各位一個關于series-fed microstrip antenna array的問題

請問，采用series-fed 形式來作微帶天線陣，其輻射主瓣是否一定會隨頻率的改變而改變？比方說，中心頻率20GHz，此時主瓣方向為90度，符合設計需要。當頻率改變為18GHz時，主瓣方向為87度；同樣，主瓣在22GHz時變成了93度，不再符合設計需要。是否有辦法抵消這樣的偏移。僅作學術討論，和商業項目無關，希望各位大俠不吝賜教。假設天線是采用全微帶結構，單層且全地。謝謝大家。

網友回復:

search papers published by Sakakibara who has deigned a series-fed array with stable radiation direction.

網友回復:

 
Thanks for your reply. I did a search with author's Sakakibara in IEEE Xplore. I found several papers from him about Waveguide and Microstrip antenna. Unfortunately, I did not find any clue about design a series-fed MSA array with stable radiation direction over frequency. Could you give me some more details about papers of Prof. Sakakibara relate to such topics？

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