Title :
A tunable dual-band DGS stub tapped branch-line coupler
Author :
Leong, Chon Chio ; Choi, Wai Wa ; Tam, Kam Weng
Author_Institution :
Wireless Commun. Lab., Univ. of Macau, Macau, China
Abstract :
A tunable microstrip dual-band branch-line coupler using defected ground structure (DGS) stub tapped branch line is presented in this paper. Tuning the geometrical parameters of the DGS, both characteristic impedance and electrical length of an open stub can be controlled. To verify the frequency agility, a prototype dual-band coupler operated at 0.8 GHz and 1.9 GHz with 100 MHz frequency tuning range is fabricated and measured. In the frequency tuning range, the overall small phase and amplitude errors are also observed respectively.
Keywords :
defected ground structures; microstrip lines; waveguide couplers; amplitude errors; characteristic impedance; defected ground structure stub; dual-band coupler; electrical length; frequency tuning range; geometrical parameters; small phase; tapped branch line; tunable dual-band DGS stub tapped branch-line coupler; tunable microstrip dual-band branch-line coupler; Couplers; Dual band; Impedance; Insertion loss; Microstrip; Passband; Tuning; Coupler; defected ground structure; dual-band; frequency tuning;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2010 Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-7590-2
Electronic_ISBN :
978-1-902339-22-2
