Changes between Version 8 and Version 9 of Hardware/lDirAnt


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Timestamp:
Sep 28, 2016, 1:27:54 PM (8 years ago)
Author:
seskar
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  • Hardware/lDirAnt

    v8 v9  
    77=== !WiFi Antennas ===
    88
    9 Most of the internal !WiFi devices are attached to dual band, blade style omni-directional antennas shown in Figure 1. These are mounted at the end of the two rods extending at the 45 degree angle downwards from the node harness as shown in Figure 2 with the distance between the two antenna rods (i.e. two WiFi devices) of 26 inches.
     9Most of the internal !WiFi devices are attached to dual band, blade style omni-directional antennas shown in Figure 1. These are mounted at the end of the two rods extending at the 45 degree angle downwards from the node harness as shown in Figure 2 with the distance between the two antenna rods (i.e. the two internal !WiFi devices) of 26 inches.
    1010
    1111 || [[Image(Ant1.png, width=400, caption="Figure 1")]] || [[Image(NodeWiFi.png, width=400)]] ||
    … …  
    1717Number of SDR units in the grid have [[attachment:Ant2.pdf multi-band (i.e. multi-standard) antennas]] covering most of the WiFi and 4G bands. They are mounted on the square plate about 12 inches apart (in horizontal plane) as shown in Figure 4.
    1818 
    19 || [[Image(Ant2.png, width=400)]] || [[Image(MountingPlate.png, width=400)]] ||
     19 || [[Image(Ant2.png, width=400)]] || [[Image(MountingPlate.png, width=400)]] ||
    2020
    2121=== Electronically Steerable Antennas ===
    … …  
    23234 nodes with USRP X310 devices in addition to standard antennas (WiFI for two internal devices and multi-standard paddle antennas) are equipped with a electronically steerable antenna and a block of RF switches facilitating antenna selection.
    2424
    25 The antenna is
    26 
    27   ||  [[Image(DirAnt-1.0.jpg, width=400)]]  ||  [[Image(ESA.jpg, width=400)]]  ||
    28 
    29 The bank of switches is used to route both !WiFi node antenna and can be directly configured as follows if the standard available configurations are not sufficient (blanks indicate the particular switch state does not matter).
    30 
    31   ||'''Configuration'''||'''SW 1'''||'''SW 2'''||'''SW 3'''||'''SW 4'''||
    32   ||Node Wifi 0 -> standard antenna||RF 1|| || || ||
    33   ||Node Wifi 0 -> directional (FCI antenna)||RF 2||RF 1|| || ||
    34   ||USRP RF A -> standard antenna|| || ||RF 1|| ||
    35   ||USRP RF A -> directional (FCI antenna)|| ||RF 2||RF 2|| ||
    36   ||USRP RF B -> standard antenna|| || || ||RF 1||
    37   ||USRP RF B -> omni (FCI antenna)|| || || ||RF 2||
     25The 2.4-2.5 GHz [[http://www.fidelity-comtech.com/wp-content/uploads/SpecSheet_FCI-3740.pdf Fidelity Comtech FCI-3740 Phased Array]] device actually comprises of:
     26 * Directional antenna with 14.5 dBi of gain and 127 electronically selectable antenna patterns
     27 * Omni-directional 9 dBi antenna
     28 * Embedded GPS
     29The antenna is managed through
    3830
    3931==== Antenna Switching Hardware ====
    4032
    41 [wiki:Software/eAM/sDA Directional Antenna AM] Service is used to manage the antenna switchbox and select which antenna is connected to respective wireless device.
     33The antenna switching hardware is shown in Figure 6. It consist of: bank of RF switches, RS-485 drivers and ''Raspberry PI'' as an embedded controlled. This hardware enables remote antenna selection and steering.
    4234
     35 ||  [[Image(DirAnt-1.0.jpg, width=400)]]  ||  [[Image(ESA.jpg, width=400)]]  ||
     36
     37The bank of switches is used to route both nodal !WiFi and X310 antenna feeds to either regular antennas or to directional or omni-directional antennas on FCI-3740. The table below shows switch states and corresponding antenna selections (blanks indicate the particular switch state does not matter).
     38
     39 ||'''Configuration'''||'''SW 1'''||'''SW 2'''||'''SW 3'''||'''SW 4'''||
     40 ||Node Wifi 0 -> standard antenna||RF 1|| || || ||
     41 ||Node Wifi 0 -> directional (FCI antenna)||RF 2||RF 1|| || ||
     42 ||USRP RF A -> standard antenna|| || ||RF 1|| ||
     43 ||USRP RF A -> directional (FCI antenna)|| ||RF 2||RF 2|| ||
     44 ||USRP RF B -> standard antenna|| || || ||RF 1||
     45 ||USRP RF B -> omni (FCI antenna)|| || || ||RF 2||
     46
     47The embedded controller is used to provide IP/http based remote management. [wiki:Software/eAM/sDA Directional Antenna AM] Service is used by experimenters to manage the antenna selection and steering.
     48