Average wifi transmit power1/21/2024 ![]() EIRP is a measurement that takes antennas and antenna leads into account. "RF Pwr" is "Radio-Frequency Power", which might make you think it's the same kind of measurement as Apple's "radio output power", but then Linksys qualifies it with "(EIRP)". So without any antenna information from Apple, you can't quite compare it to the example you gave of the Cisco-Linksys E1000, which only gives you these numbers: RF Pwr (EIRP) in dBm: 17.5 dBm This doesn't tell you how the antennas and antenna leads affect the power output, or how that 100mW of power gets split up amongst the multiple radio chains inherent in 802.11n, or how the power varies per band or channel (and the power usually does vary per band and channel due to regulatory requirements and antenna characteristics). But a "radio output power" is probably a measure of the signal strength at the antenna connector inside the unit. Among the vendors that do publish some information, different vendors often publish different kinds of information related to signal strength, and the information they give is not always directly comparable.įor example, all Apple says about their current AirPort Extreme 802.11n (Simultaneous Dual-Band II) Wi-Fi router is "Radio output power: 20 dBm (nominal)". I just went to the websites for D-Link, Netgear, and TRENDnet, and couldn't find any radio power information at all on the spec sheets I checked for some of their latest-and-greatest Wi-Fi routers. The difficulty in comparing spec sheets even for raw signal strength is that many vendors don't publish any signal strength related measurements at all. Instead you should look for professional reviews where rate-vs.-range (performance at various ranges) was carefully measured by an expert. It is never possible to tell which will give you the best range or performance-at-range just by reading the spec sheet. In many - if not most - cases, it is not possible to compare vendors' published spec sheets between consumer Wi-Fi products and determine which will give you the greatest raw signal strength.
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