Pages: [1]   Go Down
Author Topic: XBee chip anitinna  (Read 1733 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

chip antinna Vs wire antina, which would be better?
thanks in advanced.
Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 653
Posts: 50881
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
chip antinna Vs wire antina, which would be better?
Hammer vs. paint brush? Which would be better?

You haven't defined any criteria for making such a decision.
Logged

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

which of them would have better range? either chip or wire-----XBee
Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 653
Posts: 50881
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
which of them would have better range? either chip or wire
A stubby little chip or a long wire? Isn't that obvious?

The range increases as the antenna gets better - in both length and construction.
Logged

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset


thats not my answer
what would you prefer, xbee with chip antinna or wire ones, for better range??
Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 653
Posts: 50881
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

A chip antenna is not very tall, is it? No, it isn't. So, it will not be as good, in terms of ability to send/receive data, as a longer (wire) antenna.

But, just to make it real simple. The wire version is better!
Logged

Columbus, Ohio USA
Offline Offline
Full Member
***
Karma: 3
Posts: 110
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Check out Digi's paper:

XBee & XBee‐PRO OEM RF Module Antenna Considerations
http://ftp1.digi.com/support/images/XST-AN019a_XBeeAntennas.pdf

Summarizing, they compare both the 1mW XBee and 60 mW XBee-Pro, each with a chip or whip antenna.



Quote
The radiation pattern for the whip antenna is similar to that of a dipole. That is to say, it
is shaped like a donut.  Thus, the performance of a module using a whip antenna, is
relatively insensitive to its orientation in the plane that is perpendicular to the whip
antenna.  On the other hand, the radiation pattern of the chip antenna is not as uniform
as that of the whip antenna.  Therefore, certain orientations will achieve better
performance than others.  As our evaluation was performed, the orientation was
selected to achieve the best performance. ...

After reviewing Table 1, we can make several important observations.
• The whip antenna has a range advantage over the chip antenna, but only outdoors.
• The XBee-PRO can achieve more range than the XBee.
• The XBee-PRO and XBee both achieve more range outdoors than they do indoors.

The whip antenna on the XBee module affords additional range in outdoor applications.
However, it also occupies more space.  If more range is required, and space is a
constraint, then the XBee-PRO with a chip antenna may be more appropriate.  On the
other hand, if more range is a requirement and cost, not space, is the constraint, then
the XBee with a whip antenna may be the best choice. 
It should also be clear that the XBee-PRO can achieve superior range when compared to
the XBee.  Thus, if the application requires more range than the XBee can provide, then
the XBee-PRO with a whip or a chip antenna could be used.  Again, the chip antenna is
best for tight spaces, while the whip antenna achieves more range. 
Logged

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

the tabel is for series 1 radios, can i get that of series 2 ?
Logged

Seattle, WA USA
Offline Offline
Brattain Member
*****
Karma: 653
Posts: 50881
Seattle, WA USA
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Quote
the tabel is for series 1 radios, can i get that of series 2 ?
The radio is the same. Different processor/firmware.
Logged

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

how it could have same range,
datasheet says     series1 has 1mW output and -92db sensitivity
                   and series2 has 2mW output with -96db sensitivity   
???????????????????? 
Logged

New River, Arizona
Offline Offline
God Member
*****
Karma: 19
Posts: 936
Arduino rocks
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

My personal experience:  Chip antenna give me roughly 40 feet indoors through one wall, or two walls whichever is shorter.  Wire antenna, goes 70 feet through one wall or three walls, whichever is shorter.  However, the antenna has to be pointing the same way as the other XBee.  If one wire is vertical and the other is horizontal, take about 10 feet away.  Outside, I really don't know, they reach the width of my yard and work fine, both types.

Series 2 regular, not pro.
Logged

Trying to keep my house under control http://www.desert-home.com/

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

thanks for information
do you have used series 1 radios?  and can you say me practical range with series 1?
Logged

New River, Arizona
Offline Offline
God Member
*****
Karma: 19
Posts: 936
Arduino rocks
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

No, sorry.  I have never used the series 1. 
Logged

Trying to keep my house under control http://www.desert-home.com/

Offline Offline
Jr. Member
**
Karma: 0
Posts: 66
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Has any one tried  practical range with series 1 ?
then please share it with me.
Logged

Offline Offline
Edison Member
*
Karma: 8
Posts: 1341
If you're not living on the Edge, you're taking up too much space!
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Pro version.  1/2 mile thru the woods.  1 mile line of sight.  3-4 walls.
Logged

If you fall... I'll be there for you!
-Floor

Skype Brighteyes3333
(262) 696-9619

Pages: [1]   Go Up
Jump to: