Evolution of Microwave and Optical Communication
This Guest lecture session introduces the student to the course is designed to provide an overview of the fundamental principles associated with antennas and microwave Communication, topics of Evolution of Antenna and Wave Propagation with the inclusion of laboratory demonstrations. Developments in Antennas and wave propagation date back to 1960s at a time when glass fibers and lasers were invented. Initially, the fiber attenuation was extremely high (> 1000 dB/km) but was dramatically improved to 20 dB/km by Corning Glass Works in 1970.
The topics covered are:
- Wireless communication
- Isotropic antennas
- Omnidirectional antennas
- Symmetric Antennas
- Directional antennas
- Application-oriented
Wireless communication has become an integral part of all our lives. This teGhnology seamlessly helps us get in touch with our loved ones, get our work done, and stay updated on all the happenings across the globe. But, did you ever sit back and think about how is this happening?
An antenna is just a metal conductor. It is just an array of wires that used in transmitting and by receiving signals just by changing the design. Today, wired communication helps people to communicate between'large distances, unlike ever before.
Iso = same; Tropic = different directions Isotropic antennas emit radiation uniformly iii all directions. It's like a point source radiating uniformly in all directions
An antenna is an array of conductors (elements), electrically connected to the receiver or transmitter. Antennas can be designed to transmit and receive radio waves in all horizontal directions equally (omnidirectional antennas), or preferentially in a particular direction (directional, or high-gain, or "beam" antennas). An antenna may include components not connected to the transmitter, parabolic reflectors, horus, or parasitic elements, which serve to direct the radio waves into a beam or other desired radiation pattern. Strong directivity and good efficiency when transmitting are hard to achieve with antennas with dimensions that are much smaller than a hall wavelength. Antennas can be classified as omnidirectional, radiating energy approximately equally in all horizontal directions, or directional, where radio waves are concentrated in some direction(s). A so-called beam antenna is unidirectiona\ designed for maximum response in the direction of the other station, whereas many other antennas are intended to accommodate stations in various direGtions but are not truly omnidirectional. Since antennas obey reciprocity the same radiation pattern applies to transmission as well as reception of radio waves. A hypothetical antenna that radiates equally in all directions (vertical as well as all horizontal angles) is called an isotropic radiator; however, thèse cannot exist in practice nor would they be particularly desired. For most terrestrial communications, rather, there is an advantage in reducing radiation toward the sky or ground in favor of horizontal direction(s). A dipole antenna oriented horizontally sends no energy in the direction of the conductor — this is called the antenna null — but is usable in most other directions. A number of such dipole elements can be combined into an antenna array such as the Yagi—Uda in order to favor a single horizontal direction, thus termed a beam antenna Summary Report on topic titled “Evolution of Antenna and Wave Propagation” The session started at 11 AM with introducing the speaker Mr M Srinivasa Rao Associate Professor, department of Electronics and Communication Engineering. Joginpally B. R Engineering College, Hyderabad, Telangana India 500075, and the speaker has started the session with the importance of Evolution of Antenna and Wave Propagation explains the concept of Optical Communication to increase their access to the curriculum or job and improves their performance. Mr M Srinivasa Rao concluded the guest lecture session with what is importance of Evolution of Antenna and Wave Propagation. The session ended with vote of thanks
