Copper dualband super j pole antenna by ka0nan, april 1993. The jpole antenna, more properly known as the j antenna, was first invented by hans. When given the proper details, our engineering team can size the proper pole and bracket assembly for your application. Special rohn factory limited edition run of the h50 5 section mast collapses down to 99. Used as a vertical vhfuhf antenna, the j pole has the advantage that it is omnidirectional, has a low angle of radiation, and does not require.
The necessary parts for this project can be found in table 1, and figure 1 can be used as a basic assembly guide for building the antenna. The jpole makes a great base station and emcomm emergency communications amateur radio and scanner antenna. The jpole antenna is an omnidirectional antenna that can be used for base, mobile and field day stations. Free pdf printer and other freeware create pdf documents from windows applications convert microsoft access databases to mysql. Since the antenna needed to be vertically polarized, i hit upon the notion of a jpole. Matching to the feedline is achieved by sliding the connection of the feedline back and forth along the stub until an impedance match is obtained. This antenna was patented in 1909 by the german, hans beggerow. The zepp antenna received its name from its use on zeppelin airships. Balun designs for wireless mixers, amplifiers and antennas. Move the coax clamps up and down in parallel for the minimum swr then trim the length of the long element for resonance. The switching network consists of a singlepoledoublethrow spdt switch and a. Auto applicator an autoapplicator is used in peel and stick applications on conveyor.
Unlike the popular ground plane antenna, it doesnt need ground the dbj2. Our intention here is to design a compact monopole antenna, which can be used simultaneously for wlan as well as rfid systems. Antenna s direct fusion clearstream fusion amplified uhfvhf indooroutdoor hdtv antenna with 20inch mast. The jpole antenna is an excellent choice for a low cost scanner antenna that is capable of picking up signals from a wide range of frequencies. Other very good j antenna designs published in 73 magazine have been. The j pole antenna is a popular antenna design among amateur radio operators because it is effective and easy to build. Let us be your partner to learn how to install tv antenna equipment. You will first need to cut five 191 4 inch sections and one 23 4. The main category is 14 mhz meters ham radio antennas that is about 20 meters band antennas. Rca outdoor 60 mile antenna with mast uhf, vhf and hdtv. Antenna installations will not be allowed on primary corner poles, poles with transformers, capacitors, primary cable terminations, primary switches, or primary metering.
Ruggedly constructed one piece design, this jpole antenna will last practically forever. I already have one self supporting 20 mtr cpole antenna. In this guide, we run through the basics of rfid printers. Pattern and gain predictability is crucial in commercial work where installations are modeled. To find the resonance point of the antenna, sweep the fm10a vfo while observing. Their performance at a specific site is unpredictable because the jpole antenna interacts with nearby objects like the coax, mast, tower, building, etc. Need lots of room, keep them away from metal objects like heaters and ducts wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. Lowcost printed flexible antenna by using an office printer for. Its common for antenna manufacturers to specify maximum allowable deflection on the pole. Installation of the utility pole iw5edi simone hamradio. Of all simple vertical antennas over ground, the 58 wave radiator has the lowest angle of radiation, however the base of the 58 antenna presents a relatively low impedance, not the high impedance. Our uhf slim jim antenna delivers up to 6dbi of gain on the 440 470 mhz uhf bands, which is almost twice the gain of a jpole and 5 times the gain of a 14 wave groundplane antenna.
Pdf pattern switchable antenna system using inkjetprinted. Being a halfwave antenna, it provides a small gain over a. Autoapplicator an autoapplicator is used in peel and stick applications on conveyor. The sinclair clamp017a antenna pole mount is for mounting an antenna pipe to a wood pole. I have also included the full sized unsplit template if your printer can handle large enough paper. A portable vhfuhf rollup jpole antenna for public service edison fong, wb6iqn. Online calculator jpole antenna designer changpuak. The super jpole antennacollinear design mark twain.
A practical approach to hf and vhf antennas, plus antenna. If you watch closely, you can divide the jpole in two pieces. Product rca outdoor 60 mile antenna with mast uhf, vhf and hdtv. Sinclair pipewood pole clamp clamp017a from solid signal. Thus, it can be easily analyzed using image theory 25,26,27. G28 home the 3d printer or move the toolhead to the origin g29 use a probe to measure the flatness of the bed then compensate by leveling or tramming the bed via a live z offset g90 set all future commands to use absolute coordinates as opposed to a. Works well with handheld ht radios, base stations, and repeaters.
Its basically an endfed omnidirectional halfwave antenna, matched to. Tie the antenna lead 24 of 14 stranded wire on to twine and when the antenna is at the top of the flag pole, pull the antenna lead out of the hole. After evaluating the simulation results and obtaining the desirable performance characteristic, the design file is converted and exported to stratasys object. Three dimensional direct print additively manufactured highq. There are many ways to support an amateur radio antenna. Sinclair pipewood pole clamp clamp017a the right digital antenna installation is critical to you receiving the most hd channels available in your area. A dipole antenna is a straight electrical conductor measuring 12 wavelength from end to end and connected at the center to a radiofrequency rf feed line. Common required details for sizing include wind zone, projected antenna profile and number of attachments per pole.
A compact printed monopole antenna for dualband rfid and. This antenna, also called a doublet, is one of the simplest types of antenna, and constitutes the main rf radiating and receiving element in various sophisticated types. The super jpole antennacollinear design below is a javascript for calculating the lengths of tubing to be used for the construction of a super jpole. More than one rad center may be allowed on a pole, although no more than three antennas. Antenna, brian cake, kf2yn, qst, apr 2004 omni directional low angel of radiation performs well with no ground system ground currentsloses greatly reduced over a ground mounted vertical for 20 mtrs 40 wide by 15 tall and a foot or two off the ground. A little searching around essex pack identified a tree with some open space to the south. Theory the jpole antenna consists of a halfwavelength radiator fed by a quarterwave matching stub. Also, see how quickly you can install a modest antenna like the radio schlock fm antenna. Since it is the second version of this antenna, i call it the dbj2. Rohn h50 50 foot telescopic antenna mast is designed to support light duty antennas in various applications for mounting offair tv antenna, amateur ham radio, wireless internet antenna, mmds and cell phone signal booster installations at 18776600974. The antenna is longer than an letter sized or a4 sized paper.
Siteinstall variables that interact with a jpole are almost impossible to model. The simulation and optimization of the antenna elements was carried out using a commercial fem solver hfss. The sketch below shows its conceptual design from that patent. J pole antenna calculation calculate dimensions for. Pattern switchable antenna system using inkjetprinted. The jpole can be cheaply, simply and quickly constructed using a variety of techniques, some of which are discussed. A2 dipole adjustment required to change resonant frequency 43 fig. A further consideration is that the pole itself should be at least 3 feet taller than the top of the antenna that is mounted to it. So you have to print the template in two parts labeled part1 and part2 in the zip file. Free online engineering calculator to quickly estimate the geometric size of a jpole antenna. Plus the antenna also have the great low noise floor and wide bandwidth typical of our other antennas. Ver2calwire antenna actuallyaver2callyorientated resonate12wavedipolewith theearthbeingthe return half duetopoorground conduc2vitya. This antenna consists of a pair of radiation metal arms and a microstriptoslotline transition structure. Download and print antenna template print out one copy each of part 1 and part 2 of the.
Buck rogers sr practical antenna handbook by joseph j. This antenna has a fairly isotropic pattern, which makes it a good transmitter receiver for portable devices. The slim jim, designed by the late fred judd, g2bcx, can be a great portable roll up antenna, if made out of 300. Make sure to set your printers properties to original size not best fit to page. The radiating element of this antenna must be clear of nearby metal objects by at least inchey if side mounted on an use 6 foot side mount top of antenna may requne. Pictures of home inkjet printer, silver nanoparticle ink and fabricated antenna.
Hf antennas especially stealth models for those in an hoa. A lowcost inkjet printing method for antenna fabrication on a. Attic antennas many types of antenna can be mounted in the attic if you dont have radiant barrier tech shield. I merely hung one cpole in that tree and set my self supporting cpole about 44 58 wavelength on 14. The switching network consists of a singlepoledoublethrow spdt switch and. Essentially, a jpole is a 12 wave resonant antenna connected to a quarter wave matching stub. Rohn 9h50 34 foot telescopic tv wireless antenna push up mast made in the usa. Kinsner, ve4wk jpole antenna for 2m 3 of 3 1 2 3 4 5 6 7 8 e d c b a e d c b a 1 2 3 4 5 6 7 8 5 june 1992 jpole parts list procedure p2 m1. This link is listed in our web site directory since wednesday jul 16 2008, and till today c pole antenna has been followed for a total of 3908 times.
The j pole antenna is an adaptation of a 12 wavelength radiator end fed by a 14 wavelength transmission line that was developed as a trailing hf antenna for zeppelin airships in the 1930s. Jpole antenna and picked up what i needed to make the portable antenna project a reality. Basics the antenna consists of a vertical halfwave dipole that has been folded virtuthe c pole a ground independent vertical antenna kf2yn takes the vertical to new heights with this folded design that doesnt require a counterpoise. In this project a printed dipole antenna is being designed. Many scanner aficionados prefer the discone antenna, but the jpole has some distinct advantages over discones for scanner monitoring. Kf4eoks 2 meter super jpole antenna build super jpole for 435mhz by vk6ysf the world wide web prepared by paul howarth vk2gx. Can you use a pipe cutter or a hack saw,can you solder then here is how to build a simple j antenna that will morethan double your 2. Online physics calculator that calculates the long, short section, feed point, spacing dimensions values for current frequency.
W4rnl top five backyard multiband wire hf antennas. Pattern switchable antenna system using inkjetprinted directional. The jpole antenna is an endfed omnidirectional halfwave antenna that is matched to the feedline by a quarter wave parallel transmission line stub of lecher system form. About c pole antenna the resource is currently listed in in a single category. A compact printed dipole antenna with wide impedance bandwidth is proposed in this paper. Paul deffenbaugh for his support in using the 3d printer and the laser. Design and fabrication of antennas using 3d printing pier journals. Add a loop of string to the top, and hang it on a tree branch, use. Pdf in this paper, we propose a paperbased pattern switchable antenna. Unfollow antenna poles to stop getting updates on your ebay feed. A discussion of antenna theory by paul graham k9erg j pole calculator and drawing by k4abt g. It does not need a ground plane, radials or a complicated matching system.
This calculator can be used to design a slim jim or a j pole antenna. Printed dipole antennas are of interest, when an electronic product, which is implemented on a printed circuit board pcb is in need of a cheap, compact antenna. Pole antenna tuned for 89 mhz in the fm broadcast band g. Marine 155 159 mhz landmobile and scanner jpole antenna. Easy up ez tm20 20 outdoor tv antenna telescopic mast pushup pole 2 section 16 gauge inner, 18 gauge outer, mast collapses down to 10 feet in length that with overlapping, extended mast length is 193, used for mounting offair tv, ham radio, mmds and wireless internet antennas not included.
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