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docs/aameeting/fourth_aa_meeting.md

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+# Third AA Meeting
+>[x] ---06/20/2020 by Yimian Liu     
+>[x] Participaants: Boyao Yang, Weizhou Wen, Yimian Liu, Yidi Song   
+>[x] Location: EE 5 floor AA office   
+
+## Ques
+ - PCB design problems
+ - convert gergle to brp
+ - how to submit PCB design
+
+## Techninal Suggestions    
+- Place through hole alone the high frequency line
+- Use Laying copper to ground most place
+- Check the minimum width of wire
+-