The radio spectrum click here for its full range is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz Terahertz).
Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication.
AM frequency band in Australia: 531 to 1602 KHz (Kilohertz)
Within Australia, the standard AM band transmitting frequencies of 531 to 1602 kHz are designated as the Broadcasting Services Band (BSB), while 1611 to 1701 kHz is designated as the "Mid-Frequency" band. A limited number of stations operate under commercial licences on 1611, 1620 and 1629 kHz.
Shortwave frequency band: 3–30 MHz (Megahertz)
Short waves directed at an angle into the sky can be reflected back to Earth at great distances, beyond the horizon. This is called skywave or "skip" propagation. Thus shortwave radio can be used for communication over very long distances.
Shortwave broadcasts of radio programs played an important role in the early days of radio history. In World War II it was used as a propaganda tool for an international audience. The heyday of international shortwave broadcasting was during the Cold War between 1960 and 1980.
Today shortwave remains important in war zones, such as in the Russo-Ukrainian war, and shortwave broadcasts can be transmitted over thousands of miles from a single transmitter, making it difficult for government authorities to censor them. SW is often used by airplanes.
FM frequency band: 87.5 to 108 MHz
Also known as VHF Band II
VHF stands for “Very High Frequency”
VHF ranges from low band (49-108 MHz) to high band (169-216 MHz)
Australian TV
It used the PAL System (equivalent to 720 x 576 pixels) up until 2001. In that year
PAL Scan Lines: 625
PAL Horizontal Frequency: 15.625 kHz
Field Rate (frames per second): 25
Vertical Frequency: 50 Hz
Video bandwidth: 5MHz
1956 - 2013 | Video | Audio |
|---|---|---|
| 0 | 46.25MHz | 51.75MHz |
| 2 | 64.25MHz | 69.75MHz |
| 7 | 182.25MHz | 187.75MHz |
| 9 | 196.25MHz | 201.75MHz |
| 10 | 209.25MHz | 214.75MHz |
| Digital Channels Since 2001 | Callsign | Frequency |
|---|---|---|
| Seven | BTQ6 | 177.50MHz |
| SBS since 2013 | SBS7 | 184.50MHz |
| Nine | QTQ8 | 191.625MHz |
| Ten | TVQ11 | 219.50MHz |
| ABC | ABC12 | 226.50MHz |
UHF stands for “Ultra High Frequency”
UHF can range from low band (378-512 MHz) to high band (764-870 MHz) with frequencies above 900 MHz at Microwave Range (Satellite Bands).
CB Radio (Citizens Band)
There are 80 Channels of free UHF CB Two Way Radio Channels that have been set aside for the general public to use. These frequencies are in the UHF Band between 476.4250 and 477.4125 MHz. Any frequencies outside of this band are for COMMERCIAL USE ONLY and all need to be licenced.
Mobile Phones Australia
Australian phone networks are built using multiple frequencies, and not all frequencies are available in every location. The network frequencies used in rural areas are often completely different to those used in the city.
2G 900, 1800 MHz N/A since 2017
3G 850, 900, 2100 MHz Closing in 2024
4G 700, 850, 900, 1800, 2100, 2300, 2600 MHz
5G 700, 850, 1800, 2100, 2300, 3500 MHz, 26 GHz (Gigahertz) with 3500 MHz (n78) the main 5G Band.
Notes on Microwave (1 GHz to 300GHz)
Microwaves fall between radio waves and infrared radiation.
Two microwave frequencies are authorized for use in microwave ovens: 900 MHz (industrial) and 2560 MHz (normal).
It seems that 2.4 GHz is the natural frequency of the water molecule, and microwave ovens work by transmitting high levels of energy at that frequency, so as to vibrate water molecules fast enough, to cause them to heat.
Therefore a normal microwave oven uses frequencies very close to the 2.4 GHz WiFi band. But it should not interfere with WiFi due to shielding. If it does (interfere), you should repair or replace the oven. They use very powerful magnetrons and if the oven is leaking that energy, it is a health hazard for anybody who is nearby.
** End of Notes