[HFSS ADS 联合仿真] Design of branch line coupler with 3 dB power division

EE316 Microwave Engineering

Lab 6: Design of branch line coupler with 3 dB power division

记录微波作业，从我做起👀
3dB的 branch line coupler(注意区分这一点,后续博客还有个10dB,3阶的branch line coupler!!)
利用ADS仿真（Line calculator）得到MLIN的参数，然后再HFSS中画出模型。
仿真源码：https://github.com/rzy0901/Microwave-Simulation

Objective.

• Design of circuit model of the branch-line coupler with 3 dB power division using ADS.
• Full-wave simulation of branch-line coupler using HFSS:

• Schematic considered:

• Dimensions for 3 dB branch-line coupler:/

HFSS Design.

• Model:

  Fig.4 HFSS Model

• Result:

• phase response:

  

ADS Design.

• Circuit:

• Result:

Analysis & Conclusion

• For both results, S(1,1) and S(4,1) is greatly less equal than -30 dB at 2 GHz. S(2,1) and S(3,1) approximately equal -3 dB at 2 GHz.
• This means that the design of branch line coupler with 3 dB power division is successful.

其实Port3与Port2之间还有90${}^{\circ }$的相位差别以及相同的幅度，当时忘记解释了。