This brief presents a new generic wideband Butler matrix topology with an expanded range of radiation beam angle. Both Butler matrix with equal phase differences (BM EPD) and Butler matrix… Click to show full abstract
This brief presents a new generic wideband Butler matrix topology with an expanded range of radiation beam angle. Both Butler matrix with equal phase differences (BM EPD) and Butler matrix with unequal phase differences (BM UEPD) are studied and simulated, and the equations of the array factor are derived. Arbitrary phase differences have been realized when different input ports are excited, referring to flexible beam controllability. To prove the design concept, a
               
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