antenna-theory.com Forum Index antenna-theory.com
Antenna Theory
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Search found 39 matches
antenna-theory.com Forum Index
Author Message
  Topic: H_Plane coupling!
Abu Maria.

Replies: 2
Views: 8662

PostForum: Questions Related to Antenna Theory   Posted: Wed Jun 06, 2012 8:44 am   Subject: H_Plane coupling!
very good intuition! big...
but
i simulate (02) patch antenna ,one time with (low epr , high substrates ) and in other time with (high permitivity , low substrates)
and
I find the opposite of w ...
  Topic: H_Plane coupling!
Abu Maria.

Replies: 2
Views: 8662

PostForum: Questions Related to Antenna Theory   Posted: Tue Jun 05, 2012 10:11 am   Subject: H_Plane coupling!
hi.
please ...
in H-plane coupling between (02)patch antenna

http://images.elektroda.net/49_1338823961.jpg

in a publication, they found that the coupling with (low permitivity +thick subsrat ...
  Topic: I found this in Balanis...
Abu Maria.

Replies: 4
Views: 9918

PostForum: Questions Related to Antenna Theory   Posted: Tue Apr 17, 2012 8:03 am   Subject: I found this in Balanis...
ok thank you very for this advice...
f someone else can explain what was said Balanis
because I begin to admit what big said about this book
  Topic: I found this in Balanis...
Abu Maria.

Replies: 4
Views: 9918

PostForum: Questions Related to Antenna Theory   Posted: Sun Apr 15, 2012 5:13 pm   Subject: I found this in Balanis...
really, it escapes me!!! (exuse my english)
in balanis chapter 14 , page 820 , and in example (14.1)
he propose a patch antenna with (h=1,588 mm , ep_r=2,2 and fr=10GHz)
he calcule the parameter o ...
  Topic: I found this in Balanis...
Abu Maria.

Replies: 4
Views: 9918

PostForum: Questions Related to Antenna Theory   Posted: Wed Apr 11, 2012 9:38 am   Subject: I found this in Balanis...
I have done my best to forward the issue well, my English is a little weak...if there is something incomprehensible then let me know Smile
thank you
  Topic: I found this in Balanis...
Abu Maria.

Replies: 4
Views: 9918

PostForum: Questions Related to Antenna Theory   Posted: Tue Apr 10, 2012 10:23 am   Subject: I found this in Balanis...
hello...
Balanis said"...

If W (larger) >L (longer) >h, the dominant mode is the TMx 001 whose resonant frequency is given by (V0/2W*sqrt( ع_r)) ..." chapter 14 /cavity mode ...
  Topic: height substrat
Abu Maria.

Replies: 3
Views: 9425

PostForum: Questions Related to Antenna Theory   Posted: Sat Mar 17, 2012 5:16 pm   Subject: height substrat
thank u all
splender you say"...Thicker patch antenna, or smaller eps, usually means that antenna is less reactive (capacitive usually)"

why?
Normally, when you have a high thickness, ...
  Topic: height substrat
Abu Maria.

Replies: 3
Views: 9425

PostForum: Questions Related to Antenna Theory   Posted: Tue Mar 13, 2012 2:47 pm   Subject: height substrat
hi

firstly thank you for all your answers...

I read an interesting link in this forum

http://www.antenna-theory.com/antennas/patches/patch4.php

but i have questions:

1-why PHYSICALLY w ...
  Topic: grating lobes
Abu Maria.

Replies: 2
Views: 8394

PostForum: Questions Related to Antenna Theory   Posted: Tue Feb 07, 2012 8:55 am   Subject: grating lobes
or wa say
lambda/2: appear side lobe
lambda:appear grating lobe
  Topic: grating lobes
Abu Maria.

Replies: 2
Views: 8394

PostForum: Questions Related to Antenna Theory   Posted: Mon Feb 06, 2012 5:19 pm   Subject: grating lobes
helo
please grating lobe in array antenna
1-distance which allows the appearance grating lobes is lambda or lambda/2
thnak u
  Topic: mode in patch antenna
Abu Maria.

Replies: 6
Views: 15327

PostForum: Questions Related to Antenna Theory   Posted: Fri Jan 27, 2012 9:32 am   Subject: mode in patch antenna
thank u very much
then in balanis, he puts Hx equal to zero (Hx=0)
x:direction normal to the surface of the patch
he conisder x the direction of propagation.
then

the direction along the leng ...
  Topic: mode in patch antenna
Abu Maria.

Replies: 6
Views: 15327

PostForum: Questions Related to Antenna Theory   Posted: Tue Jan 24, 2012 9:00 pm   Subject: mode in patch antenna
ok thank you big, but please just tell me why the mode is TM?
  Topic: mode in patch antenna
Abu Maria.

Replies: 6
Views: 15327

PostForum: Questions Related to Antenna Theory   Posted: Fri Jan 20, 2012 6:14 am   Subject: mode in patch antenna
thank u big steve, but I know how a patch antenna radiates
but in the book "Balanis", , and in the study of coupling between patch , balanis put E_field parallel to the surface condcutrice ...
  Topic: mode in patch antenna
Abu Maria.

Replies: 6
Views: 15327

PostForum: Questions Related to Antenna Theory   Posted: Thu Jan 19, 2012 4:27 pm   Subject: mode in patch antenna
hello
the fundamental mode in patch antenna is TM , but how is possible if the field is perpendicular to the patch conductor ? then it is in the plane transverse to the direction of propagation...
...
  Topic: cross polar
Abu Maria.

Replies: 1
Views: 6591

PostForum: Questions Related to Antenna Theory   Posted: Tue Jan 10, 2012 11:11 am   Subject: cross polar
hi;
what is cross polarisation ? and why it exists in the patch antenna?
thnak u
 
Page 1 of 3 Goto page 1, 2, 3  Next
All times are GMT
Jump to:  


Powered by phpBB © 2001, 2005 phpBB Group