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I have 2.4 GHz radios conforming to ETSI standards with low power output. I want to increase the EIRP from 20 dB to 40 dB. What should I do?
To increase Equivalent Isotopically Radiated Power (EIRP) in a point-to-multipoint WLAN, you can either increase the power output of the radio or use existing power more effectively with a higher-gain antenna. I assume that your radio power output is fixed or already at its maximum. Therefore, your most likely solution is to add at 20 dBi (or better) directional antenna, boosting EIRP from 20 dBm to 40 dBm across a smaller service area while keeping the radio's output power constant.