[求助][求助]求助找两篇文章。

[求助]求助找两篇文章

1、Besser,. “Computer. tweaking. yields. 3-dB. interdigitated. directional.
coupler,”. MSN,. pp. 114–118,. Sept. 1979.
2、Computer-Aided Design of Microstrip Couplers with Accurate Discontinuity Models
Hammerstad, E.
Page(s):  54- 56

Microwave Symposium Digest, MTT-S International

Volume: 81  Issue: 1  Date: Jun 1981

谢谢啦。