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how to insert resistor into the patch antenna design

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kaandee

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hi friend
any one help me...I have attached one paper which has designed using resistor. how can we insert resistor into the triangular patch antenna.

thank you
 

Put a via grounded SMD resistor at the vertex and take care with the inductance introduced by the SMD component and the via.
BTW while it seems to be a good way to decrease the resonant frequency of the patch, I bet you are going to reduce the radiation efficiency quite a lot...
 

Hi kaandee,
I think, that a Via-GND-ing isnt the best solution at such frequencies...
Other problematics is the only 0.72mm material thickness.
In my opinion you have basically two possibilites:
1, you apply a small slot on the place of termination & do insert trough PCB manually i.e. 3 smaller smd resistors(minimum 0402, but their dissipation is limited to ca. 70mW per piece)_practically thickfilms, or special Rf types_and solder that both sides.
2, you calculate the longhole/slot at terminating point & do fill it with resistor paste...
Thes way has mor worse tolerances & expensiver...
If the dissipation is a limit_ it exists special termination resitors too; but their costs some more...
K.
 

Hello,

You can do this with simple steps in AWR Microwave Office (MWO)...
I created Antenna & then aded ports, including a via port & then deembeded in the schematic & also included a resistor I am getting good S11 results & also if I am tuning the resistor ther resonance is shifting...:D

See the attached pictures....:arrow:


---manju---
 

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