In this tutorial i will discuss a little bit of theory behind the yagi and then go into the design and construction. Zte wf721 external yagi antenna 18db 800mhz 850mhz. The 700800900 mhz collinear rfi range of collinear antennas has been reengineered and features higher power ratings and improved construction. The measurements below are for building a simple dipole antenna.
It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. To be combined with a yagi uda antenna or used as is. Aluminum yagi antennas vhf, uhf, and 800900 mhz mya. Long yagis are commonly used from the 144mhz amateur band to the 2. The dl6wu yagi is highly regarded as being easy to build with repeatable results, broad bandwidth and a useful pattern. Folded dipole fully insulated from boom directorreflector diam 2. Yagi calculator is a program build to produces dimensions for a dl6wu style long yagi antenna. The 700800900 mhz yagi rfi range of high gain yagi antennas feature standard aluminium, ruggedised aluminium or stainless steel construction.
This antenna is very adapted at vhf and uhf domain inside 30 mhz to 900 mhz. Supporting 700 800 900 mhz bands, the ant2 is suitable for a wide range of 3g4glte applications. While it does not work as well on lower frequencies if you need extra range on a 700 800 900 mhz. The formula and basics of yagi antenna calculator are also explained with example. For an good efficacity and directivity on radio spectrum its necessary to use an yagi antenna. Collinear antennas are available in standard aluminium, ruggedised and stainless steel versions.
A well designed yagi antenna as per the design given below can cover a line of site distance of even 5 kms with just 1 watt rf power. Yagi calculator this is where you input the center frequency in megahertz. Scanner antenna is possibly the best antenna available for 700960 mhz. Buy zte wf721 external yagi antenna 18db 800mhz 850mhz 900mhz 1800mhz 1900mhz at amazon uk. The dl6wu yagi is highly regarded as being easy to build with repeatable results. Buy wilson 14 db 800 mhz yagi cellular antenna 301111 and wilson400 20 feet ultra low loss coax cable 952320. Yagi calculator is a windows program that also runs well on linux, ubuntu 8. The separation will remain the same for all the elements and the lengths of these extra directors will all be the same as the 1st director. All models feature rugged 6061t6 seamless aluminum construction, stainless steel hardware, and through boom mounting of all elements for years of reliable service. The ant2 is designed specifically for long distance clients connecting to mobile communications towers. With yagicad it is possible to enter a base design from scratch or use one of a number of saved well known designs. Remtronix 800 mhz portable bnc antenna scanner master. Computer requirements the minimum requirements to run yw and its companion windows programs tlw, transmission line for windows and hfta, hf terrain assessment are a pc running windows 95 or later, including windows 98, 98se, xp and windows 2000. Theres many calculators and formulas on the internet.
The hyperlink hgv906u is a high performance omnidirectional antenna designed for the 800 mhz 900 mhz ism band. The distance between one point to another adjacent point in a wave is known as the wavelength. Then walk around the house with the yagi and scanner connected of coursepointing it. The program lies within office tools, more precisely calculators. I do not know all mesurements and i am not so good with math. While appearing to be well made of the proper durable materials the chinese antennas had no taper to the director lengths and the spacing was entirely wrong for 1090 mhz. Monitoring 700 and 800 mhz trunked digital and analog public safety radio systems can be very challenging when you are either too far from the system and signals are weak or, alternatively, when you have too much signal from multiple simulcast transmitter sites that are transmitting the same signals on the exact same frequencies or even different nearby frequencies. These antennas were made with this process, and tested on this backyard antenna range. Free online engineering calculator to find the dimensions of a yagi uda antenna for a given frequency range and length. It is ideally suited for multipoint, non line of sight nlos and mobile applications where high gain and wide coverage is desired. Our antivirus scan shows that this download is malware free.
If you want to put this thing outdoors, do not use brass, as it. If you decide you really need a yagi with more elements, here are the lengths of them. This antenna has been replaced with the model 314411 wideband directional antenna. The size of the latest downloadable installer is 1 mb. I thank john drew for making this calculator available. You literally have to find the control channel first. I like to use the basic dl6wu wideband yagi designs whenever possible. The measurements below are for building a simple dipole.
So by request i am finally writing a diy yagi antenna tutorial. If youre an amateur radio hobbyist who monitors the 800 mhz police, fire and public safety bands, a homemade wideband scanner antenna may improve your reception. Uhf and 700 800 mhz bands, have been specifically designed for applications requiring high performance. The correct lengths for the various models will be displayed in the chart. Ive tried using every antenna combination given, from a paper clip to the 800 mhz rs one. This method of construction can be used on most uhf through low microwave yagis, and is especially useful for the 33, 23 and cm bands. This program calculates the focal length and x, y coordinates for a parabola of any diameter and depth. Calculator 3element yagi maple leaf communications. This antenna will work on all operators using 800mhz to 2300 mhz frequency. This design can then be optimised or scaled to suit particular requirements. Yagi uda antenna calculator you may want to combine it with a folded dipole.
Wire antenna calculator amateur radio station ws6x. The antenna is designed to be fed with 50 or 75 ohm coax cable of most any length with a balun. I dont care about multiband reception strickly 700 800 range, any ideas how much to chop and where would be appreciated, thanks. All you need to do is enter the desired resonant center frequency in the form below, then click calculate.
The cubical quad antenna calculator for citizens band cb radio and amateur radio communications to calculate the spacing between the reflector and driven elements and directors. It has the best gain for its sizes and a correspondingly narrow main lobe beam. The wilson yagi antenna for 700800 900 mhz band from wilson electronics is an outdoor wideband antenna upgrade or replacement for. While there are plenty of high performance antenna designs. Antenna calculator calculate your dipole, 3 element yagi etc find the length of a dipole. Our extensive range of collinear antennas is available in traditional frequency specific designs and feature our patented broadband low pim pcb based. The following program will calculate the lengths needed to construct several popular wire antennas. The antennas described in this article were built as the result of several discussions between kent and a cuban radio operator. Yagicad is a fully integrated analysis and design package primarily intended for vhf yagi aerials.
This calculator will help you to calculate the different wavelength of. Pdf design of a closely spaced, folded yagi antenna. This series of yagi antennas provides the user with. An application designed to generate data for the construction of long yagi antennas for vhf and uhf use. Unless you are a aarl handbook geek, download a program that will help you design your perfect yagi. It is shown that a threeelement yagi can achieve a realized gain of more than 6. The dimension of the antenna below is in function of the frequency. Ideal for point to point, short or long link applications. Long yagi are commonly used from the 144mhz amateur band to the 2. The actual developer of the free software is john drew. Based on rothammel dl6wu you may want to combine it with a folded dipole.
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