May 01, 20 a discone is a good general antenna for the rtlsdr as they are extremely wideband, and can be expected to be useful over almost the entire frequency range that is tuneable by the the rtlsdr. This discone scanner and ham base station antenna is our most efficient omnidirectional antenna system, combining a disc antenna with electrically matched radiators. Omnidirectional, vertically polarized and with gain similar to a dipole, it is exceptionally wideband, offering a frequency range ratio of up to approximately 10. Qrp ham radio track lighting magnets ceiling lights radios. How much better would a qfh cut for the specific frequency perform than my current discone. The discone s impedance is 50 discone vhfuhf antenna the discone is a. Indeed, it is a staple for upperrange scanning receivers.
With an output impedance of 50 nominal, it can be used with any 50 instrument. About home made discone antenna the resource is currently listed in in a single category. The em6105 consists of two separate antenna designs. The feed point is usually placed at the centre of the dipole, for although this is not absolutely necessary, it can help prevent. Mechanical construction of the antenna enables it to withstand. View and download diamond antenna dj operating manual online. Design and results of the fabricated discone antenna. Antenna of mysterious origin and superb broadband performance steve stearns, k6oik learn about the development, history and some applications of a discone antenna. Rustfree stainless steel is employed in major component parts making the antenna rust resistant and durable. Reddit user soooooil has posted a series of images showing his home made discone antenna made out of wire coat hangers and designed for a minimum frequency of mhz. Pattern and impedance characteristics of an antenna with the di. Pdf design and analysis of discone antenna ijlret journal.
A discone antenna is a version of a biconical antenna in which one of. Its worth noting that the arrl has at last put up pdf files for most qst articles from the beginning through 2004 on their website with a searchable index. It is necessary to ensure that there is a balanced to unbalanced transition, i. The discone is a popular design for the rtlsdr but i wasnt happy with most of the designs spread around on the message boards as they were quick and dirty solutions that wouldnt last long at all mounted outside as a proper antenna should be. The antenna s two principle elements are a flat conducting disc mounted horizontally atop, but insulated from, a conducting cone. The djdnj super discone antenna is the first ultrawideband antenna in the market which can cover amateur radio, air traffic control and other various utility frequency bands and, in addition, even some amateur radio frequency bands within the covering frequency range can be transmitted with this antenna alone. A discone antenna is a version of a biconical antenna in which one of the cones is. This link is listed in our web site directory since wednesday jul 24 20, and till today home made discone antenna has been followed for a total of 4537 times. In this article i wish to demonstrate that by using a combination of the best of these techniques it is possible to design a new type of antenna that is capable of efficient, predictable operation over a very wide frequency range. Updated to fix bug in metric conversion of element spacings after director number six the discone is most seen as a receive antenna but is underrated. The aim was to note variations in design parameters of discone antenna in the range of 2. A discone antenna is a version of a biconical antenna in which one. More compact versions were later designed with better swr bandwidth.
Diamond antenna dj super discone antennas are ultrawideband antennas covering amateur radio, commercial 2way, cellular, air traffic control and various utility frequency bands. Kandoian, and brought to the attention of radio amateurs in the later 1940s, the following years saw conversions of the design to hf use. These antennas offer incredible bandwidth in a compact package, making them ideal for apartments or small lots. The rf9072 antenna is designed to provide lowangle omni. Would it be a marginal improvement, or night and day. A discone is a good general antenna for the rtlsdr as they are extremely wideband, and can be expected to. Ham radio antenna home brewing radio activity repurpose design tips art ham radio. The first of two designs uses wire radials for both the disk and the cone portion of the antenna. The discone antenna is a broadband basic antenna originally designed for vhf uhf service.
This paper presents analysis of variation of various parameters on design of discone antenna. May 22, 2019 i put my diamond dj discone back up without the whip discone portion only and decided to see what the swr plot looked like on an antenna analyzer. Get the ultimate wideband performance with a discone antenna. Design of uhf miniature discone antenna ieee conference. Bpvlb100400 designed for a variety of base station and tactical applications, the bpvlb 100400 is a compact vertically polarised broadband antenna which operates in the frequency range of 100400 mhz with power handling of 500 watts cw. Dec 02, 2010 design of uhf miniature discone antenna abstract. The arrl antenna book has an interesting article about hf discone antennas including some historical facts. Sarris the wide band of frequencies that includes all those allocated to 2g3g applications was defined as 2g3g band and the discone antenna with a structure of radial wires was defined as radial discone.
Kandoian, and brought to the attention of radio amateurs in the later 1940s, the following years saw conversions of the design. Pdf a wideband discone antenna is designed for rfi monitoring find, read and cite all the research you need on researchgate. Terminated coaxial cage monopole the tc2m tc2m antenna. The dj super discone antenna is an ultrawideband antenna covering amateur radio, commercial 2way, cellular, air traffic control and various utility frequency bands.
Many antennas have been invented simply by necessity. Wideband discone antenna model em6105 10 khz 2 ghz. A discone antenna typically has at least three major components. Also we provide specific frequency discone type antennas according to. A discone is a good general antenna for the rtlsdr as they are extremely wideband, and can be expected to be useful over almost the entire frequency range that is tuneable by the the rtlsdr. It is usually mounted vertically, with the disc at the top and the cone beneath. It can cover multiple bands and has more gain than verticals. The discone antenna is used for many radio communication applications from radio scanning and monitoring for the commercial or military services to the home scanner enthusiasts. How to build several easy antennas for amateur radio. A prototype skeleton discone antenna for 2nd and 3rd.
Pdf analysis of variation of various parameters on design. You can use it to receive and transmit a wide range of signals, including amateur radio, aircraft and other special services, on your scanner or other receiver. Professor, department of ece, k l university 2student, b. White paper discone antenna design highpoint security. I put my diamond dj discone back up without the whip discone portion only and decided to see what the swr plot looked like on an antenna analyzer. The diamond dj discone antenna receives solid from 25 to 0 mhz.
Rustfree stainless steel is employed in major component parts making the antennas rust resistant and very durable find diamond antenna dj super discone antennas dj and get free standard shipping on orders. Dj dj original diamond vertical discone antenna 10m23cm. Antenna, ve3sqb ham radio antenna design software programs. Discone antenna a discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc. The complete defense discone antenna is supplied with powder coating finish to protect the antenna further from severe environmental conditions. Im interested in getting better noaa satellite images.
This document shall not be reprinted in part or in whole for any commercial enterprise. In order to simplify explanations from this point onwards. Discone antenna design written by bill pretty highpoint security technologies property of highpoint security technologies inc the user of this document may use the contents to recreate the design for their own non commercial use. Another page on a home made discone also designed for a minimum of mhz is here with some brief instructions links to design calculators. View attachment 556770 my analyzer only goes up to 170 mhz, so hopefully someone else has one that goes up higher and a discone and can post a plot that goes higher. I have a scanner discone on my balcony that ive used for most of my ham radio and sdr hobby activity. Amateur radio has been a supreme way of communications for many ways of getting messages from one place to another for decades. A discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc. When employed as a transmitting antenna, it is often less efficient than an antenna designed for a more limited frequency range. Many antennas are based on halfwave dipoles fabricated from wire or tubing.
The discone design offers the best performance possible in an omnidirectional antenna. The chicken wire wonder a unique broadband vertical antenna for the hf bands ill bet youve never seen a tapered area small helix tash antenna. Pdf discone antenna design for rfi monitoring researchgate. The antenna s feed point is at the center of the disc. The original g5rv antenna design included the circuit for a suitable tuning unit, although there are many tuning units that are able to provide a good match. A novel double discone antenna is composed of the asymmetric biconical antenna and upsidedown discone antenna.
This item tram 1410 broad band disconescanner base antenna. This novel design has evolved through computer modeling and testing for optimal performance. Its typical gain is 1dbi on the greatest radiation direction. In order to form a back cavity, the bottom of the cone is expanded and bended upward. I am just questioning the benefit of grounding as the discone. The vhf dipole antenna at vhf and uhf, most antenna systems are derived from the dipole or its complement, the slot antenna. The main category is receiving only antennas that is about receiving only antennas. Free online engineering calculator to quickly estimate the geometric size of the parts of a discone antenna. Awd series wide band discone antenna uses 6063t6 ultra corrosion resistant architectural aluminum alloy and is specially designed for omnidirectional coverage. In this paper, a novel miniature discone antenna operated in the ultrahigh frequency uhf band is presented. The chicken wire wonder a unique broadband vertical.
His instructions show how to build it out of parts and tools sourced entirely from hardware and electronics stores. I just mounted my radio shack discone antenna to a metal mast which is mounted to my wooden frame chimney. A discone is a wideband antenna that is a great starting antenna for general rtlsdr use. Pdf the wide band of frequencies that includes all those allocated to 2g3g applications was defined as 2g3g band and the discone antenna with a. Biconical antenna was designed for a frequency range of 400 mhz 1750 mhz and the. The introduction of the back cavity increases the cone angle and reduces the total size. Until then design the antenna for a 1% lower frequency and inform me of the results. Id try searching that with discone as a keyword and see if you can find any reports. The discone antenna is a broadband basic antenna originally designed for vhfuhf service. Dj super discone antenna the dj super discone antenna is an ultrawideband antenna covering amateur radio, commercial 2way, cellular, air traffic control and various utility frequency bands.
The d3000n super discone antenna is an ultrawideband antenna covering amateur radio, commercial 2way, cellular, air traffic control and various utility frequency bands. For this reason, trade offs are made in the design of these antennas. The discone antenna or discone aerial is often used where an omnidirectional wide band or bandwidth rf antenna design is needed. Pattern and impedance characteristics of an antenna. By adding a lna, it can be used as an active antenna, and the gain can be increased to larger than 10dbi, but it is changed to a received only antenna. It can also be used for transmit on 50, 144, 430, 900 and 1200 mhz ham bands under 100 watts. Rustfree stainless steel is employed in major component parts making the. Ive moved my antenna higher, into my roof space in my house as opposed to behind my house in the back garden.
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