Network theory and antenna notes

4. • Microwave sources are devices or systems that
generate microwaves, which are a form of
electromagnetic radiation with wavelengths
ranging from about one meter to one millimeter
(with corresponding frequencies between 300
MHz and 300 GHz).
• Microwaves are used in various applications,
including communication, radar, heating, and
scientific research.

5. • A Gunn diode, named after physicist J.B. Gunn
who discovered the effect, is a type of diode
used in high-frequency electronics.
• It is known for its ability to generate microwave
frequencies and is used in a variety of
applications such as oscillators and amplifiers in
microwave systems.

8. Drift velocity represents the average velocity at which free charge
carriers (such as electrons) move under the influence of an electric
field.

10. Microwave frequencies refer to a portion of the
electromagnetic spectrum that lies between radio
waves and infrared waves.
These frequencies range from about 300 MHz (0.3
GHz) to 300 GHz.
Microwaves have a wide array of applications in
communication, radar, and even in household
appliances like microwave ovens.