| Author |
Message |
ayhz2002
Joined: 03 Jun 2002
Posts: 103
Helped: 1
|
 06 Mar 2003 5:38 what is a traveling wave antenna? |
|
|
|
thanks in advance
ayhz2002
|
|
| Back to top |
|
 |
g86
Joined: 21 Jan 2003
Posts: 208
Helped: 4
Location: On top of antenna :))
|
| 06 Mar 2003 15:28 |
|
|
|
They are normally long transmission line with a number of bends and discontinuities such that when microwave power flowes therough it, radiations take place at those discontinuities. In these antennas, the phase at those discontinuities are very important. To obtain the input impedance match, another end of the line is terninated with another load (typically ~Z0) and hence they are lossy and broadband.
  
|
|
| Back to top |
|
|
flatulent
Joined: 19 Jul 2002
Posts: 4856
Helped: 292
Location: Middle Earth
|
| 06 Mar 2003 16:42 also waveguide |
|
|
|
They are also made from waveguide with a set of holes down one side. It is all described by the same math.
On the HF frequency range they are wires many wavelengths long that are set at angles to each other so that the lobes in only one direction add. The famous rhombic antenna is one of them.
|
|
| Back to top |
|
|
dragonlea
Joined: 28 May 2003
Posts: 14
|
| 29 May 2003 7:31 |
|
|
|
normal patch antenna is a standwave antenna.traveling wave antenna have matching load.
you can find the details in the book "handbook of microstrip antenna"
|
|
| Back to top |
|
|
