Frequency-dependent characteristics of current distributions on microstrip lines

1989 ◽  
Vol 37 (4) ◽  
pp. 799-801 ◽  
Author(s):  
M. Kobayashi ◽  
T. Iijima
1989 ◽  
Vol 37 (4) ◽  
pp. 793-795 ◽  
Author(s):  
Chin Shih ◽  
Ruey-Beei Wu ◽  
Shyh-Kang Jeng ◽  
Chun Hsiung Chen

Author(s):  
Ming-Lin Chuang ◽  
Ming-Tien Wu ◽  
Shu-Min Tsai

Abstract This study presents a simple switched-band impedance transformer using microstrip lines. The proposed circuit is suitable for loads with frequency-dependent complex impedances at two arbitrary operating frequencies. The transformer comprises two cascaded microstrip lines and two detachable shunt stepped-impedance stubs, which are separately connected to the main line via switching diodes such that provide good matching at one of the two operating frequencies and suppress unwanted signal at the other frequencies. The structure contains several user-set parameters such that designers can create a smaller circuit. The circuit parameters, except the user-set ones, are obtained using the derived design formula. The numerical simulations and experimental results agree well such that validate the proposed structure and the design formula.


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