Abstract
AbstractIn this letter, a miniaturized hybrid dual‐band branch‐line coupler (BLC) with enhanced fractional bandwidths is proposed. Compact size and bandwidth enhancement are obtained using meandered transmission line sections with broken symmetry between cross‐coupling branches. The circuit is designed at a low numerical cost using surrogate‐assisted techniques. The optimized design features small size of only 0.25 λ g × 0.19 λ g (28% miniaturization with respect to conventional single‐band structure), as well as fractional bandwidths of 16% and 9% for 2.5 GHz and 5.4 GHz center frequencies, respectively. The proposed structure is compared against state‐of‐the‐art dual‐band couplers and validated experimentally.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
