# Overlap zone

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{{Short description|Zone where radio signals of the same frequency can be received}}
{{More citations needed|date=April 2023}}
In [radio frequency engineering](/source/radio_frequency_engineering), an '''overlap zone''' occurs where signals from two or more [radio station](/source/radio_station)s, transmitting at the same frequency, can be received with comparable intensity.<ref>{{cite web | url=https://www.semanticscholar.org/topic/Overlap-zone/1341301 | title=Overlap zone &#124; Semantic Scholar }}</ref> [Interference](/source/Co-channel_interference) occurs frequently in such a zone.<ref>{{Cite web |url=https://www.semanticscholar.org/topic/Overlap-zone/1341301 | title=Overlap zone |access-date=2023-04-02 |website=www.semanticscholar.org}}</ref>

In order to avoid this, a receiver with [directional antenna](/source/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](/source/single_sideband).{{citation needed|date=December 2022}}

With [digital radio](/source/digital_radio) ([Digital Radio Mondiale](/source/Digital_Radio_Mondiale) and [Digital Audio Broadcasting](/source/Digital_Audio_Broadcasting) being two common types), there is no interference in the overlap zone.<ref>{{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}}</ref>

==References==
{{Reflist|2}}

1 - Multifunctional Ultrawideband Antennas Trends, Techniques and Applications By Chinmoy Saha, Jawad Y. Siddiqui, and Yahia M.M. Antar - 2019. P.3 - P.11 - P.46, 47 - P.65.

{{DEFAULTSORT:Overlap Zone}}
Category:Broadcast engineering
Category:Radio resource management

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Adapted from the Wikipedia article [Overlap zone](https://en.wikipedia.org/wiki/Overlap_zone) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Overlap_zone?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.