This using the IEEE standard for radio bands if that wasn’t apparent
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With IEEE designation
UHF= 300MHz to 1000 MHz or if you like 0.3 GHz to 1 GHz.
300-300MHz is just a frequency 300MHz, if there no prefix or another prefiz on the fiest it would be 300 Hz or 300kHz
I can find IEEE 521-2019 – IEEE Standard Letter Designations for Radar-Frequency Bands for free online I only found the 2002 version and is range starts at HF 3-30 MHz and VHF 30-300MHz. There might be IEEE bands for the lower frequency of 300 Hz and 300kHz in other standards but I did not find them.
So two errors 30-300 MHz not 300-300 MHz and VHF not UHF, IEEE and ITU agree on HF and VHF, it is at higher frequencies the do not agree.,
The next IEEE band is the L band at 1-2 GHz that directly follows UHF
3000-9999MHz = 3GHz to 9.999GHz is the even higher frequency in the S C and X bands, not between UHF and L
SHF is not a part of the IEEE standard or at least the sources I can find. Super high frequency (SHF) is an ITU designation of 3 GHz to 30 GHz but I can find it as an IEEE destination. 1-2GHz is still ITU UHF, the use 0.3-3GHz not the IEEE 0.3-1 GHz
So you are not using IEEE standards for radio bands but the incorrect frequency of name and mix in some ITU
so there is nothing between IEEE UHF and L band they meat at 1 GHz
Here is IEEE band designations [https://www.microwaves101.com/encyclopedias/frequency-letter-bands](https://www.microwaves101.com/encyclopedias/frequency-letter-bands) notice SHF is not there
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