uneven series fed antenna array question

Y

yefj

Advanced Member level 5
Joined
Sep 12, 2019
Messages
1,543
Helped
1
Reputation
2
Reaction score
5
Trophy points
38
Visit site
Activity points
9,283
Hello i have a series fed antenna array as shown below.
as you can see by the far field all the patches are fed with the same voltage value.
also when i looked at the e-field cut plane i saw the same efield pattern at the feeding of the patch.
I know that that this series fed array acts as a voltage divider from the excitation source.
how can i change a series feeding of this array so i could control the voltage going into the array?
Thanks.




 

Sort by date Sort by votes
Adding open stubs on the feeding transmission lines between antennas will change the control voltage amplitude.
Changing the length of the transmission lines between antennas will change the phase going into array.
When doing the modifications above, the distance between array antennas should remain unchanged.
 

Upvote 0 Downvote
Adding stub terminated with a vias can shift frequencies.that depend on your deposition material and substrate's square resistence by different bias voltages .The frequecy shift is bias controlled.You need voltage controlled atenuator between array elements or a single attenuator at the array edge, as you consider.
You can use PIN diode or bias tee for voltage controlled attenuator .
 
Last edited:

Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…