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Feed n/w for 3 element linear array

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Sri_kanth

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Hi,
I am designing a 3 element linear antenna with 1:3 power divider network for feeding. But the length of the microstrip line to the center element differs from other two elements because all three elements are in a single row, so there is a phase variation to the center element compared to other two elements. I tried to increase the center line length but there is space constraint. How can i achieve same phase to all the three elements.
Please suggest. Thank you.
 

Without knowing frequency, power and bandwidth, you may use meandering (curved zig zag shape) to create the same length. Other option is to use a CLC PI network that provides the desired additional phase shift and match at the design frequency (I used this in HF couplers to reduce size).
 

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