天線共振長度

 
最近設(shè)計(jì)一個(gè)天線,類似fork shaped antenna 
                                                                                 
左右各伸出一隻arm, 
                                                                                 
目前遇到一個(gè)問題 
                                                                                 
模擬出來的結(jié)果和計(jì)算結(jié)果是 
                                                                                 
左邊的arm對(duì)應(yīng)二分之波長的共振點(diǎn) 
                                                                                 
右邊的arm對(duì)應(yīng)四分之波長的共振點(diǎn) 
                                                                                 
老師問我為什麼會(huì)左邊和右邊對(duì)應(yīng)的共振長度一個(gè)是四分之波長,另一個(gè)是二分之波長 
                                                                                 
目前只能回答他計(jì)算出來結(jié)果就是這樣..... 
                                                                                 
老師對(duì)於這個(gè)答案不是很滿意,他希望我能解釋他的電波意義 
                                                                                 
有人知道為什麼嗎？ 是否有相關(guān)的paper在探討這種問題？(有沒有關(guān)鍵字) 
                                                                                 
希望有大大可以幫我解惑,謝謝 

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