求两篇ieee文章，谢谢:New Differential Phase Shift Networks Combining All-Pass and Band-Pass Elements Published in:
Microwave Symposium Digest, 1981 IEEE MTT-S International
Date of Conference: 15-19 June 1981
A new broad-band multiport differential phase-shift network with non-Nπ/2 output phase differences
Published in:
Proceedings of the IEEE (Volume:59 , Issue: 8 )
Date of Publication: Aug. 1971
A new broad-band multiport differential phase-shift network with nonNπ2 output .pdf
