A Study on the Improvement of the Directivity for Rectangular Microstrip Patch Array Antennas Conformed to a Cylindrical Surface

원통면에 정합-배열된 장방형 마이크로스트립 패치 안테나의 지향성 개선을 위한 연구

  • 고광태 (전북산업대학교 전자공학과) ;
  • 구연건 (홍익대학교 전자공학과)
  • Published : 1994.06.01


In this paper, an analysis and design method is proposed, which is to improve the directivity of microstrip array antennas conformed to a cylindrical surface. In the case of forming an arc-array in the circumferential direction on a circula-cylinder surface, the circular-cylinder can be approximated to a polygonal-pillar and on each pillar-planes the sub-arrays, Dolph-Tschebyscheff array and uniform array with a beam steered in the desired direction, would make a sharp directivity for the total cylin- drical array antenna. And the radiation pattern according to the type of its sub arrays is analyzed and compared using the cylindrical-cavity codel. A cylindrical microstrip array antenna, with 12 elements and uniform arra as a sub-array which have an equal distance$\lambda_0$/2between the elements, is manufactured and conformed to a cylinder with radius of 6 The measured data of side lobe level, HPBW and FNBW are - 13dB, $9^{\circ}$, and $15{\circ}$, ,respectively. This result shows a good improvement on the directivity comparing with a linear array.