Best RF Signal Strength – copy of reply to laurelton of Verizon

pts.
Tags:
802.11 networking equipment
Data Management
IT architecture
Networking
Wireless
Wireless Access Points
Wireless routers
Wireless standards
With 30 years of experience in the RF industry and having an FCC commercial license for many years and BTW, I was the Equipment Engineering Manager, NYNEX Mobile in Pearl River at Blue Hill Plaza in the old days ( 1985 - 1989 ), I can offer a few simple suggestions: If the wireless router has the capability (e.g. CISCO), make sure the dual antenna ports are split, as to: one is the Rx antenna, the other is the Tx antenna. Make sure the Tx and Rx antennae are seperated by at least 6 feet to reduce RFI. Use coaxial cable with BNC connectors, soldered type is the best. The Rx antenna should be placed in a central location (e.g. in the Hung Ceiling), away from any steel girders and concrete (concrete often contains rebar, which is steel). Look for Good Line of Sight. 2.7GHz is a very directional signal band. Restrict the use of cellular. Although we are in the 800MHz band, harmonics can reek havoc. We used to call the WTC - Hetrodyne City. If available, a spectrum analyzer should be used for the best Received Signal Strength Indicator reading from the workstations and servers for antenna placement. Tx antenna placement can be guaged by using the workstation's utility for the Wirless NIC. A room corner can deflect the signal back into the room thus enhancing the Tx signal. This depends on the wall construction, plain sheetrock will not act as a deflector. Antenna placement is critical for the Best RF signal! Rudy Schubert Consultant / Systems Engineer member of the IEEE Schubert Inc. P.O. Box 1343 Long Beach, New York 11561 rudolph@schubert.net rudolph.schubert.net tel: (516) 431-5339 mobile: (516) 510-1781

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Dear Mr. Rudy Schubert,

Being new to the field of RFID, I would have your opinion about “RFID and Patient Safety”. Is this really possible ??

I hope, I am asking the right person for advice.

regards,

Abheejeet

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  • PGHruby
    Antennae seperation is not really an issue with WIFI since it operates in a half-duplex mode. This means you can run both for Tx and Rx without performance issues. However full-duplex or multi channel systems would benefit from the configuration described.
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