TY - JOUR
T1 - Dual-Band Coupled-Line Couplers With Wide Separation Between Bands
AU - Chang, Chih Chun
AU - Chin, Kuo Sheng
AU - Chiang, Yi Chyun
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/8
Y1 - 2017/8
N2 - In this paper, we developed three designs of dual-band coupled-line couplers with wide separation between bands. Coupler A was constructed using three cascaded coupled-line sections with a band ratio fH/fL of up to 7. Coupler B, with a stub-tapped coupled line, was developed for compactness and has advantages of high band ratio and controllable bandwidth. Couplers A and B are most suited for weak coupling applications. Coupler C was developed for achieving strong coupling while maintaining a high band ratio, and it was constructed using a coupled-line section connected by two uncoupled lines at its two ends. Coupler C has advantages of high band ratio, strong forward-wave coupling, compact size, and easy fabrication. Coupler A, operating at 0.84 and 5.17 GHz with fH/fL = 6.15 / and a coupling of -10 dB, and Couplers B and C, operating at 0.7 and 2.6 GHz with fH/fL = 3.71 and couplings of -11 and -3 dB, respectively, were fabricated for demonstration. The measured results validate their superior dual-band performance.
AB - In this paper, we developed three designs of dual-band coupled-line couplers with wide separation between bands. Coupler A was constructed using three cascaded coupled-line sections with a band ratio fH/fL of up to 7. Coupler B, with a stub-tapped coupled line, was developed for compactness and has advantages of high band ratio and controllable bandwidth. Couplers A and B are most suited for weak coupling applications. Coupler C was developed for achieving strong coupling while maintaining a high band ratio, and it was constructed using a coupled-line section connected by two uncoupled lines at its two ends. Coupler C has advantages of high band ratio, strong forward-wave coupling, compact size, and easy fabrication. Coupler A, operating at 0.84 and 5.17 GHz with fH/fL = 6.15 / and a coupling of -10 dB, and Couplers B and C, operating at 0.7 and 2.6 GHz with fH/fL = 3.71 and couplings of -11 and -3 dB, respectively, were fabricated for demonstration. The measured results validate their superior dual-band performance.
KW - Cascaded coupled lines
KW - coupled-line coupler
KW - dual band
KW - forward wave
KW - high band ratio
KW - strong coupling
UR - http://www.scopus.com/inward/record.url?scp=85018961182&partnerID=8YFLogxK
U2 - 10.1109/TMTT.2017.2693153
DO - 10.1109/TMTT.2017.2693153
M3 - 文章
AN - SCOPUS:85018961182
SN - 0018-9480
VL - 65
SP - 2918
EP - 2929
JO - IEEE Transactions on Microwave Theory and Techniques
JF - IEEE Transactions on Microwave Theory and Techniques
IS - 8
M1 - 7913694
ER -