Compact T-complementary split-ring resonator antenna and antenna array

Abstract

A compact T-complementary split-ring resonator (CSRR) antenna was developed. Different from traditional designs, the proposed CSRR functioned not only as a loading structure but also as a radiator. The operation of the T-CSRR antenna was similar to that of a slot antenna with a gain of 3.1 dBi. Because of the loading effect of the CSRR, the size of the radiator of the proposed antenna was only 0.14λ₀ × 0.26λ₀. The circuit sizes of the proposed T-CSRR antenna were 50% and 74% smaller than those of the traditional half-wavelength slot and T-shaped monopole antennas, respectively. For further gain enhancement, the performance of two feasible array arrangements, namely collinear and parallel arrays with 1 × 4 T-CSRR elements, were compared, which revealed that the parallel 1 × 4 T-CSRR antenna array can achieve a gain of 9 dBi at 2.45 GHz.

KEYWORDS:

• Complementary split-ring resonator (CSRR)
• compact antenna
• T-shaped antenna

Acknowledgements

This work was supported in part by the Ministry of Science and Technology under Grant MOST 109-2221-E-182-047, Taiwan, in part by Chang Gung University under Grant BMRP 903, Taiwan, and in part by the National Natural Science Foundation of China under Contract of 61901144, China.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported in part by the Ministry of Science and Technology under Grant MOST 109-2221-E-182-047, Taiwan, in part by Chang Gung University under Grant BMRP 903, Taiwan, and in part by the National Natural Science Foundation of China under Contract of 61901144, China.