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Enhancing the gain of microstrip antennas at different frequencies with one substrate–superstrate structure
Author(s) -
Shen XiaoHai,
Delmotte Peter,
Vandenbosch Guy A. E.
Publication year - 2000
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 - 10.1002/1098-2760(20001005)27:1<37::aid-mop11>3.0.co;2-h
Subject(s) - antenna gain , microstrip antenna , microstrip , materials science , high gain antenna , microwave , patch antenna , dielectric , relative permittivity , antenna (radio) , substrate (aquarium) , optoelectronics , permittivity , optics , engineering , telecommunications , physics , antenna factor , oceanography , geology
A dielectric superstrate with a high relative permittivity is used to enhance the gain of a probe‐fed microstrip patch antenna. The gain as a function of frequency and distance between the patch and the superstrate is investigated experimentally. Under the resonance conditions for a high gain, the maximum gain can be obtained at only one frequency point with a fixed superstrate. It is discovered in our measurement that the maximum gain frequency can be adjusted by changing the distance between the patch and the superstrate. Using a dielectric superstrate with ε r =10.5, a 10 dB gain increment is obtained in the measurement. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 27: 37–40, 2000.