overlap zone

{{Short description|Zone where radio signals of the same frequency can be received}}

{{More citations needed|date=April 2023}}

In radio frequency engineering, an overlap zone occurs where signals from two or more radio stations, transmitting at the same frequency, can be received with comparable intensity.{{cite web | url=https://www.semanticscholar.org/topic/Overlap-zone/1341301 | title=Overlap zone | Semantic Scholar }} Interference occurs frequently in such a zone.{{Cite web |url=https://www.semanticscholar.org/topic/Overlap-zone/1341301 | title=Overlap zone |access-date=2023-04-02 |website=www.semanticscholar.org}}

In order to avoid this, a receiver with directional antenna is used, which can then be aligned in such a way that it will only receive the signal of one transmitter. Alternatively, the signals could be separated using a demodulator in single sideband mode.{{citation needed|date=December 2022}}

With digital radio (Digital Radio Mondiale and Digital Audio Broadcasting being two common types), there is no interference in the overlap zone.{{Cite web |title=Why don't radio stations interfere with each others broadcasts? |url=https://www.physicsforums.com/threads/why-dont-radio-stations-interfere-with-each-others-broadcasts.307249/ |access-date=2023-04-02 |website=Physics Forums {{!}} Science Articles, Homework Help, Discussion |date=14 April 2009 |language=en-US}}