High frequency waves have shorter wavelengths and vice versa
Longer wave wave waves such as radio waves have low energy; This is why we can listen to the radio without any harmful consequences. Short wave waves such as X -rays have higher energy that can be dangerous for our health.
The high frequency has a short wavelength and it can be disturbed by the environment easily, but not true for all supports. The low frequency has a long wavelength and can differ around an obstruction and can transport for a longer distance (again not true for all supports). This is very similar to taking a right thread and a rolled thread and trying to pass them through a hole. It is obviously easier to pass a right thread than a wire rolled up.
High frequency waves transport more data than low frequency wave because the amount of data that can be transmitted, which is bandwidth, is directly proportional to the frequency of the wave. A high frequency wave has essentially more rope shakes and can transport more data at the same time compared to a low frequency wave. In short, longer wavelengths travel further but transport less information; The shorter wavelengths have shorter ranges but can transport more information.
Longer wavelengths have lower frequencies; The shorter wavelengths have higher frequencies. (For reference, the very low frequency wavelengths (ELF) measure more than 100,000 km long and complement only a few cycles, or even lower, per second, hence the “extremely low” frequency. Gamma rays are about a billion billion meters long (peak) and complete 300 cycles of Quintill All these waves move at the speed of light (almost).
High frequency low frequency radio wave spectrum
The wavelengths of the radio wave can vary from 1 mm to 100 km. A high frequency signal requires a lower antenna length which is crucial for mobile phones. However, high frequency signals are more sensitive to reflection and will find it difficult to go through walls and obstructions. But, they can sink through holes the wavelength.
The frequency and power determine the sizes of the cells
Higher frequencies (more Hertz) in the spectrum are able to transport more information per second than lower frequencies, but are not as reliable as lower frequencies over longer distances. Thus, although higher frequencies can serve more customers per cell, these cells are smaller than cells using lower frequencies. This means that, as bearers use increasing portions of the spectrum (it will be important when we go to 5G), the size of the cells decreases, causing more cells and more antennas. The size of the cells also depends on the power of the transmitter, so there may be smaller or larger cells for a given frequency band. Cells using a small strip should be quite small, as millimeter waves work better in short -range environments in terms of vision.
The power decreases by the distance square while a signal radiates in space, the loss of path also increases by the square of distance traveled. For example, if you transmit two equal power signals, one to 1 GHz and a second signal to 2 GHz, the 2 GHz signal will fade in noise at a faster 4x rate (1 / (2 ^ 2)) that the 1 GHz signal, and will travel 1/4 until it collapsed in noise.
For shorter wireless links, their maximum power is limited by the FCC, which helps prevent wireless systems from interfering with each other and with other systems using the same parts or similar spectrum. However, these shorter wireless technologies use license spectrum, so individual devices such as your domestic router or wireless helmet can operate anywhere without obtaining FCC authorization. Bluetooth uses a narrow strip at 2.4 GHz, while WiFi (the marketing name commonly used for a wireless local network (WLAN), operating according to the IEEE 802.11) protocol uses a few different strips. Communications in the near field (NFC) are similar, but even shorter (generally only a few centimeters), and support things like contactless payment systems.
Radio waves are modulated using AM and FM
Modulation is an electrical technique to impose information, such as speech, music, an image or data, on a radio-frequency carrier wave by modifying one or more properties of the wave in response to an intelligence signal. Amplitude, frequency, phase, pulse sequence and pulse length are the most regular properties.
Radio signals are released using AM (or amplitude modulation) and FM (or frequency modulation). Electromagnetic waves are used to transfer data in both cases. The amplitude of the signal or carrier delivered is modulated (changing) according to the information sent, but the frequency remains fixed. This contrasts with FM technology, which codes for information (music) by modifying the frequency of the wave while keeping the constant amplitude.
AM has an sound quality lower than FM, but it is cheaper and can be diffused on longer areas. Because it has a smaller bandwidth, it can accommodate more stations in any range of frequencies. Compared to AM, the FM is less sensitive to interference. Physical obstacles, on the other hand, have an influence on FM transmissions. The bandwidth allocated to an FM station is 150 kHz, 15 times that of an AM station. This explains why the music rings so much better on FM because an FM station can send 15 times more information than an AM station.
I hope it's useful, thank you.
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At Learnopoly, Finn has championed a mission to deliver unbiased, in-depth reviews of online courses that empower learners to make well-informed decisions. With over a decade of experience in financial services, he has honed his expertise in strategic partnerships and business development, cultivating both a sharp analytical perspective and a collaborative spirit. A lifelong learner, Finn’s commitment to creating a trusted guide for online education was ignited by a frustrating encounter with biased course reviews.