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A cantenna ( blending the words can and antenna) is a homemade directional waveguide antenna, made out of an open-ended metal can. Cantennas are typically used to increase the range of (or discover) wi-fi networks. Although some designs are based on a can, this tube is too narrow to increase the 2.4 GHz signal by a useful amount, although at 5 GHz it would be about the right size. However, a cantenna can be made from various cans or tubes of an appropriate diameter. Some designs include a pole mount to elevate the cantenna.

,,,this is...

Can be made of a pcb board and a metal reflector

,,,goto Modeling>History List>delete all farfield ,,,install another frequency>>>

When you increase the frequency range, you must delete the old frequency range and install the new one."

,,,another type of Bester Antenna ... Article numberAX-1500 OFFSET BOX Input impedance, Ohms50 Overall dimensions, m0, 145x0, 145x0, 154 Permissible power, W10 Protective coatingpowdered polymer paint SWR in the operating frequency range, max.1,3 Weight300 Casing materialABS+Polycarbonate Irradiator materialgalvanized steel Polarisationleft\right circular map Operating frequency range, MHz1525 - 1575 ConnectorsSMA-male on flexible cable Resulting gain (and bottom width) for different dish diameters25,6dBi ; 16,8dBi ; 17,6dBi ; 21,1dBi ; 24,3dBi The resulting gain and level width of the radiation pattern is 3dB0.55 m 16.8 dBi 23 gr. 0.6 m 17.6 dBi 21 gr. 0.9 m 21.1 dBi 14 gr. 1.3 m 24.3 dBi 9 gr. 1.5 m 25.6 dBi 8 gr. Native gain, dBi10 Width of the DN lobes in the E-plane (horizontal), °110÷120 Width of the DN lobes in the H-plane (vertical), °110÷120

,,,inside(section) of the connectors...

,,,dimensions are shown in the images above...!!!

Usually a Loop antenna exhibits a higher gain than a Yagi antenna with the same number of elements

In this tutorial you will learn how to simulate antenna devices in CST-Studio...https://space.mit.edu/RADIO/CST_online/mergedProjects/EXP_HF/examplesoverview/patch_antenna.htm

ECO, THE IMAGES ARE NOT VISIBLE...!!! "For how big the reflector is, the antenna gain is not that great."

I finally managed to do a simulation with this antenna....

A new small, low-profile and light-weight helical antenna element was designed for 2,1-2,4GHz-band communications. The novelty of the antenna is that its input impedance matching has been improved by adjusting the copper strip matching stub, while its circular polarization performance has been enhanced by changing the parasitic radiation patch loaded in the front of the antenna.

Featured outdoor antenna products which enhance your reception of 4G signal from the tower to your location. All antennas featured are easy to install and it is with the connectors required to connect to your existing modem.

You have many choices in selecting an antenna for a Wi-Fi wireless network adapter for your computer. If you use the antenna that came with the adapter and experience weak reception and slow Wi-Fi network performance, unscrew the stock antenna and replace it with a higher-gain model. Wi-Fi equipment makers rate compatible antennas in units called dBi. The higher the dBi rating, the stronger the antenna’s reception. Isotropic Antenna Wi-Fi antennas obey the same laws of nature that govern all other radio antennas. The isotropic radiator is the simplest theoretical radio antenna. It is a point source that produces radio waves equally in all directions. However, the isotropic antenna is just an idea; you cannot actually make one because it violates fundamental laws of physics -- thus, it is only theoretical. However, it can serve as a standard by which you can measure other antennas: the decibels --db -- compared to an isotropic radiator. Antenna Gain Every antenna has gain, a quality by which it increases the strength of a radio signal. Two main factors affect an antenna’s gain: shape and size. Shape influences the antenna’s directionality, or how it receives radio waves from different directions. The wavelength of the radio waves determine the radio’s size: an antenna receives signals best if its size matches the size of the radio waves, or is one-half or one-quarter the wavelength. For most uses, the better the antenna design, the higher the gain. Decibels When radio engineers compare the gain of antennas, they use the decibel system. A decibel is ten multiplied by the common logarithm of the ratio of two numbers. For example, if you compare 1 milliwatt and 10 milliwatts of radio power, you divide the second by the first and obtain 10. Taking the common log of that gives you 1, and multiplying it by 10 gives 10. The second amount is larger than the first by 10 decibels, or 10 dB. dBi Rating The dBi rating for a Wi-Fi antenna compares its performance to an isotropic antenna. If the isotropic antenna produces 1 milliwatt of radio wave power and the Wi-Fi antenna produces 2 milliwatts, that is 10 * log(2) or 3 dBi. If another antenna produces 3 milliwatts, that is 10 * log(3) or 4.8 dBi. Though the isotropic antenna doesn’t exist, it still serves as a reliable way to compare Wi-Fi antennas. You can compare the dBi ratings of the two antennas and choose one with the better dBi rating.

Model wireless network USB adapter TL-WN721N Lite N series supports IEEE 802.11 g and IEEE 802.11 b. It works great with all devices of the standards 802.11 b/g/n. An automatic detection of speed allows the wireless network USB adapter TL-WN721N to transfer data at high speeds (maximum capacity to 150Мбит/s).

Bottom of a circular metal box can build a simple antenna with an elliptical radiator...

,,,the feed point is not positioned there...!!!!

,,,for Clanon... PAGODA.stl

Technical specification for manufacture of powerful antennas and high gain exclusively for FPV needs was consistent with the known Scientific-Production Center. The centre has a serious scientific potential, SOOOOO expensive equipment, modern production base and its patented production technology. The guys have been designing and manufacturing aerials for over 15 years and know about antennas just about anything, have experience of working with domestic manufacturers of UAV, FPV, therefore, subject them in part familiar and in this respect they have certain practices. Just what we needed: 1) Create an antenna that would have a large gain, comparable with the antenna "Yagi" in the popular FPV range 1160-1280Mhz. 2) To the antenna form factor was close to a patch antenna (for ease of placement on a tripod) 3) had an adequate angle of orientation, eliminating the need to use the rotary system for tracking the model at long distances Antenna gain from a 14.7 dB at the extreme frequencies of the range 1160Mhz 1280Mhz. Not difficult to guess that the gain in the middle of this range is significantly higher (the guys understand the task "literally"). This reinforcement is "not theoretical" and measured on real devices, on average, it in two times better than any patch. 2) the Antenna has dimensions of 400х400х25мм (including the case) 3) the Angle of orientation of the antenna about 40 degrees, which is not bad. Specifications : The most effective frequency range: 1160-1280Mhz The gain in the effective frequency range: 14,7 dB VSWR: less than 1.5 Polarization: linear vertical The radiation pattern Vert/Horiz: 40/40 degrees Input impedance: 50 Ohm Connector: N-type "mother" Weight: 2kg As we can see, the antenna is a... rather strange design four groups oval active elements. Between them the special material. The reflector is a metal substrate, the active elements in each group, TWO(!!!) (instead of one in the classic patch).

I think you should put an SMA connector instead of the discrete port - that might be the mistake....!!!