Podcast
Questions and Answers
Match the following microwave sources with their operating mode:
Match the following microwave sources with their operating mode:
Vacuum tube based devices = density modulated mode Solid-state sources = current modulated mode Maser = laser-like mode Gyrotron = ballistic motion mode
Match the following frequency bands with their corresponding applications:
Match the following frequency bands with their corresponding applications:
ISM band = Wireless LAN protocols U-NII frequencies = Licensed long-range Wireless Internet Access 5 GHz range = Metropolitan Area Networks 3.5–4.0 GHz range = Point-to-point links
Match the following wireless protocols with their operating frequencies:
Match the following wireless protocols with their operating frequencies:
Bluetooth = 2.4 GHz IEEE 802.11a = 5 GHz range WiMAX = 3.5–4.0 GHz range IEEE 802.16 = 2 to 11 GHz
Match the following microwave communication systems with their applications:
Match the following microwave communication systems with their applications:
Signup and view all the answers
Match the following microwave devices with their operating principles:
Match the following microwave devices with their operating principles:
Signup and view all the answers
Match the following microwave frequency bands with their corresponding applications:
Match the following microwave frequency bands with their corresponding applications:
Signup and view all the answers
Match the following microwave sources with their characteristics:
Match the following microwave sources with their characteristics:
Signup and view all the answers
Match the following wireless protocols with their corresponding standards:
Match the following wireless protocols with their corresponding standards:
Signup and view all the answers
Match the following microwave applications with their characteristics:
Match the following microwave applications with their characteristics:
Signup and view all the answers
Match the following microwave frequency bands with their corresponding applications:
Match the following microwave frequency bands with their corresponding applications:
Signup and view all the answers
Study Notes
Microwave Frequencies
- Commercial implementations operate in 2.3 GHz, 2.5 GHz, 3.5 GHz, and 5.8 GHz ranges.
- MBWA protocols operate between 1.6 GHz and 2.3 GHz for mobility and in-building penetration.
Microwave Applications
- Cable TV and internet access use lower microwave frequencies.
- Mobile phone networks, like GSM, use lower microwave frequencies.
- Microwave radio is used in broadcasting and telecommunication transmissions due to its short wavelength and high spectral efficiency.
Radar and Remote Sensing
- Radar uses microwave radiation to detect range, speed, and characteristics of remote objects.
- Radar is used in air traffic control, navigation of ships, and speed limit enforcement.
Global Navigation Satellite Systems (GNSS)
- GNSS, including GPS, broadcast navigational signals between 1.2 GHz and 1.6 GHz.
Power and Energy
- Microwave ovens use non-ionizing radiation at 2.45 GHz to heat food.
- Microwave heating is used in industrial processes for drying and curing products.
- Microwaves can be used to transmit power over long distances.
Microwave Frequency Bands
- The microwave spectrum ranges from approximately 1 GHz to 1000 GHz in frequency.
- The IEEE defines the millimeter wave band as 110 GHz to 300 GHz.
Microwave Sources
- Vacuum tube-based devices operate on ballistic motion of electrons in a vacuum.
- Solid-state sources include field-effect transistors, tunnel diodes, and Gunn diodes.
Communication
- Microwave point-to-point links were used for long-distance telephone calls before fiber optic transmission.
- Frequency division multiplex was used to send up to 5,400 telephone channels on each microwave radio channel.
- Wireless LAN protocols, such as Bluetooth and IEEE 802.11, use microwaves in the 2.4 GHz ISM band.
- Licensed long-range Wireless Internet Access services operate in the 3.5-4.0 GHz range.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the frequencies used in wireless communication, including MBWA protocols and microwave frequencies.
