Infinite wavelength resonant antennas

  • Thread starter Stanley514
  • Start date
  • #1
Stanley514
411
2
Could somebody explain what does mean "infinite wavelength antenna" and what advantages does it have? What is resonant antenna and advantages?
http://webcache.googleusercontent.com/search?q=cache:fHdO6P-aoIIJ:dspace.nitrkl.ac.in:8080/dspace/bitstream/2080/1320/1/MMET.pdf+&cd=4&hl=en&ct=clnk&gl=ca [Broken]
 
Last edited by a moderator:

Answers and Replies

  • #2
18,759
8,842
Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 
  • #3
sophiecentaur
Science Advisor
Gold Member
27,430
6,083
Sorry but your link doesn't work. Stanley.
Many (if not most) antennae operate at a frequency at which the reactive part of their impedance is a lot lower than the resistive part. This happens when the Inductive impedance is nearly equal and opposite to the Capacitative impedance and that is at a resonance. The antenna can then be 'matched' to the transmitter and feeder cable and the efficiency can be optimised.
Don't take this as all you need to know about antennae. They are fiendishly hard devices to understand - but it's a start.
 
  • #4
Baluncore
Science Advisor
2021 Award
11,320
5,575
A tuned antenna is designed as a “resonant circuit”. It operates best at one frequency. Tuning tends to reject off frequency signals while favouring the wanted signal frequency.

There are many different broadband antennas that cover a significant bandwidth, often a factor of ten. Some examples are the cone, discone and loop or patch antennas that are smaller than about 1/10 wavelength. These are used where a wide band of operation is required.

The directional characteristic of small elements is a simple dipole. By using an array of several small wideband elements and inserting a controlled time delay or phase shift in their feed lines, the directional characteristics of the array can be controlled. That is called “beam forming” or “aperture synthesis”.
 

Suggested for: Infinite wavelength resonant antennas

  • Last Post
Replies
20
Views
11K
  • Last Post
Replies
2
Views
6K
  • Last Post
Replies
3
Views
2K
Replies
12
Views
3K
Replies
7
Views
3K
Replies
13
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
10
Views
3K
Top