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A method to improve the gain of axial-mode helical antenna is proposed. This method involves a parasitical circular metal disk,which is installed on the front of general axial-mode helical antenna and is apart from the helical line. A circular current whose phase lags behind that of helical line current appears,which brings a more concentrated radiation field. Consequently,the antenna gain is improved, Based on the simulation results,an antenna array model fed independently is proposed.This model gives an excellent explanation of the radiation characteristic of helical antenna, Both the simulation and experiment results show that for obtaining the same gain,the antenna length in this new method is only 71% of that in traditional helical antenna.The reduction of antenna length favors the miniaturisation of antenna. In addition, this method has a little effect on the bandwidth of antenna, so it can be widely used in the design of helical antenna element and array.

Wifislax 2017 - a boot disk with a set of tools that will help test your wireless networks, identify and resolve different vulnerabilities in them. Contains a large number of drivers for the network cards from different manufacturers integrated into the Linux kernel and provides their support. Wifislax 2017 – a high level of specialized system-a software tool for security analysis of wired and wireless networks. Is a LiveCD preloaded with Slackware. Can be used for analysis and verification of security systems LANs of different types, the study and evaluation of Wi-Fi networks, as well as in forensic purposes. Wifislax 2017 out of the box comes with a huge number of drivers for network cards, both wired and wireless types, is integrated in the kernel Linux that provides native support for the vast majority of currently available network devices from different manufacturers. Wifislax 2017 is based on a code system of SLACKWARE (in earlier versions of the distribution was used a combination of SLAX and PORTEUS) and can be installed on a hard disk for permanent use. Being a "modular" operating system, it supports the expansion of functionality using the XZM-file. A GUI is provided by three related systems – KDE 4 (installed as default), Xfce and Openbox. In the distribution uses multiple cores – standard and PAE, you can switch between. Running the system with the USB stick: For recording, use the program UNetbootin, he checked, everything works fine. http://foro.seguridadwireless.net/live-wifislax/wifislax64-1-1-final-para-descarga-64220/ Modulos extra para wifislax64-1.1 http://foro.seguridadwireless.net/live-wifislax/modulos-extra-para-wifislax64-1-1/

,,,by Harry36 user.... For manufacturing, you will need galvanized iron with a thickness of 0.5 mm (no more, this is due to the height of the patch above the reflector), two SMA connectors, an M8 bolt, an M8 nut, an aluminum pipe with a diameter of 8 mm, and foamed PVC. The design is relatively easy for home production, even a round element of this diameter will not be difficult to cut with metal scissors. Follow all the dimensions and recommendations as accurately as possible and you will have a great antenna.

,,,here you can find some schemes of WiFi amplifiers...https://vrtp.ru/index.php?act=categories&article=3393&CODE=article ,,,and another 2.4 GHz amplifier scheme...

TP-Link CPE210/220 is a 2.4Ghz outdoor access point similar to Ubiquiti NanoStations. There is also a 5GHz Version of this AP, the TP-Link CPE510/520. The device has a built-in 12dBi 2x2 dual-polarized directional MIMO antenna with a beamwidth of 65° (H-Plane) and 35° (E-Plane)

The high quality Patch antenna for 5.8GHz receiver. Can increase the range of 5.8GHz transmitter

If you like pate, do not throw the covers, are good, to manufacture circular antenna patches

There is a so-called author on the internet who seems to want to dyce the spider antenna for wifi ... !!! He said..."Spider" does not work! (Ground Plane balun need!) What do you say, he's right ... ??? https://ypylypenko.livejournal.com/46797.html

Universal antenna Petra-9 MIMO 2x2 built-in professional sealed box. CRC9 connectors. F=1700-2700 MHz. GAIN=9dBi. Polarization X-pol. Standards: LTE-A, LTE1800, LTE2600, UMTS2100, WIFI. PETRA-9 MIMO 2x2 Box is the antenna combined with a large sealed box in which you can put any 3G/4G modem and even router. The antenna is provided with connectors - CRC-9. The connection of modem to PC or router located in the room is via a USB extension cable. A sealed box will protect the modem from adverse weather conditions!

TAKING INTO ACCOUNT THE FACT THAT ONE PART BETWEEN USSERS OF THIS FORUM WAS DEMANED FOR THE DESIGNATION OF CERTAIN WIFI ANTENNA TYPES AND THEIR PRACTICAL EXECUTION, THEN I WILL NOTIFY THAT IT IS POSSIBLE ONLY BY EMAIL OR PM https://ipsw.me/

Wireless access point MikroTik SXT LTE does not work in the 802.11 standard, and is equipped with LTE-modem with a directional antenna dual channel to work in LTE networks of mobile operators at speeds of up to 100Mbit. Maximum download speed up to 100 Mbps, and the return of up to 50 Mbps. SXT supports the most popular LTE band FDD - LTE 3 (1800 MHz) and 7 (2600 MHz). Has mini-SIM slot support 2G/4G network. The dimensions of the antenna

A network connects computers by means of cabling systems or wireless connectivity, specialized software, and devices that manage data traffic. http://www.rdcs.com/network-options.htm

The modems have LTE parameters LTE connection. To determine the quality of the signal, note the following fields: — Signal strength — RSRP — RSRQ — SINR — CQI The following table shows the different values of these parameters, which correspond to very poor (Cell Edge), bad (Mid Cell), good (good) and very good (Excellent) the signal quality of the LTE: Next, briefly explain each parameter, which determines the quality of the LTE signal. The power of the signal The signal power shows the level of the received modem signal LTE. These values correspond to the readings of RSSI (Received Signal Strength Indication) of the LTE connection. The value is measured in dBm (dBm). Usually routers have indicators if it means burning the maximum -90 dBm or higher (tends to zero). If any indicator is not lit, then the signal level is insufficient for the connection to the LTE network. When the values of RSRP= -120 dBm and below, the LTE connection may be unstable or not installed. RSRP RSRP (Reference Signal Received Power) is the average value of the power taken by the pilot signal (Reference Signal) or the level of the received signal from the Base Station(BS) The RSRP value is measured in dBm (dBm). The signal strength of the LTE modem can also be defined using the SIGNAL STRENGTH indicators on the top panel of the device. The maximum level correspond to three burning indicator. If any indicator is not lit, then the signal level is insufficient for the connection to the LTE network. When the values of RSRP= -120 dBm and below, the LTE connection may be unstable or not installed. RSRQ RSRQ (Reference Signal Received Quality) determines the quality of received pilot signals. The value of RSRQ is measured in dB (dB). SINR SINR (Signal to Interference + Noise Ratio), also known as CINR (Carrier to Interference + Noise Ratio) – the ratio of the level of useful signal to noise level (or signal/noise). The value of SINR is measured in dB (dB). It's simple: the higher the value, the better the signal quality. When the values of SINR below 0, the connection speed will be very low, because this means that the received signal noise more than the useful part, while the probability of loss of the LTE connection also exists. CQI CQI (Channel Quality Indicator) For each subscriber station UE (User Equipment) and each frequency carrier block formed quality indicators channel CQI (Channel Quality Indicator). Depending on the required for UE speed data transmission the base station, the decision on the number of resource blocks allocated to a particular user, and what frequency blocks to allocate to the user depends on the indicator CQI. Users are allocated to those resource blocks that have the highest CQI, and therefore, the best ratio signal/noise. This parameter can take values from 0 to 15. The higher the value, the better (the higher the speed that can be allocated by the base station operator LTE). The most important first column — the value of RSRP. For example, we got to the target BS, the average is about -90 dBi. When determining the direction on the BS used a Yagi antenna with gain (KU) 12 dBi. Antenna cable, length 5 m "eats" on the attenuation of about 1.5 dBi, add about the same number of losses at the connectors — a total of 3 dBi. Accordingly, the default level of the signal at this location: -90 - 12 + 2x1. 5 = -99 dBi. As a result of the installation of the new antenna, we need guaranteed to get at least the second row of the table, in the interval from -90 to -80. Ideally, more than -80, the first line. If we keep the same cable, you need a antenna with KU at least 18dBi, better 20dBi (don't forget about the weather and the natural "swimming" signal). The output will be if not the first row, then close to it: -99 + 20 — 2x1. 5 = -82 dBi. The result can be considered very good: provided that the indicators RSRQ and RSRP SINR vary in proportion to (and usually do), we "pull out" of the connectome at least 80% of what he can give. Assume that the maximum supported rate on the BS 30 Mbit/s. Received 30 * 0,8 = 24 Mbps. We are interested in two parameters: RSSI (Received Signal Strength Indication) level of the received modem signal. This is the main "honest" indicator of the level. Is measured on a logarithmic scale in dBm. Other parameters from tables such as RSCP, RSRQ, RSRP, CQI — are service. They usually correlate with RSSI, so they shouldn't be ignored. The second, not less important parameter, especially in dense areas – the ratio signal/noise. Denoted for 3G: ECIO (Ec/Io) or Ec/No; 4G: SINR (Signal to Interference / Noise Ratio) or CINR (Carrier to Interference / Noise Ratio). Is measured on a logarithmic scale in dB. Ec/Io is a measure of signal/noise, but very tricky. Compared to conventional SINR indicator (which is used in LTE) of Ec/Io deducted natural noise. Indicator Ec/Io = 0 dB is the level when in addition to natural thermal noise nothing. Any interference of artificial origin reduce Ec/Io. (from their own neighboring BS in the first place, this effect operators is called "cell respiration" - on the border between the cells preventing the signal level from another cell of the same operator becomes significant, and in spite of a strong total signal prevent set high speed) As Ec/Io, Eb/No, SINR, and so this is all adaptive indicators. Because the link can't work with poor Ec/Io (Eb/No), then the weak signal to improve Ec/Io of BS and the subscriber agree to lower the bandwidth: used less than RB (resource blocks) and a lower modulation scheme (QAM64 - QAM16 - QAM8 - QPSK - BPSK) Therefore, by itself, the Ec/Io does not show good signal or bad (in pulsometro this figure is NOT used). It shows the contribution of artificial noise (reflection, alien sector, industrial noise) Need to watch it paired with RSCP. RCSP of these 3 the most objective indicator is the amount of energy per 1 resource block (in LTE) or channel (in 3G) is the Received Signal Code Power (RSCP). RSCP that is used to parcometre. Also it is based on the RSCP telephone/modem decides which of the cells to connect.

Triton_Mgn says,,, Good afternoon, give the antenna a good antenna for the 1800 MHz mimo Found 2 antennas on the forum: 1 - http://www.lan23.ru/forum/showthread.php?t=12671 But, unfortunately, not its size at the desired frequency, tell me who knows. 2 - http://www.lan23.ru/forum/showthread.php?t=10879 Could you tell me the thickness of the disc, can I use galvanized? In the drawing, the antenna of this size for the lower frequency 1747,5 pink color, and upper 1842,5 green. Why, then, in the drawing there are dimensions in blue? My answer is,, it can build a patches antenna instead of a disks, a horizontal patch antenna group (at one end of the frequency band) and the other group with vertical polarization (at the other end of the frequency band)

Broadband MIMO antenna for 2G/3G/4G/WIFI. The gain of 12-15 dB. Works with all operators in the standards LTE1800, UMTS2100, Wi-Fi 2400, LTE2600. It is recommended to use complete with 3G/4G modems and routers. A wide range of operating frequencies of the antenna enables 3G/4G modems to work effectively at the boundaries of the service areas 4G. The modem will automatically switch to the 3G standard, in the absence of a 4G signal, and the antenna will provide a high-quality signal in both bands. Dimensions (length , width , height ), mm....250 x 250 x 100 ,,,, as it looks inside ...

Model #OLX19M-097130-A Frequency (MHz)5150-5825 Antenna 2 Peak Gain (dBi)13.81 VSWR2.0 : 12.0 : 1 Power (Watts) 55 Impedance (Ohms) 50 HPBW (Azimuth)30°28° HPBW (Elevation)28°34° Dimension (mm)129.5 x 120 x 5.3 Polarization Linear Connector IPEX Cable Length (mm) 160 (customized) 112 (customized) Operating Temp (C)-40~+85 Manufacturing 100% made in Taiwan

PETRA BB MIMO 2x2 UniBox is an antenna combined with a large sealed box (UniBox) which you can put any 3G/4G modem and even router. The antenna is provided with connectors - SMA-male. Included are two adapters to connect 3G/4G modems (the type of adapters to choose). The connection of modem to PC or router located in the room is via a USB extension cable. System UniBox - protects the modem from adverse weather conditions! Advantages: Universal antenna with excellent gain and operating in all high-speed standards Reliable fastening of the modem in the box Quality connectors for connection of modem and antenna Quality adapters with minimal losses Hermetically sealed Hardy and ultrafiol case material The possibility of repeated Assembly and disassembly of the box All set to launch the modem

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.

Features Compact circularly polarized patch feed for small dishes Top notch performance Focus and easy manufacturing and low tolerance sensitivity Feed it in quadrature for circular polarization Also an excellent choice for linear polarization in deep dishes ,use each port separately for linear polarization Suitable for f/D from 0.28 to 0.45 covered in two variants Comprising a choke(baffle) structure as well as a Beam Forming Ring(BFR) ,,,by SM6FHZ Swedish EME

,,,so...!!!

,,,pictures in detail for one ...