Title :
A spiral electromagnetic bandgap (EBG) structure and its application in microstrip antenna arrays
Author :
Yang, Li ; Fan, Mingyan ; Feng, Zhenghe
Author_Institution :
State Key Lab on Microwave & Digital Commun., Tsinghua Univ., Beijing, China
Abstract :
In this paper, a novel electromagnetic bandgap (EBG) structure in a spiral shape is presented. This new EBG structure is a mushroom-like lattice with each element consisting of an inserted spiral branch. A typical period of the EBG lattice is 4.8% λ0 at the desired bandgap frequency. Compared with the conventional mushroom-like EBG structure, simulations and experimental results have verified that the area of the spiral EBG structure is less than 14% of the former. Especially, an even lower bandgap position can be achieved if the winding of spiral branch is farther increased. Also a double element microstrip antenna array inserted with the new EBG structure has been fabricated, showing a 4.93 dB mutual coupling reduction.
Keywords :
microstrip antenna arrays; photonic band gap; spiral antennas; double element microstrip antenna array; mushroom-like lattice structure; mutual coupling reduction; spiral electromagnetic bandgap structure; Frequency; Lattices; Metamaterials; Microstrip antenna arrays; Microstrip antennas; Mutual coupling; Periodic structures; Photonic band gap; Shape; Spirals; Electromagnetic bandgap (EBG) structures; microstrip antenna arrays; mutual coupling; surface wave;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1606740
