Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Admin

Administrators
  • Content count

    3970
  • Joined

  • Last visited

Everything posted by Admin

  1. NITSA-1 Antenna or Ceiling Antenna....???!!!
  2. Below are the usual model of omnidirectional antena for 2,4GHz( Ceiling Mount Antenna)
  3. Main technical specifications 1. Frequency Range: 2400MHz 5G 5800mhz 2.VSWR:<= 1,5 3. Gain: 10 dBi (max.) 4. Vertical polarization 5. Maxlmum Input Power: 50W 6. Connector Type: RP-SMA plug/SMA plug 7. Length: 19.5 cm 8. It is widely used for wireless transmitter and wireless receiver. Such as AP, WLAN ,WIFI router, WIFI adapter. 9. Advantage: Nickel-plated has excellent quality in solubility, conductivity and stability in metal. 10. It has two colors, you choose black or white. Thanks.
  4. ,,no, for this you need other dimensions...!!! ,,see the first post...!!!
  5. Ultimately, when the K3TZ design was tested, the ease of construction and consistency of results demonstrated the worth of this antenna. That is why when I actually found a design, I decided to learn as much as I could about it. I found some patch antenna that will allow you to design and simulate a patch antenna and entered this design. the Axial Ratio,,, By applying a cut in the patch, increase the bandwidth width and uniformize the impedance This is the simulation on the original antenna
  6. 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.
  7. TP-Link CPE510/520 is a 5 GHz outdoor access point similar to Ubiquiti NanoStations. There is also a 2.4 GHz Version of this AP, the TP-Link CPE210/220. The device has a built-in 13 dBi 2x2 dual-polarized directional MIMO antenna with a beamwidth of 45° (H-Plane) and 30° (E-Plane). Installation 1,Connect the TP-Link CPE510 with your computer via ethernet 2,Set the IP address of your computer to 192.168.0.10 with a subnetmask of 255.255.255.0 3,Open your browser, go to https://192.168.0.254 and accept the invalid certificate 4,Log in with user "admin" and password "admin", change the password in the next step 5,Go to the "System" tab and upload the OpenWrt firmware in the "Firmware Update" section and select "Restore" in the dialog promted the filename is limited to a length of 68 characters (as of: "1.3.0 Build 20150612 Rel. 50997", the real limit seems to be 80 characters - including the implicite prefix "C:\fakepath\") 6,Follow official OpenWrt setup instructions (e.g. IP address of the device is now 192.168.1.1)
  8. ...yes, but I don't really trust the gain of the antenna..!!!
  9. 4G antenna BDM-2 is a wave channel with crack initiation, and the delay line is made of sequentially installed disk elements. Compared to the classical antenna BDM , new directional antenna BDM-2 is: More gain; Improved radiation pattern; More stable operating parameters; Greater reliability; Superior mechanical characteristics. Due to the small weight, a small sail and streamlined shapes, the antenna BDM-2 can be used in almost any climatic conditions. And corrosion-resistant materials of the antenna will ensure a long maintenance-free operation even in the marine climate. Specifications 4G/LTE antenna BDM-2: Antenna type Directed Beam width H/V ° 20/20 Frequency range, MHz 2600 MHz Polarization Linear orthogonal Gain, dBi 15-17 DBi depending on frequency of execution The CWS in RAB. the frequency range, not more 1.5 Max. input power,W 50 The weight of the antenna package, gr. 910 Input impedance, Ohm 50 Overall dimensions, mm Ф90 x 500 The operating temperature range, °C -40 .. +60 Performance All-weather, all - Connector (on the case) N-female x2
  10. Here are some quick notes about the parabolic type dish antennas you might find. The actual antenna is a normal half wave dipole with an integrated balun and is located inside the sealed plastic cover. The mesh screen is the reflector which concentrates the RF energy onto the antenna. That is how dish antennas increase the received or transmitted power level. Also, wireless cable service providers frown upon giving away their used dishes as they think you're going to steal cable service.
  11. ,,,okay, I will try...for the frequency of 1800 MHz...??/
  12. ,,, for the impedance of 75 Ohm, the distance of 7 mm must be modified...!!!
  13. I don't really think so, it has to be checked...!!!
  14. Antennas are essential wherever wireless communication required. They are the indispensable link between the contained signal and the “ether”. CST provides a variety of tools for each stage of the antenna design flow to study and improve your design. Antennas are used in a vast variety of applications, and thus take come in a vast variety of form factors and radiation mechanisms. The range of simulation methods in CST MWS allows the engineer to choose the best technique for each application. The transient solver could be best for wideband or planar antennas, the frequency domain solver may be more suitable for electrically small antennas, while the integral equation solver can efficiently simulate electrically large or wire antennas. Antennas never operate in isolation, but are attached to a feed network. CST DESIGN STUDIO™ (CST DS) allows the hybrid co-simulation of the effect of an attached circuit on the antenna performance. Installation of an antenna in a device or on a platform makes its analysis even more complex. The System Assembly and Modelling framework in CST DS allows the user to set up coupled simulations which can combine different solvers automatically by making use of field sources. Finally, powerful automated post-processing allows you to extract every magnitude of interest for an antenna designer – nearfield plots, SAR, phase center, directivity or farfield gain for single antennas or arrays - and to process those data further for use in parameter sweeps or optimizations in order to improve the performance of your design. Few pictures started...
  15. If your model is symmetric, you may define this symmetry planes here. For particle tracking calculations the symmetry option can only be applied if no space charge and particle current is monitored. Therefore symmetry conditions cannot be applied for gun-iteration calculations. Important: It is necessary to create the entire structure first. Every symmetry plane you find reduces the calculation time by a factor of 2, so it is always recommended to specify symmetries, if any exist. The type of the symmetry can be either electric or magnetic. f you specify a symmetry plane, the calculation domain is cut in half. The picture on the right shows a calculation domain symmetric to the YZ plane. The symmetry type is electric. The calculation domain is cut in half twice more if a symmetry type for the XZ and XY can be found.
  16. ,,, with other caps, this can also be done... 2.3-2.7 GHz frequency band (UWB)
  17. Coffee Amigo Cap as Panel Antenna What can be done with 4 COVERS instant coffee...!!!
  18. ,,or a Batwing antenna.... ....with a parasitic circular director....!!!!
  19. Of course, with a bucket we are trying to "step twice into the same river". Discussion metal bucket as the horn has already been discussed on the internet. It is obvious that to draw energy from the twice same amount of space is impossible. Please note that the effectiveness of the example is superior to the dual mirror system and is comparable with them on bandwidth supports. Use galvanized buckets as the mouthpiece, which probably can be discussed in detail . And in this example, dispelled some myths. In particular, square (rectangular) patch element easier to manufacture at home, allows you to easily build wideband antenna and can be used in circular polarization. And here are the achievements of some predecessors...
  20. 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.
  21. Universal remote panel antenna for receiving and amplifying digital TV (DVB-T, DVB-T2) and analogue (UHF) channels. Connector type - F-female. Electrical characteristics Operating frequency range, MHz 470-790 Gain, dBi 7.5-9.5 The width of the days in H-plane, degrees 59÷91 Days width in E-plane, degrees 49-80 Input impedance, Ohm 75 SWR in the frequency range, not more 1.8 Polarization vertical/horizontal/inclined Mechanical characteristics Weight with mount, g 1840 Overall dimensions without mounting, m 0.3 x 0.3 x 0.12 Connector F-female The mast diameter, mm 30÷52 The emitter material, the coating galvanized steel, plastic coating Material of protective box Polycarbonate+ABS Operating temperature range, gr. Celsius -40...+60
  22. 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.
  23. 4G 3g 2G LTE WCDMA GSM 800 900 1800 2100 2600 mhz Antenna GSM ceiling antenna for repeater or amplifier of mobile signal The Gain Is 5 DB. Coverage is not much more than that of a small pin antenna from the repeater kit (more than 1.5 times). 1-2 rooms. 5 DB. Plus (i.e. minus) the normalized signal loss at the N cable connection (if the antenna socket is connected by an extension cable).
  24. This yagi antenna it pretty simple to execute, but it is worth making an adapting loop still coping lambda / 2,by a double plated pcb circuit