstrip patch phased array antenna for wideband application. Dual linearly polarized microstrip array antenna intechopen.
Aperture coupled microstrip antenna design and analysis. History of aperture coupled microstrip patch antenna aperture coupled microstrip patch antennas have become a viable option for wireless and telecommunication systems over traditional microstrip patch antennas. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. Student, department of electronics and communication engineering, warangal institute of technology and science, warangal, india. Simulated and measured normalized radiation patterns at 2. Design of circular polarized dual band patch antenna. Dual band and dual circularly polarized single layer. The antenna consists of a cushaped slotted patch radiator with an aperture coupled feeding system. The design and development of a dual linearly polarized aperture coupled circular microstrip patch antenna at cband are presented. Compact wideband dualpolarized microstrip patch antenna. Wideband dualpolarized slotcoupled microstrip array for.
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