Bandwidth Enhancement of Small Square Monopole Antenna Using Self-Complementary Structure for Microwave Imaging System Applications

Date

2015-12-01

Author

Ojaroudi, Mohammad
Aydın Çivi, Hatice Özlem

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A novel printed monopole antenna for ultra-wideband (UWB) applications is designed based on self-complementary structure as a matching network. The proposed antenna consists of a square radiating patch and a self-complementary structure located next to feed line, which provides a wide usable fractional bandwidth of more than 100% (3.04-11.43 GHz). Self-complementary matching network is created, by cutting two rectangular ring slots on the ground plane and by inserting two rectangular rings coupled elements in the top layer; hence, additional resonances are excited and much wider impedance bandwidth can be produced. The designed antenna has a small size of 14x22 mm(2), about 0.15 lambda x0.25 lambda at 4.3 GHz. It is shown that simulated and measured results agree well with each other and demonstrate the usefulness of the proposed antenna for UWB applications. The proposed antenna exhibits almost omni-directional radiation patterns with low cross-polarization levels and provides an acceptable gain over whole band.

Subject Keywords

Babinet's equivalence principle, Microwave imaging system, Self-complementary structure, Square monopole antenna

URI

https://hdl.handle.net/11511/53491

Journal

APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL

Collections

Department of Electrical and Electronics Engineering, Article

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Citation Formats

M. Ojaroudi and H. Ö. Aydın Çivi, “Bandwidth Enhancement of Small Square Monopole Antenna Using Self-Complementary Structure for Microwave Imaging System Applications,” APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY JOURNAL, pp. 1360–1365, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53491.