provided the lines are of thick‐ or thin‐film manufacture and the coupling is around ‐10 dB. The fundamental nature of microstrip line structure is important in relatively simple couplers and ...
This chapter presents the theory behind coupled microstrip lines. The theory and concepts are applicable to nearly all coupled transmission lines. Two sets of formulas for characteristic impedance are ...
mt MT microstrip thickness [mm] (35E-3) --bh BH box height [mm] (1E23) --sg SG sigma (4.1E7) --rough ROUGH roughness (0) --lt LT loss tangent (0) --mu MU relative permability mu (1) ...
Further innovations include the development of a wideband filtering branch-line coupler that integrates coupled microstrip lines and open-ended stubs. This design boasts a fractional bandwidth of ...