Electrically Small Antenna with Bandwidth over 2/Q Limit

2/Q 대역폭 한계치를 넘는 소형 안테나 설계

  • Lee, Chul-Hee (School of Electronic and Electrical Engineering, Hongik University) ;
  • Choo, Ho-Sung (School of Electronic and Electrical Engineering, Hongik University) ;
  • Park, Ik-Mo (Department of Electrical and Computer Engineering, Ajou University)
  • 이철희 (홍익대학교 전자전기공학부) ;
  • 추호성 (홍익대학교 전자전기공학부) ;
  • 박익모 (아주대학교 전자공학부)
  • Published : 2005.11.05

Abstract

In this paper, we verify that the bandwidth of the optimized disk-loaded monopole antenna with electromagnetically coupled feed obtained using a genetic algorithm is broader than the theoretical bandwidth limit of 2/Q by simulation as well as by measurement. The measured bandwidth of the optimized antenna (kr : 0.599) is about 42% from 380 MHz to 580 MHz (VSWR<5.8). The efficiency measurement of the antenna is over 90% for the frequency band of operation.

Keywords

Small antenna;Genetic algorithm;Fundamental limit