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#1
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WiFi Antenna.
Exactly two weeks ago on a Wednesday, I ordered an MFJ Wide Area High
Gain 1802 WiFi Antenna from www.MFJEnterprises.com (Hot New Products) Yesterday, I phoned MFJ Enterprises to check on the status of my antenna.The lady at MFJ Enterprises told me it is on back order and she will try to send it out this week. That is OK with me though, I am not in a big hurry anyway, I don't know why I ordered the antenna, sometimes I buy thingys I like and hardley ever get around to using some of them. What are some neat uses I can use my WiFi antenna for? As long as they are Legal thingys, that is. cuhulin, the WiFi Dummy |
#2
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WiFi Antenna.
In article ,
wrote: Exactly two weeks ago on a Wednesday, I ordered an MFJ Wide Area High Gain 1802 WiFi Antenna from www.MFJEnterprises.com (Hot New Products) Yesterday, I phoned MFJ Enterprises to check on the status of my antenna.The lady at MFJ Enterprises told me it is on back order and she will try to send it out this week. That is OK with me though, I am not in a big hurry anyway, I don't know why I ordered the antenna, sometimes I buy thingys I like and hardley ever get around to using some of them. What are some neat uses I can use my WiFi antenna for? As long as they are Legal thingys, that is. The first thing that you ought to do, is check the specs and literature for the WiFi radio (card, access point, etc.) you're planning to use it with. Find out whether this radio was certificated (i.e. tested for compliance by the manufacturer) with an antenna having a gain level of 8 dBi or more. If it hasn't - if the radio was only certificated with an antenna with less gain - then you cannot use the MJF antenna with the radio, and transmit, without violating the radio's Part 15 certification. You would be transmitting illegally. You could still use the gain antenna with the radio in a "receive only" mode (turning off the transmitter entirely). This could allow you to do site-surveys, "wardriving", and signal strength evaluations. If your WiFi radio was certificated with an antenna of 8 dBi or higher gain, then you can use the MJF antenna with that radio. The usual "neat uses" would be for setting up area or point-to-point links, over distances greater than what you could achieve with a lower-gain antenna (or in the face of interference, where the front-to-back and front-to-side rejection of the gain antenna would help reduce the impact of the interference). 8 dBi isn't particularly high-gain, as such things go. Even a simple dipole is around 2 dBi. The additional 6 dB of gain will roughly double the distance over which you can achieve a WiFi link. People doing long-distance point-to-point or point-to-multipoint WiFi often use gains of 19 dBi or higher... parabolic dish antennas and the like. -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#3
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WiFi Antenna.
Dave Platt wrote:
The first thing that you ought to do, is check the specs and literature for the WiFi radio (card, access point, etc.) you're planning to use it with. Find out whether this radio was certificated (i.e. tested for compliance by the manufacturer) with an antenna having a gain level of 8 dBi or more. If it hasn't - if the radio was only certificated with an antenna with less gain - then you cannot use the MJF antenna with the radio, and transmit, without violating the radio's Part 15 certification. You would be transmitting illegally. The horror... If the Wifi card has a standard connector it should be OK with an aftermarket antenna. If it has an oddball connector it must be used with a specific antenna. In any case, there is no one enforcing Part 15 compliance in the field. |
#4
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WiFi Antenna.
In article ,
dave wrote: The horror... In any case, there is no one enforcing Part 15 compliance in the field. True... it's rare, and seems to happen only after strenuous complaints. I *have* heard of it happening, though. If the Wifi card has a standard connector it should be OK with an aftermarket antenna. If it has an oddball connector it must be used with a specific antenna. That's not the intent of the FCC regulations. The FCC requires that consumer-type WiFi radios *must* use nonstandard connectors (for arguable definitions of "nonstandard"). Specifically, 47 CFR 15.203 says: An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this Section. The manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited... (snip)... the installer shall be responsible for ensuring that the proper antenna is employed so that the limits in this Part are not exceeded. Manufacturers have asked that the "unique coupling" rule be relaxed... they complain that every time they come up with a new "unique" connector (e.g. reverse-polarity or reverse-threaded versions of SMA, TNC, etc.), it rapidly becomes so popular and so easy to acquire that they have to stop using it and find a *different* new non-standard connector... lather, rinse, repeat. The FCC refused to remove this requirement, the last time that the issue was the subject of a rulemaking (although they did add the above language which permits a broken antenna to be replaced by the user... previously even this was essentially forbidden). -- Dave Platt AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
#5
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WiFi Antenna.
Dave Platt wrote:
In article , dave wrote: The horror... In any case, there is no one enforcing Part 15 compliance in the field. True... it's rare, and seems to happen only after strenuous complaints. I *have* heard of it happening, though. If the Wifi card has a standard connector it should be OK with an aftermarket antenna. If it has an oddball connector it must be used with a specific antenna. That's not the intent of the FCC regulations. The FCC requires that consumer-type WiFi radios *must* use nonstandard connectors (for arguable definitions of "nonstandard"). Specifically, 47 CFR 15.203 says: An intentional radiator shall be designed to ensure that no antenna other than that furnished by the responsible party shall be used with the device. The use of a permanently attached antenna or of an antenna that uses a unique coupling to the intentional radiator shall be considered sufficient to comply with the provisions of this Section. The manufacturer may design the unit so that a broken antenna can be replaced by the user, but the use of a standard antenna jack or electrical connector is prohibited... (snip)... the installer shall be responsible for ensuring that the proper antenna is employed so that the limits in this Part are not exceeded. Manufacturers have asked that the "unique coupling" rule be relaxed... they complain that every time they come up with a new "unique" connector (e.g. reverse-polarity or reverse-threaded versions of SMA, TNC, etc.), it rapidly becomes so popular and so easy to acquire that they have to stop using it and find a *different* new non-standard connector... lather, rinse, repeat. The FCC refused to remove this requirement, the last time that the issue was the subject of a rulemaking (although they did add the above language which permits a broken antenna to be replaced by the user... previously even this was essentially forbidden). They should just worry about the input power to the antenna. So what if I take radiation off the floor and ceiling to make it go a little farther sideways? So what if I have a narrow beam in only one direction? It reduces congestion in the directions it's not pointed in. I can understand the restriction for FM Modulators or IFB transmitters, but for a device that shares a band with microwave ovens I think the FCC better have a hundred higher priorities. |
#6
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WiFi Antenna.
My Aluratek Internet Clock Radio showed up here about a week and a half
ago. www.aluratek.com The radio requires either a wired or wireless router.Also an ethernet cable if used with a wired router, connected to a computer.I do own a Velocity Micro ProMagix desktop computer.I need to buy a router.I like Linksys products.I think I will buy a Linksys wired router. I am not interested in doing any WiFi wardriving, driving around for that purpose.I only drive to the food store and the discount tobacco store and to a vetirinary supply store for dog food for my little doggy. A few days ago, I phoned MFJ Enterprises.The lady said my WiFi antenna is on back order. cuhulin |
#7
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WiFi Antenna.
You wrote in rec.radio.amateur.antenna:
SNIP I need to buy a router.I like Linksys products.I think I will buy a Linksys wired router. I have a Linksys Model BEFSR41 4 port router that sells for $60 retail that I'll sell to you for $40 plus shipping. See: http://tinyurl.com/cgkz5b If you're interested, let me know your zip code so I can estimate the shipping costs. Henry WA0GOZ |
#8
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WiFi Antenna.
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#9
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WiFi Antenna.
joeturn wrote in
oups.com: http://www.engadget.com/2005/11/15/h...d-a-wifi-biqua d-dish-antenna/ WOW towards the end of the article, look at the gain from it? Quote "Then found 14 other WISP APs including town D, 7.8 miles away." end quote. As for the FCC, my inner self morals tell me to never let anyone regulate antena theory and or education, sure I'll go along with freq and power out control but refuse to conform to antenna regs. Accept for "Height" of course. This gadjet is impressive, and yes I love Covert WiFi conections this one is on my list of things to do. As long as I have a soldering Iron, who needs to worry about "Connector" types and models hey hey. Now for the PC flamers? We'll go ahead waist your time at will. -- May You reep the poverrty You have Voted for. |
#10
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WiFi Antenna.
--snip2save---------------
I couldn't agree more if I had to. I always whent my own way with building a BIGGER antenna. Never conciously cared about subjective law makers frowning on the intellect getting ahead. Through the use of an antenna. Now why I have a guilty concious about buying an illeagle linier amp for my cell phone or wifi? I don't know, always agreed to the morals behind power limits, but never will concider a better antenna as "More Power", it's just making better use of the power you have wich shouldn't even be counted. Come get me and my Big Dish WiFi setup, Watch out for the Pit Bulls, there are 3 of them, One of them has AIDS, you guess witch one. They should just worry about the input power to the antenna. So what if I take radiation off the floor and ceiling to make it go a little farther sideways? So what if I have a narrow beam in only one direction? It reduces congestion in the directions it's not pointed in. I can understand the restriction for FM Modulators or IFB transmitters, but for a device that shares a band with microwave ovens I think the FCC better have a hundred higher priorities. -- Quote "Get SSL VPN services now, KEEP Government OUT of your business... " |
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