A Miniaturized and Band Rejection Characteristic of Bow-Tie Monopole UWB Antenna

Abstract

In this paper, a miniaturized bow-tie monopole UWB antenna with band rejection characteristic is proposed. To miniaturize the proposed antenna, a perfect magnetic wall(PMW) condition is applied to primitive bow-tie monopole antenna. An uneven ground patch, a tapered feeding structure and a edge-chopped main patch are adapted for impedance matching. A quater-lambda slot resonator is inserted at main patch to prevent interference in UWB band from another band. The proposed antenna is fabricated on Taconic RF60-A substrate with relative permittivity of 6.15. The size of the proposed antenna is 30.0×39.7 mm 2 , which is only 45 % of the conventional bow-tie monopole antenna.The proposed antenna covers full UWB band with return losses less than -10 dB and has band stop characteristic in 5 GHz WLAN band. The maximum gains are within -1.0 ～5.0 dBi, the group delay variations are within 1.0 ns and the radiation patterns show directivity characteristics in x-y plane.

A half cut design of low profile UWB planar antenna for DCS/PCS/WLAN applications

“…In the proposed design the magnetic field distribution exists only in the vertical direction. The PMW has no tangential magnetic field but the magnetic field normal to PMW will exist . The surface current distribution clearly depicts that the left part of the full design has similar current distribution to that on half cut design (Figure A).…”

Design of UWB Hexagon Patch Antenna with WLAN Notch Band Characteristic

“…[2,3] . 이러 한 조건들을 만족하면서 시스템 내부에 실장하기 편 이한 장점을 갖는 평면 형태의 보우-타이 안테나 [4,5] , 타원형 안테나 [6] , 비발디 안테나 [7] , 프랙털 안테나 [8] 등 다양한 구조의 UWB 안테나들이 제안되고 있다 [9] .…”