A short backfire antenna is a type of a directional antenna, characterized by high gain, relatively. Although a rigorous theoretical solution has not yet been found for this new type of antenna, experimental studies have enabled us to optimize the most important parameters. The short backfire antenna is excited by dipole structure consisting of straight and cross dipoles. Both the backfire and the dish antennae are high gain antenna types that transmit a narrow beam of signal. For short, these are herein called backfire antennas. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. It has a shape of a disc with a straight edge, with a vertical pillar with a dipole acting as the driven element in roughly the middle and a conductive disc at the top acting as a subreflector. Download as pptx, pdf, txt or read online from scribd. Index termscircularly polarized antenna, short backfire antenna sba, slotfed antenna. Bandwidth enhancement of a backfire microstrip patch antenna for pervasive communication papapolymerou, development of a wideband short backfire antenna excited by an unbalancefed hshaped slot, ieee trans. However, a microstrip patch fed short backfire antenna had a broad eplane radiation pattern main lobe, leading to a loss of gain and low. It has a shape of a disc with a straight edge, with a vertical pillar with a dipole acting as the driven element in roughly the middle and a conductive disc at the top acting as. A backfire antenna fed by a dipole located near the big reflector r 2r antenna. Disc lite5 disc lite5 disc lite5 the disc is a low cost high gain 5 ghz cpe.
Unfortunately the dipoleexcited sba has a narrow bandwidth for its input impedance 5. However, the spatial dispersion from the source element of these phantom elements is limited. Us5619216a dual polarization common aperture array. The design proposed in this article is dedicated to short backfire antennas fed by a dipole or a crossed dipole. This link is listed in our web site directory since sunday may 7 2006, and till today 2. A cost effective design is proposed to get metallic rim from the dielectric rim. Pdf a lowcost wideband short backfire antenna sba and a circularly polarized cp sba are presented. Cost effective dual band short backfire antenna core. A feeding screw shortcircuits the inner conductor with the outer conductor of slotted coaxial line. Simulations performed using ie3d and mws agree with measured data, thus far, and indicate an 11% 15db bandwidth and a maximum directivity of 15. Short backfire antennas sbas are widely utilized for mobile satellite communications, tracking, telemetry, and wireless local area network wlan applications.
He told me that the reason why he selected my book over others was. By using a unique and innovative short backfire antenna design, we were able to achieve 21dbi antenna gain in a compact and easy to deploy package. Backfire antenna article about backfire antenna by the. Jan 30, 1990 both the image plate antenna and the short backfire antenna operate, in part, on a spatial dispersion concept that generates phantom elements so the antenna behaves as if it had more elements. The objective of our research is to develop novel antenna structures for broadband andor multiband satellite and wireless applications such as 3g, 4g, wifi, wimax, and dvbh. A microstrip patchfed short backfire antenna for the.
Image plateshort backfire antenna general dynamics. Short backfire antenna gzf9003v wireless repeater users manual 3. Us5619216a dual polarization common aperture array formed. A new excitation technique for wideband short backfire. The microstrip short backfire antenna is one of the most preferable for wireless communications, especially when a builtin antenna is required. The study presented in this article is dedicated to the backfire diskonrod antennas fed by a dipole or crossed dipole. If you would like to participate, you can choose to edit the article attached to this page, or visit the project page, where you can join the project and see a list of open tasks. By changing the geometrical parameters and feeding structure, the short backfire antennas can generate different kinds of radiation patterns, including narrow pattern, fanlike pattern and conical patterns. Figure 3 layout of short backfire antenna excited by a microstrip patch, as developed in microwave studio. To design a microstrip short backfire antenna that operates at the cband frequencies of 4. Pattern radiates in zdirection, as indicated by axes. Short backfire antenna has an enclosed structure with two reflectors on top of each other conventionally short backfire antenna is characterized by gain of above 10 db, making it attractive for handheld radio monitoring and other manportable applications. Ronglin li, terence wu, li yang, amin rida, ji hwan kim.
The basics of quadrifilar helix antennas microsoft. Request pdf design of short backfire antennas the design proposed in this article is dedicated to short backfire antennas fed by a dipole or a crossed dipole. Novel broadband and multiband antennas for satellite and wireless applications. A new excitation technique for wideband short backfire antennas. Jun 28, 2017 a short backfire antenna or short backfire, sba, sbf or sbfa is a type of a directional antenna, characterized by high gain, relatively small size, and narrow band. This link is listed in our web site directory since monday apr 24 2017, and till today shortbackfire antenna for cm has been followed for a total of 207 times. Short backfire antenna modeling antennas wifi antennas. This article is part of wikiproject electronics, an attempt to provide a standard approach to writing articles about electronics on wikipedia. Future work involves further optimization of the radiation characteristics and the construction of the complete.
It can therefore be used as a pointtopoint antenna over short distances, but as pointtomultipoint antenna over longer distances. A lowcost wideband short backfire antenna sba and a circularly polarized cp sba are presented. Users may download and print one copy of any publication from the public portal for the purpose of private study or. Short backfire antenna pdf abstractthe short backfire antenna sba has been widely used for mobile. Both the image plate antenna and the short backfire antenna operate, in part, on a spatial dispersion concept that generates phantom elements so the antenna behaves as if it had more elements. Design of a shortbackfire antenna sbfa as the diameter of the cupdipole cavity increases beyond 1. New short backfire antennas for wireless applications core. The short backfire array effectively increases the aperture size of the collinear array 12 horizontal. Introducing of parasitic elements to short backfire. Image plateshort backfire antenna general dynamics, corp. The lowcost sba designed at the 5 ghz unii band is excited by a planar monopole which is printed on a dielectric substrate and fed by a microstrip line.
A short backfire antenna or short backfire, sba, sbf or sbfa is a. Backfire yagi antenna measurements introduction an experimental test program has been conducted to supplement the available data on the backfire yagi. A photograph of a typical corner reflector is shown in figure. With this method, a new type backfire antenna is developed. View and download hongxin gzf9003v user manual online. Design of long backfire antenna in cband abed, amer tawfeeq on.
A short backfire antenna or short backfire, sba, sbf or sbfa is a type of a directional antenna, characterized by high gain, relatively small size, and narrow band. Backfire antenna constructions with different configurations of the big reflector are considered. The design proposed in the paper is dedicated to increasing the realized gain of short backfire antenna sba in the 10% bandwidth. This link is listed in our web site directory since monday apr 24 2017, and till today short backfire antenna for cm has been followed for a total of 207 times.
Introducing of parasitic elements to short backfire antenna for. A new excitation technique is developed to improve the impedance bandwidth and to lower the manufacturing cost of a short backfire antenna sba. The backfire antenna is a modified version of the ordinary endfire slow. Antenna parameters such as reflection bandwidth, input impedance, and far field radiation pattern are presented for each kind of antennas. Introducing of parasitic elements to short backfire antenna. Since the microstrip short backfire antenna can be made with a very thin and compact structure, it can easily match various types of portable units. This antenna has moderately high gain, but its most important pattern feature is that the. Short backfire antenna has an enclosed structure with two reflectors on top of each other conventionally short backfire antenna is characterized by gain of above 10 db, making it attractive for handheld radio. Backfire antenna article about backfire antenna by the free. The design of a highgain short backfire antenna ieee conference. The pertinent features of this short backfire antenna are i dual impedance band width ii reconfigurable circular polarization iii cost effective fabrication. The short backfire antenna sbfa, first published in 1965 1, has been widely used in space, maritime, and terrestrialbased applications by virtue. The studies were carried out with different types of short backfire antennas. Backfire antenna constructions with different configurations of the big.
Jan 10, 2019 the short backfire antenna sbfa, first published in 1965 1, has been widely used in space, maritime, and terrestrialbased applications by virtue of its high gain, compact design, and rugged. Research on the short backfire antenna springerlink. The antenna achieves a bandwidth of 14% with a gain of 15 dbi, which may find applications for wimax and satellite communications. The short backfire antenna sba 2 possesses the required beam shape, however, not the bandwidth. A dipole is an omnidirectional antenna that is not suitable for point to point wifi communication systems. Future work involves further optimization of the radiation characteristics and the construction of the complete short backfire antenna structure to verify simulated result. The short backfire antenna is comprised of a linear array of slots, a strip reflector, and a plurality of baffles. Expired lifetime application number inventor hermann w ehrenspeck original assignee hermann w ehrenspeck.
The main category is microwave antenna that is about microwave antenna. A lowcost wideband short backfire antenna sba and a circularly polarized. The shortbackfire antenna as 3n itlement for highgain. A highfrequency waveguide feed in combination with a shortbackfire antenna having a cavity and multiple reflectors to permit high power handling capabilities and high frequency applications. Short backfire antenna technical specifications model ant433h frequencies 433470mhz bandwidth 30mhz vswr. Introducing of parasitic elements to short backfire antenna for radiation pattern improvement.
By using a unique and innovative short backfire antenna design, we were able to achieve 21 dbi antenna gain in a compact and easy to deploy package. This memo outlines the design effort on increasing bandwidth of a sba and. However, a microstrip patch fed short backfire antenna had a broad eplane radiation pattern main lobe, leading to a loss of gain and low aperture efficiency. New short backfire antennas for wireless applications. Scribd is the worlds largest social reading and publishing site. The simulated copol and crosspol patterns of the short backfire antenna are shown in figure 4. The antenna is developed on elliptical ground plane with dielectric rim. About shortbackfire antenna for cm the resource is currently listed in in a single category. Introduction t he short backfire antenna sba has been widely used in mobilemaritime satellite communications, tracking, telemetry, and wireless applications due to its high gain, low sidelobe level, and simple configuration. Both patterns were simulated with port 1 excited, inducing an rhcp copol element. The use of the short backfire array fed by the collinear longitudinal slots 29 produces an acceptable round beam pattern instead of the undesirable fan beam pattern without disturbing the main vertical polarization antenna array 11.
If a backfire helix antenna is used with a reflector or ground plane at the feed, the sense of the circular. Balanis, antenna theory, analysis and design, 2 nd. About short backfire antenna for cm the resource is currently listed in in a single category. Introducing of parasitic elements to short backfire antenna for radiation pattern improvement chapter one outline of the presentation 1. Pdf new short backfire antennas for wireless applications. In addition to being highly efficient, this antenna is simple, compact and easy to fabricate.
A method of analysing the short backfire antenna is proposed. From the beamwidth formula above, only a short helix of a few turns is needed. The short backfire antenna sba, developed first in the 1960s 6, 7, may become one of the most competitive candidates for these wireless application because. Introdvctiok he prisciples of backfire antennas nere first discussed by ehrenspeck in 19 0 l.
A metamaterialenabled design enhancing decadesold short. Disc lite5 is based on our popular lhg hardware design and is. Helical feed antennas a parabolic dish reflector typically requires a feed antenna with a rather large beamwidth, 90. The most popular excitation for the sba is a simple dipole antenna. A tuning screw is located opposite to the primary reflector. The basics of quadrifilar helix antennas technical article. Inverted vee antenna, whip antenna, jpole antenna, low probability of intercept radar, superdish, short backfire antenna, dielectric resonator antenna, reference antenna, ground dipole, choke ring antenna, biconical antenna, vivaldiantenna, slot antenna, evolved antenna, targeting tower, coaxial.
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