Sunday, October 10, 2010

Re: [IBWiFi] Wi-Fi-antenna?

 

I'm assuming you want to use the TV antenna as a Wi-Fi antenna. If that is
the case there will be a few issues. The "Bat Wing" antenna is tuned to
operate with mediocre results from 54 MHz to 700 MHz Wi-Fi operates at
2,400 MHz (2.4 GHz) a much shorter wave length. What does this mean?
Let's start with some thing called standing wave ratio, this says that most
of the RF energy received and transmitted will be converted to heat and not
sent out on the antenna or to the receiver. To make matters worse, the "Bat
Wing" antenna has an amplifier in line with the antenna. This will
effectively block any signal transmitted, if it doesn't burn out the
amplifier and with the frequency miss match it will also block and received
frequency. There is also a miss match with the coax cable used 75 vs. 50
ohm. To say nothing of cable loss with all the miss matches. My guess your
result will be very poor, perhaps as good as not attaching an antenna at
all.

What you might want to do is attach a Wi-Fi antenna to the Bat Wing and run
coax down to the router/PC.

BTW, My background is that of an EE with a 1st Class commercial radio
license and Extra ham radio license, plus antenna design experience at UHF
frequencies, including Wi-Fi.

Good luck,

Tom Crowley
KT4XN

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From: "mario sori" <emes41@yahoo.com>
Sent: Sunday, October 10, 2010 1:55 AM
To: <InternetByWiFi@yahoogroups.com>
Subject: Re: [IBWiFi] wi-fi-antenna?

> i mean using the TV antenna as a hot-spots hooker after disconnecting any
> connections to the TV set. thx.
> none/mario
>
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> [Non-text portions of this message have been removed]
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