We all know that UHF international frequency band is [300_3000 MHZ] so why in some aircraft radios we found that UHF band is from 225 to 400MHZ? - Quora
![radio communications - What are the reasons for the particular range of VHF and UHF frequencies? - Aviation Stack Exchange radio communications - What are the reasons for the particular range of VHF and UHF frequencies? - Aviation Stack Exchange](https://i.stack.imgur.com/zXK4Z.jpg)
radio communications - What are the reasons for the particular range of VHF and UHF frequencies? - Aviation Stack Exchange
![Electromagnetic (EM) Spectrum 1. Medium Frequency (MF), High Frequency... | Download Scientific Diagram Electromagnetic (EM) Spectrum 1. Medium Frequency (MF), High Frequency... | Download Scientific Diagram](https://www.researchgate.net/profile/Osahenvemwen-Austin/publication/349701414/figure/fig1/AS:996638680162305@1614628586531/Electromagnetic-EM-Spectrum-1-Medium-Frequency-MF-High-Frequency-HF-Very-High_Q640.jpg)
Electromagnetic (EM) Spectrum 1. Medium Frequency (MF), High Frequency... | Download Scientific Diagram
![Table I from Radio frequency radiation evaluation of transmitting devices in VHF/UHF band | Semantic Scholar Table I from Radio frequency radiation evaluation of transmitting devices in VHF/UHF band | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/2bb44a2bc1f2b7fb39568be4c2b7fd2b0067b418/2-TableI-1.png)