Premium
Low‐cost low‐sidelobe microstrip array with circular polarization
Author(s) -
Tang XiaoRong,
Zhong ShunShi,
Sun Zhu,
Liu JianJun
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23687
Subject(s) - beamwidth , microstrip antenna , microstrip , chebyshev filter , axial ratio , engineering , optics , circular polarization , bandwidth (computing) , return loss , microwave , polarization (electrochemistry) , electrical engineering , antenna array , physics , antenna (radio) , electronic engineering , telecommunications , chemistry
Abstract A low‐cost low‐sidelobe microstrip array antenna with a symmetric main beam of circular polarization (CP) is introduced. The array antenna has a coplanar feed network to excite a Chebyshev current distribution in the horizontal direction and a uniform distribution in the vertical direction of a 4 × 3 elements array. The CP operation is realized by using the corner‐fed quasi‐square patch elements. Measured results show that the array has a sidelobe level (SLL) of −21 dB in the horizontal plane, the half‐power beamwidth of 27° for two main planes both and the axial ratio of below 3 dB within the main beam. Its return loss is less than −10dB for the impedance bandwidth of 40 MHz. Its measured gain reaches 13.9 dB at 2.55 GHz. It is a low‐cost low‐sidelobe design with thin profile, simple structure, CP operation, and symmetric main beam, suited for the radio frequency identification (RFID) readers and other wireless systems. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2384–2386, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23687