Applications of Microwaves

Microwaves are a type of electromagnetic radiation. They have wavelengths ranging from about one meter to one millimeter. Their frequencies range between 300 MHz (0.3 GHz) and 300 GHz. They play an important role in modern daily life. In this article, we are going to learn the uses of micro-waves in daily life.

Microwaves are a type of electromagnetic radiation with wavelengths ranging from one meter to one millimeter. They have frequencies between 300 MHz (0.3 GHz) and 300 GHz.

• Microwaves were first discovered by James Clerk Maxwell in the 19th century. They were later experimentally verified by Heinrich Hertz in the late 1880s.
• Microwaves have lower energy compared to visible light and X-rays.
• They can travel through the atmosphere, making them useful for various types of wireless communications.

The applications of microwaves are mentioned below:

Food Preparation

Microwaves can be used to quickly reheat food or do it from the beginning thanks to a short period that is required as compared to baking or cooking foods in an oven. Microwave ovens’ more accurate cooking time and power level add extra value in hectic daily schedules and busy environment.

Example: In this process, we put food inside a microwave oven exposes it to a set of electromagnetic waves at the frequency of microwaves (2.45 GHz). These waves at these frequencies make water molecules present in food to vibrate. The internal heating of food is caused by this vibrating molecule. This uniform, intense heating leads in a considerable decrease of the cooking time as compared to the regular cooking devices (e.g. cooking stove, ovens).

Communication Systems

The microwave medium is the vehicle that allows data transmission (data transmission) over large distances in the modern communication systems. Microwaves transportation transmission towers and satellites allow for broadcasting TV, radio, cell and internet networks. The capability for big data carriers in higher speeds is proven to be a vital thing for the world to improve globally the communication process.

Example: Microwave networks are commonly used to connect a base station, in an isolated as well as remote area, with the main network of a cellular network where a long fiber optic is not a convenient option. Under this subheading, microwave link could provide the example of an affordable solution for network coverage extension in the areas of hard terrain. Satellite communications technology is based on using microwave signals to send data to the ground stations and from satellite which is located around Earth. That achieves air to ground communication in mission-critical, theater setting, voice, video, and data services which covers the entire globe.

Medical Diagnostics and Treatment

Microwave, as a diagnostic imaging tool, is utilized across the medical field. The most common ones being magnetic resonance imaging (MRI) and computed tomography (CT) scan. Along with that, microwave ablation has been employed to manage the medical conditions inclusive of cancer. The ability to pinpoint only those tissues that carry the disease while minimizing the adverse impact on the neighboring healthy tissues, offered by the microwave-based therapies, suggests that patients have a significantly less invasive but more effective alternative to existing treatment methods.

Example: In magnetic resonance imaging (MRI), the listeners of radiofrequency (RF) pulses at microwave frequencies is used to excite the hydrogen atoms in the body, as a result, it can provide detailed images of the internal organs and tissues. Microwave ablation refers to the use of focused microwave energy that heats and kills the cancerous tissue while destroying the surrounding tissues as little as possible. It is most non-invasive technology that is being used for treatment of liver, lung and kidney cancers and represents for patients a complementary non-surgical modality.

Radar Systems

Radars have been designed to work with microwaves as a result and having these waves helps in object detection and tracking in various Nearby regions. Weather forecasting, air traffic control, and military surveying are the illustration of how radar technology is applied to monitoring and pivotal role to aviation and shipping safety as well to even protecting the security in defense operations.

Example: Weather radars scan through microwave pulses to provide suicides such as volume of precipitation, the movement of storms, and early adverting of severe weather like thunderstorms, hurricanes and tornadoes. Air traffic control radars use microwave, which tracks the position and move for airplanes to avoid any accident and better air travel. The use of microwave technology is perfected by military lasers for surveillance, reconnaissance, and missile guidance systems to detect and track danger sources and improve defensive capabilities.

Material Processing and Manufacturing

Currently industrial processes are being more processed with microwave technology for ripening, curing, and drying of many diverse materials. The area of appliances manufacturing from which ceramics and plastics to composites and polymers is apprehended by the use of microwave technology, and the reduction of processing times as compared to the traditional heating methods is the proof of high energy efficiency and lower costs and the implication of improved productivity during manufacturing processes.

Remote Sensing and Earth Observation

Such microwave sensors are added to satellites. By means of them we can monitor various things on a distance, such as the surface of the Earth and atmosphere, or oceans. This sensor for instance is useful in informing weather patterns, environmental care, agriculture and disaster control thus enabling scientific and governmental agents to make the right decisions in the face of global calamities like climate change and natural disasters.

Astronomy and Astrophysics

In the astronomy sector, the space telescopes equipped with microwave detectors allow scientists to probe the structure of cosmic microwave background radiation and understand how the universe evolved during the first moments of its show. The astronomers can make a comparison between microwave emissions and celestial objects using electromagnetic spectrum to study stars forming, compression of galaxies, and black holes’ characteristics.

Also, in the instance of the microwave-driven drying technique, it is employed in both pharmaceutical and chemical fields for drying powders, granules, and bulk materials with the advantage of energy saving and precision control over the content of humidity.

Also, Check

• Applications of Physics in Engineering
• Applications of Physics in Materials Science
• Applications of Physics in Electronics

What is the functioning of microwave ovens?

Microwave ovens is used to heat food by electromagnetic waves. In this, microwave cause water molecules to vibrate thus heating and cooking the food

Can microwaves be considered safe appliance?

Yes, microwaves are considered safe but overexposure can harm humans

How is microwave different from radio waves?

The difference between microwave frequencies and the other types of electromagnetic radiations such as radio waves by is due to wavelength, frequency, and applications.

What are applications of microwave in medical industry?

In medical field, microwave technology is used in multiple applications, e.g., MRI imaging, microwave ablation therapy, and localized heating of tissues by hyperthermia therapy.

Can microwave become a tool in industrial processes?

Microwaves are used in manufacturing and material processing that include instances such as drying, curing, and heating in different industries, through food processing, automotive manufacturing or pharmaceutical and chemistry ones.